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Block SMTP Traffic on SonicWall PRO3060 Enhanced OS

Posted on 2009-07-16
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Last Modified: 2013-11-30
On a Sonicwall Pro3060 with Enhanced OS, I need to block all smtp traffic, port 25 from going to WAN.  The only exception for that I need is for our e-mail server to allow for SMTP port 25.  I can't have workstations having ability to have SMTP enabled.

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Question by:fireguy1125
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CreditSoupTech earned 2000 total points
ID: 24869995
Just add an outbound rule denying from LAN to WAN Service SMTP: LAN-->WAN DENY 25
Then add a rule that allows LAN to WAN Source [Internal Mail Server IP] DESTINATION [ANY] Service 25: LAN-->WAN Source x.x.x.x Destination ANY 25

Is that clear enough?  
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by:fireguy1125
ID: 24870126
Thanks, I was putting in the Destination as "WAN Subnets".  When I changed it to ANY I tested and works.

I always get confused with all the Address Groups that SonicWall has.
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by:CreditSoupTech
ID: 24870220
Yeah. WAN Subnets is just your WAN address's or your public IP's assigned to the WAN subnet.
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Expert Comment

by:ethernet69
ID: 33378318
very helpful...thanks for the explanation.

Brian
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