[olug] iptables question

[Noel Leistad]

offering up for anyone to take a shot....disclaimer -- I'm not very good 
w/ iptables

Subscribe to mailfiltering service that filters all smtp incoming traffic.

Spammers obviously ignore DNS MX records and try to directly connect.

Configured iptables to accept from "my_networks" which includes the 
sending address range for mailfiltering service.

Good news ... process load on mailserver dropped from 500-600 processes 
to under 150.

Bad news ... all smtp-auth requests blocked as "out of network".

Anyone know how to create a iptables chain that recognizes smtp-auth 
that would allow auth attempt w/ jump to ACCEPT if validated before my 
DROP statement.....

Thanks for the feedback.

Referrals to Solution Providers NOT rejected....mine didn't offer any 
experience on precisely what I was looking for...

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#  Noel Leistad                                       #
#  noel at metc.net                                      #
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