[SOLVED] No SSH and Web-GUI connection from non-local subnet

Jul 24, 2026
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I cannot manage PMG after my admin PC ip address change. I can use SSH and Web-GUI access from a PC in the same subnet. (The routing table is equal on PMG and the second PC).
Tcpdump shows the initial packets are coming to PMG but no outgoing packets at all. It looks like a packet filter job on PMG site but I cannot find.

pmg-api/8.1.2/c979cfd1d78a (running kernel: 6.8.8-2-pve) (iso installation)

Thanks for your help
 
It looks like a packet filter job on PMG site but I cannot find.
PMG does not ship any packet-filtering/firewall by itself (see https://pmg.proxmox.com/pmg-docs/pm...ation_into_existing_email_server_architecture).

but you can check the usual firewall/packet-filtering software on linux - if you/someone else deployed a firewall there:
* nft list ruleset
* iptables-save

. (The routing table is equal on PMG and the second PC).
please share the routing table - and the journal - maybe those have some pointers why something is not working

else - check the enviroment (if PMG is running as VM/LXC-container - check the hypervisor firewall, and in any case check your firewall's configuration)

I hope this helps!