Pretty standard in the world of VoIP these days, really, but at the time I was new to the technology and the feeling I got when 6 different call centers with a combined 120 agents called me within 5 minutes to complain will always make my stomache turn...

In short, about 10 years ago, I hosted slightly cumstomised instances of something called ViciDial. It's call center software. I neglected to implement DOS protection. And a botnet started trying to brute force REGISTERs to the SIP service. It completely clogged up the measly 100Mb pipe I was renting out of the data center.

I had no KVM. No remote reboot. No external firewall. Stupid, stupid - stupid!

I just sat there for 2 hours until they finally finished.

..ugh