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Old 09-26-2003, 06:15 AM   #1
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Registered: Apr 2003
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linux ip forwarding

Hi penguin lovers

We have a linux ver 9.0 redhat installed with two network cards
. the ip of the card is and this machine is connected to an isdn router whose ip is
I get connected on the nodes which have a class B address to teh linux server running squid proxy. the ip of the proxy is port 3128. my problem is i cannot receive mails in outlook express on the client nodes although i can get connected to the net.
The settings i give normally in the outlook configuration connecting directly via router are

This works fine if the client is having the same class ip as the router. The moment u try and download mail via squid it does not work.

Old 09-26-2003, 06:48 AM   #2
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Registered: Sep 2003
Location: .SE
Distribution: Debian
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Altough I am n00b I think that you should either:
1. Set up a firewall with ip-masquerading and ip-forwarding on you'r server where you can control allowed hosts and so on (instead of proxy)

2. Set up a filter on the server from where you can get you'r mail e.g spambayes (of course this only works if you can get mail from within the server)

3. Weird squid-proxy-configuration!?

Dunno if this is the answers but at least I tryed :-)
I hope you solve it, cheers!
Old 09-26-2003, 08:27 AM   #3
Registered: Mar 2002
Location: Edinburgh, Scotland
Distribution: Suse 7.2, Gentoo 1.4, Solaris 9
Posts: 661

Rep: Reputation: 30
Squid is an HTTP proxy only. You will want to use firewalling on the squid box, specifically ip-masquerading, to get you mail clients to the outside world.


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