Firewall Help!

jorasmi · 02-07-2005, 03:48 AM

I have a Squid running as my firewall. The purpose why we setup a firewall is to prevent our employees inside our network from sending information to other network. As of the moment, they can only go to our website. My problems are:

1. How do I let them browse other site without letting them send files?
2. How do we allow them to use email and prevent them from attaching files?

Sorry if i post it in this in this forum. This is the se
Thanks!

skunkburner · 02-07-2005, 04:20 AM

You do know that Squid is a proxy server and NOT a firewall don't you?

As far I am aware Squid cannot filter attachments from emails etc.

What you want is a packet shaper / email filter.

Note
You can grant/deny access for the any mention of zip in the URL using the 'URL Regexp' option, but this is a blanket ban and will stop anything with the a zi & p in the URL.

jorasmi · 02-07-2005, 08:45 PM

Ups! From the begining i thought this is a proxy and firewall. So is there any software preferably open source that you suggest i use as a firewall for our company?

skunkburner · 02-08-2005, 02:45 AM

If you want to set up a quickfirewall on a Linux box use 'iptables' its a command line based firewall that seems to be included on all linux ditros. Couple that with Webmin (a remote admin tool) to get a gui. (http://www.webmin.com)

jorasmi · 02-08-2005, 03:02 AM

it says here that proxy server is a type of firewall. please check http://www.tldp.org/HOWTO/Firewall-HOWTO-2.html#ss2.2

i'm having a hard time looking for program, firewall, proxy whatever that can prevent email attachments. we have a pop3 account and also users can just go to internet sites and do the mail there. please help

skunkburner · 02-08-2005, 04:09 AM

I am not aware of any 1 product that can do all that.

A quick google gets the following link - Thats an email filter.

http://www.icewalkers.com/Linux/Soft...alterMIME.html