I think that it is too cumbersome to edit the network card file every time you add the nat rule. Can you add the iptables nat rule of the web interface in future versions to manage or provide the network card file modification channel or other means to simplify the nat port rule configuration? thank you very much!
Please file a feature request at https://bugzilla.proxmox.com/ and report back the ID so that others can track the issue.
I submitted a request whose address is https://bugzilla.proxmox.com/show_bug.cgi?id=1805