It all started with an undelivereable e-mail.

New manager (soon-to-be boss) walks into admin guy's office and complains about an e-mail he sent to a customer being rejected by the recipient's mail server. I can hear parts of the conversation from my office across the floor.

Recipient uses the spamcop.net blacklist and our mail was rejected since it came from an IP address known to be sending mails to their spamtrap.

Admin guy wants to verify the claim by trying to find out our static public IPv4 address, to compare it to the blacklisted one from the notification.
For half an hour boss and him are trying to find the correct login credentials for the telco's customer-self-care web interface.
Eventually they call telco's support to get new credentials, it turned out during the VoIP migration about six months ago we got new credentials that were apparently not noted anywhere.

Eventually admin guy can log in, and wonders why he can't see any static IP address listed there, calls support again. Turns out we were not even using a static IP address anymore since the VoIP change. Now it's not like we would be hosting any services that need to be publicly accessible, nor would all users send their e-mail via a local server (at least my machine is already configured to talk directly to the telco's smtp, but this was supposedly different in the good ol' days, so I'm not sure whether it still applies to some users).

In any case, the e-mail issue seems completely forgotten by now: Admin guy wants his static ip address back, negotiates with telco support.
The change will require new PPPoE credentials for the VDSL line, he apparently received them over the phone(?) and should update them in the CPE after they had disabled the login for the dynamic address. Obviously something went wrong, admin guy meanwhile having to use his private phone to call support, claims the credentials would be reverted immediately when he changed them in the CPE Web UI.

Now I'm not exactly sure why, there's two scenarios I could imagine:
- Maybe telco would use TR-069/CWMP to remotely provision the credentials which are not updated in their system, thus overwriting CPE to the old ones and don't allow for manual changes, or
- Maybe just a browser issue. The CPE's login page is not even rendered correctly in my browser, but then again I'm the only one at the company using Firefox Private Mode with Ghostery, so it can't be reproduced on another machine. At least viewing the login/status page works with IE11 though, no idea how badly-written the config stuff itself might be.

Many hours pass, I enjoy not being annoyed by incoming phone calls for the rest of the day. Boss is slightly less happy, no internet and no incoming calls.

Next morning, windows would ask me to classify this new network as public/work/private - apparently someone tried factory-resetting the CPE. Or did they even get a replacement!? Still no internet though.
Hours later, everything finally back to normal, no idea what exactly happened - but we have our old static IPv4 address back, still wondering what we need it for.

Oh, and the blacklisted IP address was just the telco's mail server, of course. They end up on the spamcop list every once in a while.

tl;dr: if you're running a business in Germany that needs e-mail, just don't send it via the big magenta monopoly - you would end up sharing the same mail servers with tons of small businesses that might not employ the most qualified people for securing their stuff, so they will naturally be pwned and abused for spam every once in a while, having your mailservers blacklisted.

I'm waiting for the day when the next e-mail will be blocked and manager / boss eventually wonder how the 24-hours-outage did not even fix aynything in the end...

A recent post by someone else regarding dial-up made me wonder: Why did it have that specific, trademark noise when connecting?? What was the purpose of that? It's not like it was useful or anything, right?

(a slide acoustic guitar plays on the background and the cowboy starts speaking)
It was a dry october day, back in good old 2017. I had this job from a client that I never met and was doing some coding for money.

After days of no sleep, no food and no rest, I finally decided to take a nap so I paused my music.

It was at this moment I found out my machine was making funny noises. Like a dingo makin' a run from it's enemies with a whelping noise.

Clicked on my computer and tried to find an ol' file from the archive drive but the machine won't let me, sayin' the disk ain't ready yet.

I tried disk manager, disk scanner, whatever the tools at my disposal all in vain. Then I said what the hell, I'll just restart my machine and it'll be alright.

The machine rebooted but the disk was gone. It was dead like a deer I ran over. I was upset, but not aware of the calamity headin' my way.

In just a few days my other 2 disks died suddenly. The loss of data, all the effort, none of them mattered. I felt numb and decided it was time for a fresh start.

Plugged in a Windows install disk, started the sequence, a screen came up askin' me which damned and alive disk I wanna install the fresh OS. I had two same make and model SSD disks, chose the one thinkin' it was the Windows drive, hell it wasnt... It was with all "my documents", "downloads", "pictures" folders and now I had two SSD drives with two Windows installations and nothing else.

The folks in town took a dab at me for months, even the bartender of the salloon refused to give me a drink. Sayin' it was a matter of reputation...

Turned out the bastard who fried my disks was the Madde Dog PSU Tannen who had a bad temper so here I am, tellin' my story to milk breathers and cherishing old days of data...