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RE: [FW1] SMTP RELAYING
Here's a basic setup for anti-relay:
Create/Edit a resource SMTP object.
Give it its name, color,etc. if new.
You can leave the mail server field blank (fw1 will resort to using
the original destination of the email)
In the match tab set sender to *
Set recepient to *@yourdomain.com
If you have multiple domains enter like so:
*@{yourdomain1.com,yourdomain2.com}
Set the other tabs...
Go to Policy->Properties
In the Security Servers tab, set your SMTP Security Server Welcome
Message
(Good to edit this, by default it reports itself as FW-1...)
Make/Edit your existing rule: ANY yoursmtpserver YOUR_SMTP_RESOURCE
ACCEPT
This is how it is basically done...may want to adjust depending on your
rulebase, mailing systems, etc.....
With FW-1 v4.1 Service Pack 3 the SMTP Security Server can filter based on
filenames now...without a 3rd party tie in (although you probably can
anyways with a 3rd party OPSEC Anti-Virus product...)
Amin Tora
ePlus Technology
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-----Original Message-----
From: Muhammed Riyas Kunhi [mailto:[email protected]]
Sent: Tuesday, December 26, 2000 12:37 AM
To: '[email protected]'
Subject: [FW1] SMTP RELAYING
Dear Friends,
I am using checkpoint firewall1 ver 4.0 with windows Nt Service pack 4.0.
And My mail server (Exchangeserver5.5 with srv4 and win NT4 with Srv6a) is
configured going through firewall and I am using antivirus server as well.
>From my exchange server I blocked the smtp relaying by using routing
restriction for only authenticated user and it is working fine for internal
network. But if any body try to use our mail server for relaying their mail
from outside firewall, then firewall is just allowing to come inside to the
exchange and exchange is making a non delivery for this mail. Is there any
way to block the SMTP relying from firewall itself.
Any help will be appreciated.
Thanks
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