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I am really curious if the DDOS tried to follow them to the new infra and failed to cause an outage or not. Apparently the perpetrator noticed when they got Cogent to narrow the null route, but the blog post notes they still can't access the original subnet in that datacenter. Are they still trying to knock Sourcehut offline? Is the DDOS still pointing at now deprecated infra for some reason?

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When they switched DNS over to point to the AMS datacenter, the DDOS attack followed it until it got smacked down by the OVH NAT.

> At about 06:30 UTC the following morning, the DDoS escalated and broadened its targets to include other parts of our PHL subnet. In response, our colocation provider null routed our subnet once again. This subnet has been unreachable ever since.

Right, that's expanding to the rest of the subnet in their old DC. They've since migrated to the new DC with new countermeasures. Did the DDOS follow and the countermeasures are working? Or if it didn't follow, why not?

There's also the question of whether the DDOS is still even trying the old infrastructure. The post says it's unreachable, but that would be true if the null route hadn't been removed yet.

Yes, the DDoS followed us to networks with countermeasures, and yes, the countermeasures worked. We don't want to disclose too much about that, though.

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