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Old 10-17-2004, 12:58 PM   #1
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Registered: Oct 2004
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Intercept outgoing traffic through a firewall????

I am relatively new to linux. I am looking for a software firewall which will prompt me for outgoing internet connections, similar to what zone alarm does for windows. I am running mandrake linux 10.0 official edition. I am concerned about somebody breaking in to my pc and using a reverse http ,or other protocol, tunnel to send information back on to the internet. I just want to be prompted for a 'yes/no' kind of answer when a peice of software (browser included) is trying to access the internet. I already have a Linksys router/firewall and NAT setup on my network facing the internet. I also have a firewall on my linux box which just allows incoming ssh traffic by using port forwarding on the router.

Old 10-17-2004, 01:10 PM   #2
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Registered: Apr 2003
Location: nottingham england
Distribution: Gentoo
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Given Linux's Roots as a server, Linux tends to like to make decisions by itself... the whole network security is geared towards making desisions itself based on config files.. there isnt much need for haulting the system to wait for user input.

you could look into iptables frontends like "firestarter". they will indicate what's happening, but i dont think any will actually stop allowed traffic to wait for a human to okay it.

if you are paranoid about security, look into programs like tripwire or snort.
tripwire will let you know whenever an important file is modified, which should detect intruders.

and snort will watch network traffic, and report (or block) any unisual traffic.. like hack attmepts / exploits / unwanted proxies.


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