@Pinki This sounds like a layer 7 firewall is in between FOG server and the client/host. Sometimes alles the transfer of init.xz but more often blocks it.

The later error is due to the firewall not allowing connections on random network ports which are used by NFS.

Either way you need to talk to your network/security team and see if they can help.

hello,
I couldn’t find a solution to unlock my situation, I tried many things on promox and on fog, without succes again. So I decided to start a new install on another post, separated from the proxmox and it’s working fine. I think I’ll keep this solution so, thanks for your help and sorry to leave an unsolved issue, see you later !