Anyway to "redirect" SMTP traffic?

You can do this w/o creating an irule.

 

 

As long as the F5 itself can reach the SMTP server on the network, then you could create a VS on port 25, create a pool with the SMTP server (you can do this w/o the SMTP server behind the F5) and then apply the autosnat on the VIP itself.

 

 

I.E.

 

You have a VIP 192.168.12.90:80 and 192.168.12.90:443 for OWA. For SNMP you can do 192.168.12.90:25.

 

 

What happens is that when a server sends SMTP to the virtual address it will forward it to the SMTP server using the LTM's routing table. The autosnat basically ensures the return traffic cross back through the F5 to complete the communication path. Without autosnat the Client who send the SNMP would drop the response packet because it expected it from the virtual address not the SMTP server address itself/.

 

 

I hope this helps

 

 

CB