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Old 06-26-2000, 09:05 PM   #1
bfloeagle
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I have set up a firewall on my Linux box. What are some simple ways of testing, inside and outside my LAN, to make sure it is up and running?
 
Old 06-27-2000, 12:04 AM   #2
jeremy
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amiller,
There are a few different ways to test a firewall. I will cover a few

First download nmap and test the firewall with it (from inside and outside if possible). nmap is available from http://www.insecure.org/nmap/ and is basically a VERY advanced port scanner. There are also a few very good online scanners. Two that I can think of off the top of my head are ShieldsUP and dslreports secureme (http://www.grc.com and http://www.secure-me.net respectively).

If you would like a better overall view of the security/integrity of your network I would highly recommend you run both nessus and SAINT (http://www.nessus.org and http://www.wwdsi.com/saint) which are IMHO the two best security auditing tools around.

If you need to tweak your rules (I assume you are running ipchains) I would head over to
http://www.linux-firewall-tools.com/...all/index.html which is a great online resource. (BTW I own the book that he is plugging on that page - I definitely recommend it).

Last but certainly not least your could always give us your IP and see what kind of damage we could do
 
  


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