Hello
We use here Novell GroupWise GWIA Servers.
It is not possible to change the SMTP Port to 26 on Groupwise.
So, we have found, that we can use 2 IP addresses on Proxmox.
first IP: for incoming traffic
second IP: for outgoing traffic
Then, we make a Prerouting on Proxmox, that all traffic to port 25 from the second IP is send to the port 26 from the first IP.
iptables -t nat -A PREROUTING -t nat -p tcp -d X.X.X.X --dport 25 -j DNAT --to X.X.X.X:26;
Regards.
Gustav.
We use here Novell GroupWise GWIA Servers.
It is not possible to change the SMTP Port to 26 on Groupwise.
So, we have found, that we can use 2 IP addresses on Proxmox.
first IP: for incoming traffic
second IP: for outgoing traffic
Then, we make a Prerouting on Proxmox, that all traffic to port 25 from the second IP is send to the port 26 from the first IP.
iptables -t nat -A PREROUTING -t nat -p tcp -d X.X.X.X --dport 25 -j DNAT --to X.X.X.X:26;
Regards.
Gustav.