[SOLVED] Unable to NAT (port forwarding)

[RikiTee]

Hi guys,
I'm new to Proxmox and I'm sorry to ask for a topic already treated several times, but I'm unable to forward ports (NAT).

This is the situation:
I've installed Proxmox for the first time on my home server to run some VMs for services like web server, cloud server, SQL server, etc...
I have only one physical network adapter (enp5s0) and a bridge one that Proxmox created automatically (vmbr0).
Vmbr0 has a static ip address (192.168.0.44) and it was successfully recognized by the router.

I paste the /etc/network/interfaces content:

auto lo
iface lo inet loopback

iface enp5s0  inet manual

auto vmbr0
iface vmbr0 inet static
        address 192.168.0.44
        netmask 255.255.255.0
        gateway 192.168.0.1
        bridge_ports enp5s0
        bridge_stp off
        bridge_fd 0

I have two VMs with static ip addresses and also they are recognized by router:

1. webserver (192.168.0.45)
2. mysql (192.168.0.46)

I'm trying to forward ports 80, 443 to webserver and port 3306 to mysql but I'm unable to do it.
I don't understand if it's a iptables problem, a firewall problem or other.
All Proxmox's firewalls are disabled.

Can anyone help me?
Thanks!

 

[RikiTee]

Hi, anyone can't help me?

 

[dcsapak]

i guess you do port forwarding on the router? if yes,
try to see (e.g. with tcpdump) if the packet reach proxmox, and the vms and if the ips/ports are correct

 

[RikiTee]

I have the Proxmox server in DMZ, so all ports are open.
I've executed "tcpdump -i vmbr0 -n dst port 80" and:

• if I call the port 80 from the LAN, I see a lot of tcp traffic;
• if I call the port 80 from the WAN, I don't see anything, no one tcp connection.

Note: from the WAN, the WebGUI of Proxmox it's perfectly working.

 

[RikiTee]

Sorry, my mistake.
I discovered that my router, for no reason, blocks the incoming port 80.
I've tryed with casual ports like 999, 123, ecc.. and it works.