At 01:49 PM 19/01/2001 +0200, you wrote:
>Hi All
>
>What are the best options for filtering incoming Packets on the SMTP port
>with IPCHAINS (I know they are limited) , but still allowing the service to
>receive mail. Postfix is my MTA.

IPCHAINS is NOT an application level firewall, and as such does not understand
the SMTP protocol. You either allow port 25 or you don't, you can
enable/disable
certain commands like Gauntlet Firewall can for instance.
I was talking to Rusty (the Ipchains/netfilter programer) about this
yesterday, and
he is thinking of writing for application level stuff for netfilter, but it
has not been done
yet...

Hope that Helps

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