Tranparenet Proxy

We have alltogether 50 pc which are connected through internet via squid proxy server, but we are unable to get messages from outlook express. Any one explain the solution for this.
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ranadastidarAsked:
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grbladesCommented:
Hi ranadastidar,
Squid is only a proxy for web and ftp. It can't be used to proxy email connections.
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mehul_gajjarCommented:
Dear..

please check which you r using for mail service  sendmail OR postfix Or Others.?

this is not problem reguarding traparant proxy.
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rindiCommented:
Check the config of your 50 pcs. If they are running XP and SP2, turn off the new, integrated firewall.
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ranadastidarAuthor Commented:
Actually I am interested to download pop3 emails from outside server, when I directly connected to the net then there is no problem with outlook express, but when I am using squid proxy outlook express won't working.
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grbladesCommented:
In that case it has nothing to do with Squid since Squid does not proxy email connections. It is the firewall that is being used which is oviously blocking emails.
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ranadastidarAuthor Commented:
No there is no firwall at present in my system.
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grbladesCommented:
So how are you sharing the Internet between the 50 pc's?
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ranadastidarAuthor Commented:
through squid proxy.
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rindiCommented:
Still have a look at those 50 Windows XP PCs. Since Servicepack 2 Microsoft has added a Software firewall which is automatically turned on after the update. They do that without asking so after the update most people in an internal lan have some sort of issues with networking. You just need to disable the firewall on those PCs to get them to pick up their email again. You can find the firewall inside the control Panel.
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grbladesCommented:
So you have one PC connected to the Internet and then the other PC's all connected to it over the network?
If you have not configured the firewall on this machine to share the connection you will only have web and ftp access through the proxy server and nothing else.

What version of Linux are you running?
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ranadastidarAuthor Commented:
redhat 9.0
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grbladesCommented:
So you have one PC connected to the Internet and then the other PC's all connected to it over the network?
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derekrvCommented:
As previously posted, Squid doesn't do anything with e-mail traffic.

From what you've said, I get the impression that:
- your RH 9 box has a connection to the Internet and your internal LAN
- the Outlook clients on the internal LAN need to connect to a mail server somewhere on the Internet

As previously mentioned, there's a difference between "connect to the Internet" and "use a browser to access Internet websites and ftp servers".   The latter can be done with a proxy server;  the first needs at the very least a router (if you have your own class C, and no firewalling), or a firewall, probably one doing NAT.

The firewall is either in the Linux box, or it's in something downstream of the firewall - perhaps provided by your ISP?

What's the output from the following two commands on your Linux box ?  (running as root)

netstat -rn
ifconfig
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