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How do we access mails from outlook through squid proxy server.

Posted on 2004-08-27
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Last Modified: 2010-08-05
Hi Experts

We have  squid proxy server (squid-2.5.STABLE1-7.1.91mdk). Our mail server is running remotely & maintened by ISP. We are used pop3 & smtp adresses to access mails. But  we are not able to access (send/recieve) mails from microsoft outlook express through squid proxy server. But IE is working fine, with squid. If you have any answer regarding this please help me out.

Thanking you,


Ramanagouda



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Question by:ramanagouda
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by:grblades
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Hi ramanagouda,
Squid is only a proxy for web and ftp. When you use IE you are using Squid as a proxy server to the webmail interface.
When you use Outlook you are connecting directly so you cannot use Squid. You will need to permit outgoing smtp and pop3 to the mail server in your firewall configuration.
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by:ramanagouda
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Hello grblades

I know squid is web & ftp proxy. But i wanted know how to permit outgoing smtp & pop3 in firewall & Microsoft outlook configuration also.
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by:grblades
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What firewall are you using?
Is it just simple iptables or is the firewall a different machine?
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by:ramanagouda
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We are using just simple iptables
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by:grblades
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Can you post your current iptables configuration. On RedHat this is a text file located at /etc/sysconfig/iptables.
I'll then tell you what to change.
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by:ramanagouda
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Our iptables configuration as follows

# Generated by iptables-save v1.2.7a on Tue May 18 17:53:00 2004
*nat
:PREROUTING ACCEPT [1:78]
:POSTROUTING ACCEPT [2:985]
:OUTPUT ACCEPT [2:985]
COMMIT
# Completed on Tue May 18 17:53:00 2004
# Generated by iptables-save v1.2.7a on Tue May 18 17:53:00 2004
*mangle
:PREROUTING ACCEPT [54:5044]
:INPUT ACCEPT [54:5044]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [53:4966]
:POSTROUTING ACCEPT [53:4966]
COMMIT
# Completed on Tue May 18 17:53:00 2004
# Generated by iptables-save v1.2.7a on Tue May 18 17:53:00 2004
*filter
:FORWARD ACCEPT [0:0]
:INPUT ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
COMMIT
# Completed on Tue May 18 17:53:00 2004se
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grblades earned 125 total points
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It looks like your firewall settings are empty. I guess you have routing turned off and this is why access through Squid is the only access you have.

You will need to do the following :-
1) Enable routing
2) Configure the firewall to perform NAT (Network Address Translation)
3) Configure the firewall to only permit outbound POP3 and SMTP connections.

I suggest you post a pointer question in the Linux area to ask someone there to help you out with this.
I have done it a couple of times myself but I don't have access to a machine configured this way in order to give you a quick guide.
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