Looking for a way to generate an encrypted string (with salt) in C++ then send that string over to a java server and decrypt it on java as well. Any suggestions?

Question about linux iptables. I am currently blocking all access and whitelisting only when my users launch my software. When software is launched a socket client is also launched, it connects to socket server, identifies itself with a password and disconnects. If given password by socket client is correct, then socket server whitelists the users IP by executing the following command: " iptables -I INPUT -s userIP -j ACCEPT".

My problem is that now I have lots of duplicates of IP's whitelisted and as far as I've heard I should not go over 25k iptable rules.

So my question is how to check if ip is already whitelisted, in order to avoid duplicate iptable rules for for same IP?

Obvious solution would be to store whitelist somewhere (mysql/txt) and double check before whitelisting ip, but maybe there is an easier way to do this?

Question about sockets in java. I have one socket server and multiple socket clients connected to that socket server. How to communicate between socket clients when they connect to same socket server? Is there some neat library to handle that socket server/client interactions? Googled for hours cant find a decent solution

Need help with selecting a proper backend and website frameworks. After trying out a couple identity verification service providers we were dissapointed with their lack of support (takes weeks to do minimal changes).

So now we are having discussions about building in-house id verification system. We already have libraries for ios/android apps (ZOOM lib for face recognition and another lib for data extraction via OCR from document picture). So what we need is a proper backend and then a decent web framework with proper ux/ui design for our web/ios/android apps.

Currently thinking what kind of backend framework should we choose? Backend's main responsibility is for each client registered from website to assign an api key and to create a database/storage where his users would authenticate via clients app and upload a picture and a video.

Also wondering what kind of framework for website apps (main web app, dashboard app where we display pending verifications, and of course verification app) to choose. Should be go for angular?

Looking for best windows laptop currently available with decent cpu and cooling system for gaming and development. Any ideas?

Attention: incomming resentful boiled up for months rant.

Hands down G2APAY is the worst because:

Merchant account aproval takes fcking months. It starts with unreasonable delays in documents approval. I mean insane nitpicking. They want to see merchants name surname and address on every god damn document that you submit even if for example bank statement doesnt include these details. I had to manually edit pdf’s just so that they would fck off and approve the merchant application. Insane requirements for document check also combined with their email only support answering only once a week you will have to wait one month just to get your account approved.

Then you get to the fun part, approval proccess for vendor gateway and webhook integration. They are nitpicking everything you can imagine: about website not having https, website forum missing some icons, merchants phone number being from another country then he is, and bunch of other hundreds of problems imagined only by them. Again combined with their one email reply per week policy you will waste atleast one month to finish up your integration.

Now finally you are their client and you think you can chill and go back to focusing on your business? Nope bro. Prepare for threatening emails. Last time I got a request to install https or my merchant application will be shut down. I was given 3 days notice on a fcking friday and had to do it.

Then g2a backend is crashing quite often. Combined with their one email per week policy you are fcked in the ass if your users were not able to pay through g2a and you will get no compensation.

Their backend documentation is shiet. Not clear how to integrate everything and after you integrate they make changes without publishing any changesets. Your integration is working? Good luck if it will still be working tomorrow.

And the very worst part is that they stopped proccessing credit cards like month ago with zero notice. Its been weeks and still zero news about bringing card proccessing back. They sad that they were acquired by some other company so shitty support got even shittier now while they are in a proccess of handover.

So yeah thats the worst vendor I have ever seen in my life. For example integrating paypal took me 30 minutes. Integrating stripe and getting all documents reviewed took me one business day. Same with paymentwall integration and document approval took 1 business day. Support is amazing and even have a phone number that I can reach if urgent problems arise. Thats how it should be. Thats why I can pay percentage of my transactions with a smile for them.

Sorry for the typos since im typing on my shiet phone while driving.

Eat a bag of dicks g2apay. I hope you go bankrupt and shutdown.

Need advice about protecting ddos via iptables and whitelisting. Currently I launched my gameserver and am fighting against a massive attack of botnets. Problem was solved by closing all ports on my gameserver linux machine and shipping game.exe with injected c++ socket client. So basically only gamers who launch my game exe are being added to firewall iptables via the socket client that is provided in the game exe. If some ddosers still manage to get inside and ddos then my protection is good enough to handle attacks from whitelisted ips from inside. Now I have another problem. Lots of players have problems and for some reason shipped c++ client fails to connect to my socketserver. Currently my solution was to provide support in all contact channels (facebook,skype,email) and add those peoples ips to whitelist manually. My best solution would be to make a button in website which you can click and your ip is whitelisted auromatically. However if it will be so easy then botnets can whitelist themselves as well. Can you advice me how I could handle whitelisting my players through web or some other exe in a way that it cant be replicated by botnets?

Looking for a decent payment provider. I have been using paypal for now but tired of refunds from kids and scammers. Tried out g2apay, paymentwall but they dont accept credit cards. Thinking of stripe. Can you advice any other ones?

Are there any sysadmins here who know how to deal with ddos attacks properly? I can even offer pay. Situation is that I launched my java app (gameserver) on linux debian and configured iptables to allow only specific ips. Basically I made only 1 port open for loginserver and if player logins into loginserver it adds his ip to iptables so hes able to proceed to gamesever. However I am still receiving massive up to 900MB/s attacks for example: http://prntscr.com/q3dwe8

It appears that even if I left only one port open, I still can't defend against ddos attacks. I made some captures with tcpdump and analyzed them on wireshark but to be honest I cant really tell what I'm looking at.

I am using OVH which is supposed to be ddos protected but maybe I messed up during iptables configuration, I'm not sure.

Can anyone help?

I need some advice on how to separate workstations. Currently I'm working with 6 projects at the moment and sometimes I use my PC, sometimes win laptop, sometimes macbook and it has become a mess.

Ideally I would like to have separate windows/mac instances where I could have project specific stuff installed. Having different windows accounts is not an option since I'm not sure if I will be able to multitask between projects effectively. Separate windows desktops also is not good enough for me. Buying multiple PC's as well. Maybe some cloud solution would be the way?

Can anyone advice on this?

As an android dev when I inherited a shitty project thats when I realized what really means to write readable and most importantly testable code. Codebase I inherited wasnt even really that bad it was quite readable, but boy it was not suited for any unit/instrumented tests. im talking spaghetti code.

Nowadays I refactor apps to make sure they are testable instead of spending weeks writing tests for a shitty codebase which was done without thinking about separation of concerns. Clients hate the extra couple weeks on top of request but what can I do, if they want tests they need to work with TDD approach or give extra time for refactors.

hey guys i need your advice about backend integration for android. I have this junior and I want to teach him about integrating REST API and handling it with volley+caroutines or retrofit+rxjava. currently the junior is using firebase for authentication and firebase realtime db for all CRUD operations. problem is that by using firebase backend the junior won't learn networking/multithreading stuff. Is there a way to use firebase realtime database like a REST API?

Dont work in the place where pm doesnt have tech background

Question for data science people. Do you know some good multi purpose self tracking platform? Something like exist.io but more advanced? I want to setup custom tracking

With firebase, is it possible to see events in realtime? I know how to debug on my device via DebugView via adb. But I want to distribute a test build to my client and I want him to be able to test events himself. I saw there is a StreamView but it allows to only select a snapshot of random user. I need my client a way to be able to test the debug build on his device while being able to see events in realtime, like for example it's being done in Segment. Is there a way to do this in firebase?

In slack, can employer see private messages between employees in company workspace?

Hey guys. I need your advice about writing a documentation. I want to make a flowchart with all processes of this client’s mobile app so I could see the UX logic and also all UI screens in the app. I also want to somehow add backend info in order to see which endpoints are being called in these screens and what type of responses are we parsing there.

Currently flowchart is done in draw.io, some of sketches are in zeplin, and there is 0 backend documentation just some implementation in our mobile app.

I would like to combine all of this into some useful document/overview so I could pass this doc to a junior dev and he could jump working into project without a problem.

Do you know any tools to do this?

Now I have 6 projects on JIRA and I have lots of data collected from all projects (for example visitors on website, how many of them donated money in our project and etc.).

I am looking for some software/app where I could import lots of data from these reports and I want to be able to compare datasets or see some overview.

What should I use?

Have a question about git rebase with android studio.

So I have a feature branch which I finished working on, I made a pull request to develop branch and now I see many conflicts because develop is few commits ahead.

In android studio I switched to my feature branch, then did a git rebase develop and resolved all conflicts. After conflicted files were fixed I did a git add conflicted_file and continued with git rebase --continue until the end.

Now everything is finished. I have a local feature branch that was rebased to current develop, and I resolved all conflicts.

Problem is when I do a git push to my remote feature branch, I get a merge conflict error conflict from android studio and now I have to solve all merge conflicts yet again for some reason.

What I am doing wrong?

How do you deal with situation when u need to merge multiple feature branches to develop branch? All feature branches have develop branch as base. So as soon as one feature is merged to develop then there will be contlicts in other feature branches.

Should I merge first feature branch to develop, then rebase feature2 branch on most recent develop and then merge the rebased feature2 branch to most recent develop and continue like that?

What if later I need to do hotfixes for previously merged branches? Should I revert them then rebase them on most recent develop and once again merge it to develop? Or should I just make small commits for fixes.

Need a backend advice. I have a php webhosting with a mysql database and im looking for a simple REST API backend solution so that my android app could fetch data from mysql via api. Any suggestions?

Best tool to manage multiple software projects? I have like 5 of them at the moment and I'm the only one working. Already tried JIRA, Trello but one seems like an overkill and trello is too simple.

Hey guys,

I need some help with reviewing a service agreement contract from a french startup where I am the service provider/freelancer living in my own country in Europe where they will open an office. Ideally a french person who knows about freelancing contracts in France.

Hey guys,

I need your advice about deciding wether to work as a freelancer for a startup or no.
So this French startup is couple years old and they decided to build a team in my country. I went to the interview few weeks ago and we discussed the projects, details, potential salary and everything seemed great.

Couple days ago I received a service contract from them and now I need to decide to work for them or no.

Plan is for them to come to my country, rent an office and I should go there and work for them.
The salary that they offered is medium level and they will not have any legal entity in my country. However it’s not a problem for me since I have my own LTD company so I would pay salary on my own.

However there are some cons:

My team members are being hired as freelancers, however salary is defined with a daily rate instead of hourly and we are allowed to work maximum 20 days a month. It is not clear how many hours a week/month they will expect us to work and at this point I’m afraid to rock the boat with my questions. I understand that I shouldn’t receive any health insurance, sick leave pays, vacation days, home office, pension contributions and so on. But it’s so weird that they pay per day instead of per hour. It screams with unpaid overtime.

Payment time is 30 days after invoice has been sent. So If I started working from September 01, I will send them invoice at September 30, then I will work all October and will receive my money only around end of October. Working 60 days to receive my first salary doesn’t seem nice.

Notice period is 30 days. Which is fine on my end since I can be completely free after initial notice. But in their case if they want to fire me I guess they will simply not give me any work to do and since I’m charged per day I won’t be able to send them any invoice. No employment safety, which means if after 2-3 months they don’t have anything to do I can get royally screwed. But it’s startup nature I guess?

They don’t provide a laptop to work with. I’m lucky since I have a laptop for developing mobile apps, and they said they will at least provide office to work in and a monitor.

All this situation is sending vibes of "we want to save money so we came to your country for cheap labour and now we gonna exploit you"

What complicates matters is that my sister will be working with me and It’s her first job. They agreed to pay her a decent salary and even be flexible with her studies. However this deal for me does not seem too great as I will be receiving mid level salary with no benefits that I would otherwise get.

On the other hand maybe I'm just overthinking this I can just try it out for few months and see where it goes.

Any thoughts?

Today I tried medication (concerta 36mg) for my ADD for the first time in my life (im 26 years old).

Result is fuck yeah! I feel like a human being whos able to focus on shit. Im so jealous of normal people having a decent attention span and decent working memory.

Are there any fellow devranters who have shitty working memory and have trouble focusing? Basically people who have ADHD/ADD? I got into programming because I love solving problems and am able to hyperfocus for weeks on projects, but outside of work life seems to be a mess :/ Can't even remember simple facts if they don't interest me (don't have that much dopamine).

Could you share some advices on how you managed to treat ADHD/ADD or basically improve your memory?

I mean there is the obvious: sleep, exercise, good nutrition (cutting out dairy, sugar, caffeine, alcohol, smoking).

But maybe there are other ways to do this without using drugs such as ritalin/concerta?

What kind of facts should every person know? I mean in todays modern world some ppl live so deep with heads up their asses that they dont even know how many continents in the world there are.

And sadly it makes sense, who needs all that data in their head when the info is one google search away?

I myself cant retain facts of real world at all. Recently went to some quiz competition and felt stupid af.

On the other hand all these ppl who know a lot about world usually have shit retail jobs. So is knowing more facts than white collar professional some weird mental flex?

I know how to build mobile apps (design and apps themselves).

I want to open a small services company, but I realized that I will need a website with portfolio of the jobs I did. Im working on gathering a portfolio, but have no idea how to make a proper website for representing my services.

Popular choice seeems to be getting a wordpress theme for $50-$60 modifying it and that's all. Is there a better way to do this and look professional without hiring a web dev?

Anyone knows of a good MX (email service)?

I recently protected my webhosting with cloudflare, now just looking for a separate mx server because the current one is exposing my website's real IP

Hey guys. I need some help setting up cPanel on two centOS VPS. I want main vps to act as main cpanel vps (with ns1) and secondary vps to act only as ns2. Anyone knows of a good tutorial? I've searched a lot but most of provided tutorials are incomplete. They don't explain how to park your first domain to WHM and how to setup nameservers