vulpecula.uberspace.de IPv4 connection issues Thursday 25th June 2026 12:46:18

The host vulpecula.uberspace.de isn't reachable by IPv4 anymore, while IPv6 works fine. As IPv4 works fine for all other hosts, it's not yet obvious what's the reason for it. We spotted quite some DDoS attacks over the last days and suspect that the attack got bigger and our IP upstream might have temporarily blocked the IP. We're investigating.

vulpecula has been singled out onto its own cluster node in order to minimize affections. Adapted filtering rules are in place. Since 15:24 the measurements seem to be working well and connectivity for now is stabilized. Our upstream providers and us are keeping an eye on it.

Posted 4 hours ago by :username

Besides vulpecula itself, antares, crux and dorado are also indirectly affected as they share one cluster node. We're separating those VMs now.

Posted 5 hours ago by :username

Unfortunately we start seeing connectivity problems again. We're at it.

Posted 5 hours ago by :username

We're blocking the DDoS attack on our routers, and we also involved our upstream provider for additional protection outside of our network. For now we see stable IPv4 connectivity again.

Posted 6 hours ago by :username

DDoS indeed, we're seeing traffic flooding from many IPs to an unused port which we're currently seeking to firewall these packets away.

Posted 7 hours ago by :username

We're seeing IPv4 packets partially coming through which hardens the suspicion that the host vulpecula.uberspace.de is under a DDoS attack. Other hosts in the network seem unaffected so far.

Posted 7 hours ago by :username