[SOLVED] Proxmox and VM over NAT

[gabriel-joy]

Proxmox has multiple VMs with their own IPs used successfully to connect to an external Wireguard server and to internet.

The exception is one of the VMs is configured to use NAT in such way to access the internet and the Wireguard server.
The VM over NAT successfully connects to internet but does not connect to the Wireguard server and I don't have any clue why.

Here it is the Proxmox interface, any ideea? Do I need to specify something about the Wireguard UDP port?

auto vmbr10
#private sub network - nat on proxmox

iface vmbr10 inet static
address 192.168.10.1/24
bridge_ports none
bridge_stp off
bridge_fd 0

post-up echo 1 > /proc/sys/net/ipv4/ip_forward
post-up iptables -t nat -A POSTROUTING -s '192.168.10/24' -o vmbr0 -j MASQUERADE
post-down iptables -t nat -D POSTROUTING -s '192.168.10/24' -o vmbr0 -j MASQUERADE
post-up iptables -t raw -I PREROUTING -i fwbr+ -j CT --zone 1
post-down iptables -t raw -D PREROUTING -i fwbr+ -j CT --zone 1

 

[gabriel-joy]

I guess I was too tired, the wireguard public key was different on the server side... sorry

 

[Code-Exec]

I know it not solve your problem, but I think to manage NAT more comfortable with my patch - https://forum.proxmox.com/threads/proxmox-nat-on-gui-for-everyone.82323/