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SMTP. Sonicwall ES and ISA 2006 Back to Back - 20.Aug.2007 4:09:10 PM

WebiFied

Posts: 12
Joined: 6.Aug.2007
Status: offline

I am running a back to back ISA 2006 configuration and am trying to implement Sonicwall Email Security on the back end server. So far I am not having any luck.

I created an SMTP server publishing rule on the front end to forward SMTP to the back end. This seems to be working. The SMTP server publishing rule that I created on the back end was being ignored so I created an access rule to allow SMTP. SMTP gets through now. I can telnet to port 25 from the outside. I get the Sonicwall SMTP banner but the connection is dropped immediately.

Any ideas? Does anyone have any experience getting Sonicwall ES working in this type if configuration?

Thanks.
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RE: SMTP. Sonicwall ES and ISA 2006 Back to Back - 22.Aug.2007 9:42:00 PM

WebiFied

Posts: 12
Joined: 6.Aug.2007
Status: offline

I figured this out on my own. In order to get this working, I had to create a publishing rule on the back end server to handle inbound SMTP from the front end AND a network rule on the back end to handle outbound SMTP on the localhost. The two work together apparently to make this work. Not sure if I understand why it works but it does work.

Any feedback?

Thanks.

(in reply to WebiFied)

Post #: 2