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Re: UPDATE: [wcolburn@nmt.edu: SMTP relay through checkpoint

daemon@ATHENA.MIT.EDU (Tommaso Di Donato)
Sat Feb 23 07:08:39 2002

Message-Id: <5.1.0.14.0.20020222172736.0259f818@popmail.sicurweb.com>
Date: Fri, 22 Feb 2002 17:27:44 +0100
To: bugtraq@securityfocus.com
From: Tommaso Di Donato <t.didonato@sicurweb.it>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"; format=flowed


>The authors of Squid sorted that problem out YEARS ago. The default ACLs
>within Squid state:
>
>acl SSL_ports port 443 563
># Deny CONNECT to other than SSL ports
>http_access deny CONNECT !SSL_ports
>
>i.e. you can only use the CONNECT proxy option for ports 443 and 563.
>
>I'm amazed this isn't the default in other products...

I love Squid, and yes, default Squid configuration solves this problem...
But if you want a secure proxy, you have to change the parameter http_port 
to listen only to your internal IP address!!! Default config is:
http_port 0.0.0.0
so anyone from the internet can use your proxy (I fond a lot of server so 
configured!!!!). Change it to
http_port 192.168.1.254 #private IP

My 0.02...

Tommaso Di Donato


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