We have a FWSM module in 6513 core switch which acts as the gateway between Vlan's.
We have an exhange server in one VLAN and now we face a connectivity problem to this server on port 25 from other VLAN's. The port is open and no restrictions are there from Acces-lists.
When we do a telnet to the server on port 25, we are not able to see the banner which exchange server returns as response and no response from the command which we type in as well. Ex: helo, mail from: firstname.lastname@example.org, etc.,
The asterisk'd banner is due to the SMTP inspection in the FWSM. Turn off "inspect smtp" or "fixup protocol smtp 25" depending on what version you're running (3.x or 2.x respectively), and see how you go.
Thanks for the reply. I tried that on the other day and was able to see the reply. But I have a question, the fixup command should be restricting only the packets which has the commands other then those which are not part of the standard commands right? Why does this block legitimate commands as well? Do reply if you have time. Once again thanks for taking time to reply to the earlier query.
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