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The Graveyard - Products No Longer Supported => D-Link NetDefend Firewalls => Topic started by: jrobbins on February 23, 2009, 05:27:01 PM

Title: DFL-210 smtp blocking
Post by: jrobbins on February 23, 2009, 05:27:01 PM

Hello all,
My client has a DFL-210, and after a recent battle with malware, trojans, and now dns blacklisting issues, I would like to block outgoing smtp for everything but the exchange server. Is there possibly a step-by-step tutorial online, or could someone tell me how to do it? Thanks.

Title: Re: DFL-210 smtp blocking
Post by: Fatman on March 11, 2009, 09:23:33 AM

I am sorry, I somehow missed this thread before.

It is a 2 step process.

Create a rule matching the below template

Name: Allow_Exchange
Action: NAT
Service: SMTP_Outbound
Source: LAN/Exchange_Server
Destination: WAN/All_Nets

Then put below that rule a rule denying everyone else.

Name: Deny_Others
Action: Deny
Service: SMTP_Outbound
Source: LAN/Lan_Net
Destination: WAN/All_Nets

Both of these rules need to be above your default allow outbound rule.

Title: Re: DFL-1600 smtp blocking
Post by: denisjc on April 20, 2011, 11:33:45 AM

Please help

I have got an exchange server on LAN behind DFL 1600 firewall. my problem is i dont seem to figure out how to get mail sent but i am able to recieve mail.

how can i get this to work

Title: Re: DFL-210 smtp blocking
Post by: scrubsguy on July 21, 2011, 01:16:45 AM

first of all, create rules to allow the ports on exchange to access the internet...
or create IP rules to allow full access to the internet.. which ever you decide, but do you have a spam/antivirus mail scanner?

Title: Re: DFL-210 smtp blocking
Post by: danilovav on July 21, 2011, 09:34:57 AM

Check MTU