[Sheflug] Transparent proxy - firewall setup

[Rob Keeling <rob [at] xxxxxxxxxxxxxxxxxxxxxxxxx>]

I need to configure a firewall machine to link some laptops to a 
network, I am not allowed to alter any settings on the laptops, but will 
need to

divert all outgoing port 25 connections to our mail server.
transparently proxy http & https trafic to be routed through an external 
proxy server. (this is the only way past a external firewall.)

Can anyone suggest a good starting point preferably using suse 9.1?

Can I acheve redirection of the https traffic?

port 25 should just be a iprule command but the proxying is stumping me 
at the moment.

Any suggestions?

Rob Keeling
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