Hello, I have a strange problem. I have a cluster running in a datacenter (Hetzner), and I'm monitoring it with Checkmk. The Checkmk server is also running at Hetzner; previously, it was running on a private IP for 10 days. Since I migrated, I am no longer able to ping or access the node from the monitoring IP, but every other IP works fine. I have configured the cluster-wide firewall, and both other nodes work fine. Using
this is a part of the output (I removed DNS names):
As you can see, the server receives the packets but is not responding. I have no specific firewall rules regarding this IP, only that port 6556 is allowed cluster wide. Pings are allowed from everywhere. The Pve-Firewall log files are empty. Thanks in advance
Code:
tcpdump -i eno1 icmp
Code:
11:25:51.748124 IP monitoring > node1: ICMP echo request, id 7945, seq 0, length 64
11:25:52.753670 IP monitoring > node1: ICMP echo request, id 7945, seq 1, length 64
11:25:53.758642 IP monitoring > node1: ICMP echo request, id 7945, seq 2, length 64As you can see, the server receives the packets but is not responding. I have no specific firewall rules regarding this IP, only that port 6556 is allowed cluster wide. Pings are allowed from everywhere. The Pve-Firewall log files are empty. Thanks in advance