Score:0

How to limit UDP port range with K8s + Calico + Wireguard

id flag

We have several Kubernetes clusters at Hetzner using Calico (vxlan) with security enabled (Wireguard tunnels). The recent Hetzner outages knocked everything offline:

Due to always different destinations (IPs, ports, packet size) we unfortunately had to limit this traffic. This concerns UDP traffic on port 9000-65535.

Is it possible to configure Calico to not use UDP ports from 9000-65535? Is this likely to help?

mangohost

Post an answer

Most people don’t grasp that asking a lot of questions unlocks learning and improves interpersonal bonding. In Alison’s studies, for example, though people could accurately recall how many questions had been asked in their conversations, they didn’t intuit the link between questions and liking. Across four studies, in which participants were engaged in conversations themselves or read transcripts of others’ conversations, people tended not to realize that question asking would influence—or had influenced—the level of amity between the conversationalists.