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I was dressed up as an UDP packet for the Halloween. I don’t think anyone got it, but I couldn’t tell. #humour
Have a great Halloween :)4 -
I feel like a fucking abomination at the moment.
I have been working on an app that is almost like Wireshark. More so for practice than anything else.
I decided that today I would try it out on the network here at my house, so I started the packet sniffer and wanted to see what was going on. I was checking for unencypted text (like telnet and whatnot) and came across this odd address that I hadn't seen before.
I did something that I shouldn't have done, and I fucking clicked and did the equivalent of "follow TCP stream" on wireshark. I fucking went and looked what the text being sent over this fucking network was.
It was my girlfriend, using fuck knows what messenger, but it was unencrypted. I just found out that she is cheating on me. I don't want to go into what the texts exactly say, because it fucking hurts me deep down.
Why didn't she just use whatsapp or something, fuck man. I really don't need this in life at the moment. I am genuinely trying to get my shit in order, I have been coding my ass off at night for extra money to make it, I have been working overtime where I can - fuck I have even tried sucking up to management (I would never do this under normal circumstances) - and to top this off, the motherfucking tax man is giving me hell.
Fuck sakes.
If you want to cheat, fucking do it properly. Because I am in a state of pure sadness and hatred and the moment - and I don't know what the fuck to do.25 -
A tcp packet walks in to a bar and says “I want a beer”, barman says “you want a beer?” and tcp packet says “yes, a beer” .
In high society, TCP is more welcome than UDP. At least it knows a proper handshake.
A bunch of TCP packets go into a bar, until it’s overcrowded. The next day, half as many go in.
A bunch of TCP packets walk into a bar. The bartender says, “Hang on just a second, I need to close the window.”
When I try to send SYNs to chicks, I don’t get any ACKs. Just FINs and RSTs.
IP packet with TTL=1 arrives at bar. Bartender: “Sorry, can’t let you leave…and you don’t get any beer either…”
The worst part about token ring jokes is that if someone starts telling one while you are telling yours, all joking stops.
The great thing about TCP jokes is that you always get them.
The problem with TCP jokes is that people keep retelling them slower until you get them.
I would tell some UDP jokes too but I never know if anyone gets them
The best thing about UDP jokes is that I don’t care if you get them or not.
I had a funny UDP joke to tell, but I lost it somewhere...
The sad thing about IPv6 jokes is that almost no one understands them and no one is using them yet.
I tried to come up with an IPv4 joke, but the good ones were all already exhausted.
A DHCP packet walks into a bar and asks for a beer. Bartender says: “here, but I’ll need that back in an hour!
DHCP jokes only work when there is only one person telling them
The worst part of SSH jokes is that, even when they're not funny, you suck it up and just pretend they were anyway.
The problem with token ring jokes is you need to wait your turn to laugh
I’d make a joke about UDP, but I don’t know if anyone’s actually listening…11 -
From my years at college employment:
A student brought in his personal printer to help desk, complaining that the printer is printing red streaks, when he only has black ink installed.
Opened up the printer, found a packet of ketchup stuck in there.2 -
*has a 94% in information security class*
*teacher gives us study guide for final exam*
*heavily take notes in the margins and study the packet obsessively for four days*
*come in to take the final*
*exam doesn't mention a single thing on the study guide*
*makes a 78 on it*
*final class grade drops down to an 87% (a letter grade lower than before)*
"Congratulations, Miss Meowijuanas! You had the highest score on the final!"
*hands me a candy bar like I'm a child*
"Maybe it's because you gave the class an extremely poor study guide which emphasized on material that wasn't covered on our actual exam? You shouldn't be congratulating me on a 78."
*teacher says he used the study guide from another teacher and must not have looked at it thoroughly enough*
*shakes hand and thanks him for having me as a student this semester*
*kicks a trash bin outside of the university 6 or 7 times*
I'm not even mad about my grade. An 87% is nice, although I know I would've done better otherwise. It's his pure, unmasked and unashamed laziness that makes me feel so violent. It's showing students like me that an educated individual like yourself couldn't be bothered to take five minutes or so to read over a fucking document for his students to make sure they're properly prepared for a major exam.
How the fuck can you be hired as a university professor and be this obvious about not putting effort into your work.
Fuck you, sir.
And fuck you again for all of my other classmates who did poorly because they followed your inaccurate study guide.13 -
Ordered a new 34" Dell Monitor which should have been delivered today. The lazy ass mailman tried to scam my neighbor by telling him to pay 1000€ for the packet... (Amazon doesn't use cash on delivery)
FUCK OFF IDIOT, I HOPE YOU LOSE YOUR JOB BECAUSE NOW I HAVE TO DO YOUR GOD DAMN WORK AND COLLECT THE PACKET ON MY OWN.11 -
I had this prepared in advance and executed on April 1st few years ago.
1. I wrote an app in Python that would autostart self & listen to UDP multicast and spam screen with message boxes once a special "magic" UDP broadcast kicks in. The app had minimum dependencies and used native libs for GUI to achieve this.
2. I posted this app source code on sprunge.us and remembered the short URL.
3. Once one of my coworkers left their PC unlocked, I opened their terminal and executed '$(wget -c sprunge.us/ASDF)' and closed the terminal as if nothing happened. I infected almost all machines this way.
4. On the April 1st I get to my office, open the terminal, send a magic UDP broadcast packet anf enjoy the chaos.
Man, that was hilarious.2 -
I was learning about packets and I was trying pirni (like Wireshark for iPhone) on my local network. I found a packet of my my roommate about a recipe of fancy a fancy dish
me: *enters the kitchen* Bro you need to see this I got this sick recipe of $fancyDish that I really wanna try
le roommate: THERES NO WAY ARE YOU FREAKING KINDING
I know its wrong to spy on peoples trafic but it was worth it hahaha7 -
So I been telling Cox no to upgrading my modem for the past 2 months, my modem works fine, so now last night the modem just stops working, the internet is out and I call support, I tell them the problem and they without even thinking ask what version of modem I have, I tell then gen 2,they then offered a upgrade for free and the old gen 2 ones were not working lately, I reluctantly agreed to swap them for free, so after I got off the phone I was curious, I decided to packet sniff and find all my data is being sent just fine, but once it reaches the Cox main gateway it just drops the packet, I even pinged the DNS and it responded fine, turns out they just shut my connection off and basically forced me to upgrade to their gen 3 enhanced Wi-Fi bullshit8
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i just started learning about networking by sending a packet saying "emoji movie leaked footage" from my laptop to my desktop
for some reason, the fact that i can have two computers interact fills me with some kind of inexplicable joy5 -
It has been bugging the shit out of me lately... the sheer number of shit-tier "programmers" that have been climbing out of the woodwork the last few years.
I'm not trying to come across as elitist or "holier than thou", but it's getting ridiculous and annoying. Even on here, you have people who "only do frontend development" or some other lame ass shit-stain of an excuse.
When I first started learning programming (PHP was my first language), it wasn't because I wanted to be a programmer. I used to be a member (my account is still there, in fact) of "HackThisSite", back when I was about 12 years old. After hanging out long enough, I got the hint that the best hackers are, in essence, programmers.
Want to learn how to do SQL injection? Learn SQL - write a program that uses an SQL database, and ask yourself how you would exploit your own software.
Want to reverse engineer the network protocol of some proprietary software? Learn TCP/IP - write a TCP/IP packet filter.
Back then, a programmer and a hacker were very much one in the same. Nowadays, some kid can download Python, write a "hello, world" program and they're halfway to freelancing or whatever.
It's rare to find a programmer - a REAL programmer, one who knows how the systems he develops for better than the back of his hand.
These days, I find people want the instant gratification that these simpler languages provide. You don't need to understand how virtual memory works, hell many people don't even really understand C/C++ pointers - and that's BASIC SHIT right there.
Put another way, would you want to take your car to a brake mechanic that doesn't understand how brakes work? I sure as hell wouldn't.
Watching these "programmers" out there who don't have a fucking clue how the code they write does what it does, is like watching a grown man walk around with a kid's toolbox full or plastic toys calling himself a mechanic. (I like cars, ok?!)
*sigh*
Python, AngularJS, Bootstrap, etc. They're all tools and they have their merits. But god fucking dammit, they're not the ONLY damn tools that matter. Stop making excuses *not* to learn something, Mr."IOnlyDoFrontEnd".
Coding ain't Lego's, fuckers.36 -
Do you know when you think "Oh that doesn't look too hard. I bet I can do it in no time"?
That is how I felt when I saw the DIY 3D printer kit Anet A8. It's only 150€ on gearbest so that is pretty cheap.
The reviews said it takes about 3 - 4 hours to build and I though "Ok I am a computer specialist and engineer so 3h sounds reasonable".
When I bought it from gearbest the first problems started: 5 days after the estimated shipping date the packet was still not on its way. After I fucked the support up, it finally arrived 3 weeks after the estimated date.
When I took the first look, everything seemed to be fine except for some small scratches but for that price that is not a problem.
So I started to build the printer at about 14:00 and even if some random sites in the manual were in Chinese I felt confident to get it done in a view hours.
And then it started to get really fucked. The first problem was that 2 screws were unusable and I had to use my own screws instead. The next problem was that the manual was just in the wrong fucking order at some points and I had to reverse multiple steps to get it right.
But the most fucked up thing: There should have been 2 threaded rods with a length of 345mm but the rods had a length of 310mm which was nowhere listed in the parts list. So I had to go buy some aluminium rods to fill the gap temporary so that I can at least go on with the build before getting a replacement. And I could go on and on and with the problems but the point is, it is now 19:30 which is about 5.5 hours after I started and I am still not fucking done with this.
So what have I learned?
Cheap Chinese hardware is good, but only as long as you don't have to assemble that shit yourself.2 -
DHL? More like, "Du Hurensohn Lieferst ned!"
Seriously! Fuck DHL so fucking hard! Why the FUCK can you deliver 2 FUCKING PACKAGES, WHICH REQUIRE SIGNING, INFRONT OF MY FUCKING ENTRANCE!! But not, A FUCKING 3rd one! LIKE SERIOUSLY! I WAS AT FUCKING HOME THE ENTIRE FUCKING DAY! THEN I RECIEVE AN EMAIL THAT THE FUCKING PACKAGE "couldnt be delivered because I wasnt at home" YEAH FUCK YOU! 2 INFRONT OF MY FUCKING DOOR! and then... I see him... that fucking DHL guy, with my package, going INTO HIS FUCKING SHITASS DHL CAR, AND DRIVING OFF!
I literally just wanted to open the window and scream "HEY DHL, MEIN SCHEISS PACKET! WO ISSET!?" but I didnt...
FUCK THESE COCKSUCKERS FROM DHL! I HAVE A FUCKING LOUD DOORBELL! RING THAT THING! THERES A BUTTON WITH MY NAME NEXT TO IT!14 -
Client:we want dynamic mapping of network and packet flow visualization like;packet tracer simulation
Us: is 2D visualization enough.
Client:yeah
*fast forward after first demo*
Client: now make it 3D with pipes representing cable.and packets flowing through them like water.
Me: fucccccck3 -
I had spent the last year working on a online store power by woocommerce with over 100k products from various suppliers. This online store utilized a custom API that would take the various formats that suppliers offer their inventory in and made them consistent. Now everything was going swimmingly initially, but then I began adding more and more products using a plug-in called WP all import. I reached around 100k products and the site would take up to an entire minute to load sometimes timing out. I got desperate so I installed several caching plugins, but to no avail this did not help me. The site was originally only supposed to take three to four months but ended up taking an entire year. Then, just yesterday I found out what went wrong and why this woocommerce website with all of these optimizations was still taking anywhere from 60 to 90 seconds to load, or just timing out entirely. I had initially thought that I needed a beefier server so I moved it to a high CPU digitalocean VM. While this did help a little bit, the site was still very slow and now I had very high CPU usage RAM usage and high disk IO. I was seriously stumped the Apache process was using a high amount of CPU and IO along with MYSQL as well. It wasn't until I started digging deeper into the database that I actually found out what the issue was. As I was loading the site I would run 'show process list' in the SQL terminal, I began to notice a very significant load time for one of the tables, so I went to go and check it out. What I did was I ran a select all query on that particular table just to see how full it was and SQL returned a error saying that I had exceeded the maximum packet size. So I was like okay what the fuck...
So I exited my SQL and re-entered it this time with a higher packet size. I ran a query that would count how many rows were in this particular table and the number came out to being in the millions. I was surprised, and what's worse is that this table belong to a plugin that I had attempted to use early in the development process to cache the site. The plugin was deactivated but apparently it had left PHP files within the wp content directory outside of the actual plugin directory, so it's still executing scripts even though the plugin itself was disabled. Basically every time I would change anything on the site, it would recache the whole thing, and it didn't delete any old records. So 100k+ products caching on saves with no garbage collection... You do the math, it's gonna be a heavy ass database. Not only that but it was serialized data, so when it did pull this metric shit ton of spaghetti from the database, PHP then had to deserialize it. Hence the high ass CPU load. I had caching enabled on the MySQL end of things so that ate the ram. I was really desperate to get this thing running.
Honest to God the main reason why this website took so long was because the load times made it miserable to work on. I just thought that the hardware that I had the site on was inadequate. I had initially started the development on a small Linux VM which apparently wasn't enough, which is why I moved it to digitalocean which also seemed to not be enough, so from there I moved to a dedicated server which still didn't seem to be enough. I was probably a few more 60-second wait times or timeouts from recommending a server cluster to my client who I know would not be willing to purchase it. The client who I promised this site to have completed in 3 months and has waited a year. Seriously, I would tell people the struggles that I would go through with this particular site and they would just tell me to just drop the site; just take the money, just take the loss. I refused to, this was really the only thing that was kicking my ass. I present myself as this high-and-mighty developer like I'm just really good at what I do but then I have this WordPress site that's just beating the shit out of me for a year. It was a very big learning experience and it was also very humbling as well, it made me realize that I really don't know as much as I think I might. It was evidence that there is still so much more to learn out there, I did learn a lot from that experience especially about optimizing websites the different types of methods to do that particular lonely on the server side and I'll be able to utilize this knowledge in the future.
I guess the moral of the story is, never really give up. Ultimately things might get so bad that you're running on hopes and dreams. Those experiences are generally the most humbling. Now I can finally present the site that I am basically a year late on to the client who will be so happy that I did not give up on the project entirely. I'll have experienced this feeling of pure euphoria, and help the small business significantly grow their revenue. Helping others is very fulfilling for me, even at my own expense.
Anyways, gonna stop ranting. Running out of characters. If you're still here... Ty for reading :')7 -
A few years ago I was in high school and used to have a small reputation of hacking things. I could hack, just would never hack any school networks or systems (reputation + notice that there was a breach is a bad combo since everyone would immediately suspect you).
Anyways one day the networks internet connection went down in the school district and I was the only one who used a laptop to take notes. So I quickly opened the terminal and ran Wireshark and said to the person to my right "see that button there? yeah I programmed this last night. anytime I press it I can shut down the network so the teacher can't reach her files (she famously only saved them online). *Long dramatic press* Wireshark started scanning the network so all the numbers and lines were going crazy as it viewed the packet info "Now just wait", soon the whole class knew what I had done through whispers and lo and behold a few minutes later and the teacher couldn't reach her files.
Everyone loved me for the rest of the year for saving them from the homework for the week the wifi network was out since it also ended up having to cancel two tests in the class, and a lot more homework and tests in all their other classes. Solidified my reputation and no one fucked with me from that day on. -
A puzzle, just for fun.
Two friends, (a)lice and (b)ob are communicating through a channel encrypted with random numbers XOR'd together, like so:
keyA = randint(1024, 1024**2)
keyB = randint(1024, 1024**2)
msg = randint(1024, 1024**2)
You, an interloper, have watched all these communications, siphoning the packets as they went.
When alice sends a message to bob's mailbox, she does it like so:
mailBoxB = keyA^msg
Bob's mailbox receives the mail automatically, and applies his own key, sending it back to alice's mailbox:
mailBoxA = keyB^mailBoxB
Next, Alice's mailbox notices the message, and automatically removes her key and sends it back to bob's mailbox. All of this, the first message, the second, and the third, happens in milliseconds, the back and forth.
mailBoxB2 = mailBoxA^keyA
Finally, bob's mailbox removes his key, and deposits the now unencrypted message in his box, for him to read in the morning:
mailBoxBFinal = mailBoxB2^keyB
As as a spy, you know the first packet sent to bob, had a value of 589505.
The packet bob sent back to alice, after applying his key, has a value of 326166
The message sent *back* to bob after alice removed *her* key, had a value of:
576941
What are the values of keyA, keyB, and what is the value of the msg?4 -
Why is it I buy a new phone for $500, then within a year it's only worth $50 and a packet of chips?1
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Finally found my topic for the 10 min presentation :
Network protocol security
After giving an overview , i'm gonna talk about http , ftp , telnet , netbios and showing them a sample packet and how easy the username and password can be found if these protocols are used.
Any other recommandation?5 -
What is it with networking guys refusing to do any kind of fault finding? Pretty much everywhere I've worked they seem to be overpaid address hogs who occasionally want everyone to be proud of them for installing a new switch.
Currently seeing a production issue that's clearly due to spikes in packet loss on a certain part of the network - but oh no, it's always "our tests are fine", "we can establish a route no problem", "this is an application level issue", etc.
No you morons, when a dozen unrelated applications hosted on different cloud services fail because none of them can contact anything in your particular subnet in your data center at the same time, it's a damn networking issue. Sort it out.14 -
Internet access at the new Uni is crap. I'm getting so pissed at this shit...
Packet loss spikes to over 50% every 30s or so. Can't keep a single SSH pipe open for longer than a minute. Firewall is so tight infrared light wouldn't get through that shit (understandable. And I use a VPN anyway).
And every. Single. AP. Uses. The. Same. Channel. All of them on 6. At least it's on a tight band... But 1 and 11 are free. 100% clean. You know, you could spread them a bit. That helps. But naaah let's keep everything bundled up. Co-channel interference is OK, right?2 -
While attending an internal training session (some joining the meeting online and some present in the room), an online attendee did not mute their microphone and proceed to eat a packet of crisps/chips. And not softly, but like a horse.
We were also recording it, so now we can listen to it over and over ...1 -
Do you know why you should never use grep when working with XML?
$ grep packet/> final.pdml
> *shit, that takes too long, ctrl+c*
$ du final.pdml
> 0 final.pdml
That's why.3 -
--- s3-r-w.us-west-2.amazonaws.com ping statistics ---
44 packets transmitted, 16 received, 63,6364% packet loss, time 43544ms
rtt min/avg/max/mdev = 258.995/280.765/377.149/37.359 ms
Sounds like a good day to grab a ball and go outside.4 -
So I just discovered an awesome feature provided by my mobile provider for only 0.99€ per month.
Yeah, Deep Packet Inspection is only 0.99 extra.
Why should I pay my provider for watching my traffic? Sure, they allert me when downloading viruses, but that is a lame excuse, especially for mobile use.4 -
What the fucking fuck is this bullshit?!
I feel like most journalists don't even have brains.
I wake up and I can't fucking turn my head or move my arms so I try to turn on TalkBack with my left hand since I can't fucking see what's on the damn screen of my phone. I google something along the lines of "jammed neck muscles" and as I am in so much pain that I am involuntarily crying I start to search for some way to limit the pain. "Jammed neck muscles? Try these few steps!", you open the page and they proceed to put 10 pages of non-sense in front of the actual steps - every single fucking article. DO THESE PEOPLE HAVE THE IQ OF A CENTIPEDE?!! After 12 minutes of this shit that I had to listen to I just said fuck it and somehow managed to throw myself off the bed and onto the ground - where I landed on all four and was somehow able to stand up and grab some Theraflu forte(apparently paracetamol is the best cure for jammed neck muscles and I know that there are 1000mg of it in one packet of theraflu) from my cardboard box full of meds.4 -
The coffee/food room on my floor is absurd.
On day, the Keurig machines, microwave oven and convection oven all disappeared. Turns out they were owned by some employees and when they moved to an other floor they took their stuff with them.
In the caffeine-deprived panic that ensued, a bunch of other employees pooled together some money and went across the street to purchase new applicances.
They now charge us 5¢ for each packet of sugar or milk/cream cup. And they announced it with a passive-aggressive poster with an angry dog on it.2 -
The genius design of “Techno-city”, now defunct tech retailer.
By merely rearranging letters of the brand name, designers created a whole narrative. The flexibility of Russian language allows that.
Translation:
They aren't Sith
Techno-city
Shadows of their cells
There are hundreds of them
They bring networks
This packet carries them
Carry the next big thing
1 -
Jesus fucking christ how can the latest Macbook be such a piece of crap? I'm currently travelling and wondering why I'm getting such an atrocious 40% packet loss and round-trip time up to 3 seconds.
Then I remember having Wi-Fi issues in the office with certain adapters, one of which I'm currently using, while I'm tethering over Wi-Fi ... disconnecting the adapter yields a perfect 0% packet loss and 30ms RTT. It Just Works® my ass. This is _one_ of the things that suck about the macbook.10 -
Just upgraded my internet service from a WISP, that could only get 1mb down and 1 up on a good day with lots of packet loss, (hack job company no improving infrastructure) ... for reference in live out in woods in northern Michigan.. sooo there arnt many options... DSL, don’t cross the river to me, neither does cable or fiber. Cell signal doesn’t work either as you can see.
So I had to try out satellite... went with viasat... got put on viasat-2 and holy shit first time in 4 years since living here have I been able to stream, and download and upload to my servers without having to take a nap. But the experience of dealing with what I did for 4 years definitely caused me to be more creative in what I do, and how I process data, and transmit data. Definitely an experience that taught me lot and gave me a lot of knowledge.
But now I’m in what I will consider “phase 2” there will be faster internet to come... Ariel fiber is being ran by the power company... but they are min 2 years out.. and Elon’s sats will also be next sooo good times to come..
Yeah yeah I know the ping rate sucks.. but guess what... I don’t play games so I don’t care... and as far as voip or web conferencing goes yeah there’s a slight delay/lag.. but I just tell them.. when you call me or conference with me pretend I’m not on earth.. boom the latency is explained then hahah.
1 -
After debugging this shit Java program for 2 days fucking straight, finally this shit works! Hallelujah!
Turns out, if you want to enable local DCOM/COM+ on windows, you have to not tell the piece of shit firewall that it should consider the network "public"...
WHY?!?
IT'S FUCKING LOCAL! NOT A SINGLE FUCKING NETWORK PACKET IS SEND! WHY?!?4 -
The boy is smoking and leaving smoke rings into the air.
The girl gets irritated with the smoke and says to her lover: "Can't you see the warning written on the cigarettes packet, smoking is injurious to health!"
The boy replies back: "Darling, I am a programmer. We don't worry about warnings, we only worry about errors."3 -
The networking group at my day job, hooooooolly crap I have some unprintable words. But keeping it professional:
* Days to turn around simple firewall whitelisting requests
* Expecting other teams to know the network layout despite not sharing that information anywhere and going out of their way to not share it
* Adding bureaucracy in the form of separate Word doc forms despite having a ticketing system - for no justifiable reason
* Breaking production systems multiple times per month
* Calling in with problems that are clearly network related, being told it’s our systems, and then the problems magically go away even though they swear they didn’t touch anything
* Outright verifiable lies or vague non-answers when they’re not talking to someone at the director level or a vendor from an outside company on conference calls
* Worse packet loss and throughput on our LAN than my home ISP
Doing anything with these clowns is my single biggest source of stress right now. I can’t wait until we get a full SDN stack set up and then we won’t have to deal with them for day-to-day needs any longer.
My boss swears it’s better that we’re not managing the network directly, but I’m pretty sure my friend’s dog could be loosed into the data center to chew on fiber, and eventually the pairs would be connected in such a way as to improve performance.1 -
So today I was messing with a side project and for context it’s a networking program.
So I’ve designed the programs packets and what each do. The final step is just constructing them and sending them, but wait some random error that I traced from the file path being wrong to the packet containing a files name but then I realized that the packet after the file name wasn’t sending and so I looked at the contents of the first packet and IT WAS SENDING BOTH CONTENTS IN ONE and I fucking can’t tell you how hung up on this I got because there was nothing wrong with any other packet in anyway, and if I commented the file name packet out the next one worked and vice versa and it was so fucking infuriating and out of desperation I thought “what if I just gave it time between sending both” AND IT FUCKING WORKED. ONE LITTLE FUCKING sleep(.5) FIXES THE PROBLEM THAT PLAGUED ME QUITE LITERALLY ALL DAY I CANT. IM PRETTY SURE ITS STILL NOT A GOOD SOLUTION BUT IM ROLLING WITH IT!1 -
Packet tracer sucks ass.
It's more unstable than my stomach after gas station sushi and drinking a whole bottle of miralax.1 -
I have been working on IoT projects for last five years. After using MQTT in many of my projects I have realized that there is a huge learning curve for the beginners to understand and implement MQTT in their projects. The packet structure of MQTT is complex and MQTT packets are difficult to debug. Also customizing the open source MQTT brokers are also difficult for the beginners, and sometimes even for the experts.
To make IoT and Messaging simple, I am designing a new protocol which uses JSON packets for data exchange and is far less complex than MQTT. I am also developing an open source project which will contain a server (with load balancer support), a python client, a Javascript client and a python based load balancer. I hope this project will reduce the development time as the protocol is easy to understand and the open source code is fully modular & easy to customize.
This will be my very first contribution to the open source community. Wish me luck! -
Having fun with my nvidia graphic card 😎..........
I am talking about graphic card's packet not graphic card LOL
1 -
More network/hardware than dev but anyway: I use OPNsense as a firewall at home on an embedded system. Had everything set up nicely and appearing to be working fine, quite a lot of things set up (static leases, VLANs with various firewall rules etc. - a fair bit of stuff involved). I noticed my remote system was failing to back up to my local one. Turned out port forwarding wasn't fully working (initial packet got through but nothing else). I noticed this at midnight.
Ran an update to see if that helped - nope. Reboot time then! It made its shutdown noises and I waited 15 minutes before giving up (no noises, no ping response). Took SD card out. Copied a fresh install onto it, thus wiping all settings. Booted up fine, set up my internet connection, all good. Proceeded to configure it. Noticed I couldn't access the internet from my PC, but could from the firewall itself. Rebooted the firewall. It didn't come back up. Argh!
Reinstalled AGAIN. Attached a serial cable and it was complaining about something which sounded like it couldn't read the SD card. Tried another. Nope. Looked online (using phone): known issue to do with boot delays.
Gave up and went to bed at this point (4am).
Next day: Installed it in a VM instead. Still no internet from my PC! Another known issue to do with default gateway not being the PPPoE interface. Got into shell, manually changed the default route. Was then able to update to the latest version which fixes the gateway issue. Rebooted the VM. All good.
Put all my settings back in, this time taking a backup afterward.
Only to discover....
....port forwarding wasn't working properly. Back to square 1.
Poked around with some NAT settings (outbound ones), made no difference, undid those changes and suddenly it started working.
WTF? /waves arms in the air
OPNsense folk were very helpful, producing a new build for me to try within a couple of hours of me asking about the problem.
But days like that, I start to question whether I really enjoy technology as much as I thought I did... -
A DHCP packet walks into a bar and asks for a beer. Bartender says, "here, but I’ll need that back in an hour!"
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Hmm I'm thinking of reverse engineering an old game client and trying to rebuild the backend server from scratch... In a different language..
Quite a big idea 😅 but it should be very educational! Anyone got some tips and or tricks for reverse engineering? Or some pitfalls I should avoid?4 -
I have been working on IoT projects for last five years. After using MQTT in many of my projects I have realized that there is a huge learning curve for the beginners to understand and implement MQTT in their projects. The packet structure of MQTT is complex and MQTT packets are difficult to debug. Also customizing the open source MQTT brokers are also difficult for the beginners, and sometimes even for the experts.
To make IoT and Messaging simple, I am designing a new protocol which uses JSON packets for data exchange and is far less complex than MQTT. I am also developing an open source project which will contain a server (with load balancer support), a python client, a Javascript client and a python based load balancer. I hope this project will reduce the development time as the protocol is easy to understand and the open source code is fully modular & easy to customize.
This will be my very first contribution to the open source community. Wish me luck!3 -
These days i like to think of our data privacy as that of an amazon package delivery between person A to B
- Person A wants a packet of condoms and guns, but don't want society to know about it
- person B wants to send guns and condoms to B
- Amazon is willing to provide transportation with a pinky promise that it won't tell anyone about the delivery.
- Thus B gives the condoms and guns to Amazon wrapped up in hard box hoping that Amazon or anybody else won't open it. Similarly A receives the packet hoping that nobody else got to know about it.
But the problem is a LOT of people could possibly know of the contents, even if A or B aren't willing to share details
- Amazon can look into it.
- government can stop the amazon car transporting the packet and force them to look into it.
- some 3rd person(aka hacker) could fool the delivery truck and get access to packet contents.
=======================================
and this morning, my neighbour, A very radical hindu supporter, frustrated by the recent tablighi jamaat fuck-up , gave a very strange statement "you know in future, the government would pass a law which will allow them to hear these ppl's calls /whatsapp messages. This will allow government to detect and take actions on every of these anti-national scums"
I wanted to say WHAT THE FUCK ARE YOU HOPING FOR, BOOMER? THAT'S CENSORSHIP!! but i couldn't say because his illiterate vision is no longer a hope, i can see it becoming reality.
Personally i am equally angry with that whole incident and how that community handled it. But how can anyone ask for censorship, just because a few elements misused it? The problem lies with thise elements and people who support their thoughts not the whole community or the communication medium.
From what i have heard in the recent US and indian law news, they are essentially trying to peek into the data we send to each other legally.
So going by the package delivery analogy, its like government now wants to have every amazon delivery happen in transparent boxes in a transparent truck, just because a few people ordered illegal items via amazon delivery.
This world is going crazy and stupid.3 -
RIP cisco test....
Teach told us that we're writing an exam of the topic 5.1.4...something, ok, I downloaded the files (packet tracer, PDF). 20 minutes after I realized that I was working on the wrong one, coz it was actually 5.2.something, soooo I fucked up half of the time (a lession is about 40 mins) and when I finally finished I saved the PDF where my answers were given, uploaded it and when I checked it I saw the raw document.
I fucked this up reeaal baad.... I can't even focus on a fucking easy task now, I have to calm down -
Thinking back, it’s pretty terrible how long it took to create my first real development project.
When I was the ages of 13-18 I built websites on and off but I would never consider them good enough. I would literally design a bunch of images and then, using just HTML, put all the images together like a puzzle using exact pixel locations. Might be fine and dandy now but back then it would look great on my monitor but on others it would be an absolute mess.
Anyways, after that I got in college and started learning C++ and did assignments but I don’t count those as my own either. Not until I was 29 (my current age) did I finally develop a program assigned by my internship. Prior to that I always just re-learned C++ over and over again off and on because I had no clue where to go after that.
Apologies for the long intro. So the first development project that I feel is legit at my internship I had to use my companies API to track the amount of time it took for them to encrypt a packet and then decrypt it as well as grabbing the packet and seeing how long the hash was, the letters used in which position and so on. Essentially grab a whole bunch of statistics from their software and then output it to an excel document. It had a menu, and I had to make it work on Windows, Ubuntu, Raspbian, and some other systems on different devices.
I was actually really proud of what I ended up with and they use it to test their new versions and compare and so forth. -
!rant / Joke
RoR dev (Me): Damn, I gotta learn more about that routing DSL... Shit's powerful.
Networker: That sentence made zero sense... Did you just use technobabble? Go to marketing you dweeb.
Well, Matz really trolled the networkers there...
Ruby/Rails:
DSL(Ruby) = Domain Specific Language.
Routing (Rails) = Defining URL Patterns and assigning them to controllers.
Networks(As far as I understand, I only know the absolute basics there):
DSL = Digital Subscriber Line
Routing = The act of passing a packet through another network
"Oh, you can't help that," said the Cat: "WE'RE ALL MAD HERE. I'm mad. You're mad."
And the weird penguin building a rails app is mad too I guess.1 -
Coding gameserver emulators. It's always fun to code for a game which you don't have to do any of the artistic side and all of the functionality side.
Also network packet sniffing and trying to figure out what each this is is pretty fun. Love it.2 -
... worst drunk coding experience?
none. or to be more precise, all of the three of them I had. I can't code drunk, i hate doing it, i hatw even thinking about doing it when drunk.
so after those initial three attempts i don't try to do it again, ever.
BUT, best coding experience while high?
ALL OF THEM.
some of the best pieces of code I wrote i did when I was high. my mind goes into overdrive at those times, and my thinking is not lines/threads of thought, but TREES of thought, branching and branching, all nodes of each layer of the tree coming to me AT ONCE, one packet == whole layer across all of the branches.
and the best was when one day, in about 14 hour marathon of coding while high, i wrote from scratch a whole vertical slice of my AI system that i've been toying around in my head for several years prior, and I had all of the high-level concepts ALMOST down, but could never specify them into concrete implementations.
and I do mean MY ai system, my own design, from the ground up, mixing principles of neural networks and neuropsychology/human brain that I still haven't seen even mentioned anywhere.
autonomous game ai which percieves and explores its environment and tools within it via code reflection, remembers and learns, uses tools, makes decisions for itself for its own well-being.
in the end, i had a testbed with person, zombie and shotgun.
all they had pre-defined in their brains were concepts of hunger and health. nothing more.
upon launching it, zombie realized it wants to feed, approached oblivious person, and started eating it.
at which point, purely out of how the system worked, person realized: "this hurts, the hurt is caused by zombie, therefore i hate zombie, therefore i want to hurt it", then looked around, saw the shotgun, inspected its class by reflection, realized "this can hurt stuff", picked the shotgun up, and shot the zombie.
remembered all of that, and upon seeing another zombie, shot it immediately.
it was a complete system, all it needed to become full-fledged thing was adding more concepts and usable objects, and it would automatically be able to create complex multi-stage, multi-element plans to achieve its goals/needs/wants and execute them. and the system was designed in such a way that by just adding a dictionary of natural language words for the concept objects on top of it, it should have been able to generate (crude but functional) english sentences to "talk" about its memories, explain what happened when, how it reacted, what it did and why, just by exploring the memory graph the same way as when it was doing its decision process... and by reversing the function, it should have been able to recieve (crude) english sentences that would make it learn what happened somewhere else in the gameworld to someone else, how to use stuff and tell it what to do, as in, actually transfer actual actionable usable knowledge to it...
it felt amazing to code for 14 hours straight, with no testruns during that, run it for the first time after those 14 hours, and see that happen.
and it did, i swear! while i was coding, i was routinely just realizing typos and mistakes i did 5-20 minutes ago, 4 files/classes ago! the kind you (and i) usually notice only when you try to run the thing and it bugs out.
it was a transcendental experience.
and then, two days later, i don't remember anymore what happened, but i lost all of that code.
and since then, i never mustered enough strength and resolve to try and write the whole thing again.
... that was like 4 years ago.
i hope that miracle will happen again one day...3 -
I’m playing around with packet analyser libraries (particularly pcap) and I have to say, it is fucking awesome and I’m becoming obsessed.
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I know this is not StackOverflow but is there a way to send TCP packets using JavaScript? I can't find a pretty solution. Why I can't find an API like "sockets" from Python to JavaScript?
Telnet API will be fine too.
Thanks!3 -
Technical question that I just cant find the answer to anywhere.
I have a load balancer and want it to pass the IP of the original caller to the server. Usually it is done by modifying the header? of the Request HTTP packet? and adding X-Forwarded-For: ....
The LB team though says it needs to modify X-Originating-IP and somehow causes a noticeable impact of the speed of all requests.
I don't know the details but it should only modify the first Packet that has the HTTP headers and should be appending X-Forwarded-For. If only need to modify the Header packet, how can it slow down the whole interaction so much:
-Adds 100ms to a 200ms request
-Increases a 10 minute download to like 20-30 minutes6 -
Just looking at someone who accidentaly reseted Final Exam Activity on Cisco Packet Tracer. Then i whisper on his ears.
"Try to read the dialog message. Never try to Slam every 'OK' button" -
So my future isp Jio fiber is rumoured to be using DPI. Main proof comes when a executive said "It’s called Deep Packet Inspection, and what you can do with the analytics of that is mind-boggling," in a new article. https://reuters.com/article/...
Should I be afraid or am I just being paranoid. Also should I just switch to another isp altogether if they are using DPI.
Also mini rant :- They make it harder to use your own router by not allowing bridge mode on their router and custom onts dont seem to work. The best option is to connect lan port of their router to the wan port of your router and disable wifi on their router3 -
not a rant.
More coronavirus doomporn so click away now if you're sicking of reading and hearing about it.
As I wrote to sweetnothings and Demolishun over here https://devrant.com/rants/2476697/...
Looting already started in my area.
Store was robbed in broad daylight after it was broken into just a few days ago.
And when the next surge of stimulus money hits people are gonna be like "I better stock up seeing as the shelves are kinda empty."
And then the shelves are gonna empty *quick*.
And people will see that and empty them *even faster*.
And then even faster than *that*, in a vicious cycle.
At some point people might panic and proper looting could begin.
Got my tax return before any stimulus so I took the time to go shopping.
Of course I didn't buy up all of any one item. Don't know why people feel like they need to do that.
Why wouldn't you want a variety of supplies anyway?
Gravy for example. No one can get any meat. Saw that coming a month ago.
If you're just buying for bulk, packet gravy is nice for things like pasta and staples like rice and potatoes.
Little things go a long way.
And salt. Salt is cheap now. Probably will remain cheap, but expect panicking buying to make supply spotty, like
everything else.
I expect these shortages to last 2-4 weeks, excluding things like dairy and meat which *could* go on longer.2 -
Wow, I'm such impressed by the power of Visual Studio with Team Collaboration, DB Management and this impressive packet manager... But it's like "don't try to understand, just code"
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I have to take UDP and add packet ordering, filter in, and resend and some form of handshake, because client couldn't figure out how to change the port from UDP to TCP and refused any help1
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I don't know if many rememeber me but at one point this year I had to turn UDP basically into tcp, handshake, packet ordering, resend on failed, ACK response, and 4k bit aes encryption. Fucking done, it works, signed the last version and pushed to client, client loved it, just what he wanted, paid out contract then turned around and asked me to setup his server for one day with no further expectations and an extra 250, said sure don't mind, as I am setting shit up I decided to test if his business isp really blocks tcp, guess what? NOPE IT WORKS JUSY FUXKIJG FINE AND I COILD HAVE KUST RIPPED A PREMADE CORE AND GOT PAID AND SET IT UP AND HE WOULD NEVER know, but maybe theirs some weird circumstances that require the core to be made only with udp, so after I was done I asked why only udp if his line allowed tcp? Requirements maybe? NOPE HE JUST DOSENT UNDERSTAND TCP FUUUUUUUQQQQHDJDIOAJEJDICJDNXIKZMZJDJCU2
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Story time!
I spend few hours last Friday debugging piece of code I wrote. It was based on working code, also authored by me. It was stuff for sending some data to transmitter, all in Python, nothing horrible or tough.
I wasn't able to understand, why older piece of code works (e.g. data are transmitted) and newer don't even when function bodies were same (I was desperate, so I copied-pasted my own working function there). Both function were in same file, bot syntactically correct, newer one was definitely running but still no transmigration from there.
And then it came, enlightenment at Friday afternoon. I forgot to actually push my prepared packet to radio. Older one was encapsulated in transmitter function and newer one wasn't. I was so focused on possible error in packet creation I forgot to send it?! Seriously?! Unfortunately yes.
Moral of the story? When debugging something, try step back (or up in my case) for a while. -
We have Python. A very fast to use language.
We have a package warehouse with a lot of packet, PyPI.
Why for the rage of the Gods the upload procedure of a new package to PyPI need to be so LONG and not easily understood??2 -
We had C project in school about multi-process communication and syscalls. We worked in groups of three.
I made a "framework"(header file) with important prototypes and definitions of needed variable sizes.
One of group member decided to null his variable by bzero syscall (writes null bytes). He ignored my framework and typed literal "sizeof". Ofc nulled double the needed value and it nulled another variable with some TCP packet also.
Spend week trying to find what is wrong with it.
I hate group projects. -
Lead dev asks me to take on the restful api aspect to a new internal tool UI I have been building. Happy for the challenge, I spend the 4 days (half of that in my own time), writing out 1k lines of C# that I endeavoured to keep clean, thoroughly decoupled and something I can be proud of.
I give regular updates.
This morning he responds to my last update “we already have most of that code in place”.
This stuff happens a lot. Back of a fagpacket planning and then cries all around when it INVARIABLY goes wrong.
Does this kind of bullshit happen in a properly organised, Agile team? We are about to take on a huge project and frankly I want to save myself the ballache and go find a well oiled team if what I am witnessing isnt just how things are in software land, but as I rather suspect a product of lack of communication and organisation.1 -
A completely technical observation.
When I was out in a bar the other night, I watched someone play a poker machine, and it dawned on me, Poker machines haven't been adjusted for inflation.
20 years ago if you won 5 quid, it may have bought a round, but now you would be lucky to buy a pint with 5 quid.
I can still beat the machine myself, I thought it was interesting that there is less of a payoff for any coin you spend, so much so that it looks like a rip off.
I used to hate seeing guys throw their entire wage packet into machines on a Friday night.18 -
I have several stories from the same mentor. Programming, networking etc...
2 of my biggest lessons from him:
1. "If it has to be done more than once, it can be scripted".
2. "He who controls the network packet wins". -
One of the top annoying behaviors of interested hiring parties is recruitment agencies cold-calling you, as if you're a disposable packet of Skittles! It's outrageous!2
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I'm working on a project which monitors streaming videos from several Rasp Pi devices wirelessly. Should packet loss occur, the bitrate is reduced remotely by the central computer. (Packet loss is inevitable as wireless devices will compete for wireless bandwidth.)
To demonstrate my work I asked for a wireless WI-FI router rather than bringing one in from home. I wish I hadn't bothered...
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A DHCP packet walks into a bar and asks for a beer. Bartender says, "here, but I’ll need that back in an hour!"1
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Do you hand craft each IP packet in binary before you send it out through the network? No. Who cares. We're computer scientists and the entire field is built on layers upon layers of abstraction.
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Hey there!
If some of you could maybe answer me a question about iptables, that would be great. Link to the full question below.
To summarize it, I have a sub-chain which matches packets using hashlimit and if this traffic is below 100 pps from that IP, it returns back to the INPUT chain, else the packet is dropped.
There is only one thing I don't get, the rule in the INPUT chain which jumps to my sub-chain matches a lot more packets then all my sub-chain rules together! Where do these packets go? It's like they don't match anything after that jump.
I asked this question on serverfault so here goes the link: https://serverfault.com/questions/...4 -
I vaguely remember some joke about how difficult networking is and how some Jeff Atwood blog post I think makes the comparison about analogy of sending actors in a taxi to somewhere being compared to a packet, anything can happen inbetween but you will get the packet or something indistinguishable from the original at the other end if all goes well.
Are occasional/intermittent 503 service unavailable or 504 gateway timeouts unavoidable for microservices calling another external microservice?
Like at that point isn't receiving a 503 or 504 from something else, somewhat outside my jurisdriction, albeit I am fucked if I am depending on them and need to fail gracefully.3 -
Is there anyway to post a data to a apache server without using headerless data? (A http packet without headers, just raw data string)
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