Connect failed: connect: Connection refused; Connection refused (500) *SOLVED* this issue was solved by running Code: pvecm updatecerts see 2-nd post. --- Hello I have a server which had been running Proxmox 2.0 since December. according to aptitude logs it originally had proxmox-ve-2.6.32 2.0-53 . the node name is fbc241 . Today I backed up and removed the vm's and added fbc241 to the cluster. here is pvecm status and nodes: Code: fbc241 s012 /var/log # pvecm nodes Node Sts Inc Joined Name 1 M 196 2012-04-16 06:38:08 s009 2 M 196 2012-04-16 06:38:08 fbc246 3 M 196 2012-04-16 06:38:08 s002 4 M 188 2012-04-16 06:37:42 fbc241 fbc241 s012 /var/log # pvecm status Version: 6.2.0 Config Version: 19 Cluster Name: fbcluster Cluster Id: 52020 Cluster Member: Yes Cluster Generation: 196 Membership state: Cluster-Member Nodes: 4 Expected votes: 4 Total votes: 4 Node votes: 1 Quorum: 3 Active subsystems: 5 Flags: Ports Bound: 0 Node name: fbc241 Node ID: 4 Multicast addresses: 18.104.22.168 Node addresses: 10.100.100.241 The problem is on the pve screen, when I try to click on fbc241 this error displays: "Connect failed: connect: Connection refused; Connection refused (500) " Other issues: from other nodes ' ssh fbc241 ' requires a password, even when trying 'ssh-copy-id ' . /root/.ssh/ :has authorized_keys -> /etc/pve/priv/authorized_keys but if I copy the original authorized_keys back ssh login does not need a password. In the past when I ran into this problem a reinstall is the only solution I could find. But it would be good to try to fix this issue incase anyone else runs in to the problem. Any suggestions? ps: thank you for the great Proxmox PVE system.