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Security Blog

General articles on IT security

Firewall Testing (Hardening)

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Here are some tools and techniques to test if your firewall is up to scratch:

1. www.pcflank.com
Contains various test for the firewall including: port scanners, stealth testing, leak test and others.
For leak test, download PCFlankLeaktest.exe. This test tries to send some information out of your PC to the PCFlank site. The results are shown in http://www.pcflank.com/pcflankleaktest_results.htm

. According to PCFlank, only Outpost Firewall Pro and Tiny Personal Firewall pass the leaktest. At PCKingsford, we have tried the FREE Comodo Firewall Pro (CFP) and this works. If it fails, you just need to be sure that you have not tell CFP to ALLOW it. To check whether an application is allowed in CFP, open up the CFP, go to the Defense+ on top, then go to the Advanced tab on the left menu, then click Computer Security Policy. Look for the application name and edit the rules for it.

2. ShieldsUp at http://www.grc.com/faq-shieldsup.htm
Click on Services tab on the website, then select ShieldsUp. Follow the instruction to test your firewall via this website. The tests include:

  • File Sharing
  • Common Ports
  • All Service Ports
  • Messenger Spam
  • Browser Helpers

3. Leaktest 1.2 at http://www.grc.com/lt/leaktest.htm This is one of the original firewall leaktest program that started it all.

4. Firewall Leak Tester
This is a one-stop shop for leak tester programs you can use to test your software. It has over 26 leak testers. The website published results comparing various firewalls but note that the comparison was done in 2006 so that may have been outdated. You can always download the leak testers and test individually.

(this article can also be seen at: www.xtechnotes.blogspot.com )

Last Updated on Sunday, 13 July 2008 17:16

Antivirus - Online Scan

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As with Firewalls, there should be at most, one Antivirus program running on your PC. More than that will cause uncertain behaviour. But how do we know that our antivirus is a good one. Or if we scan a file and it passed our antivirus scan, are we sure it is OK? One solution is to scan the file or files using online scanners available from the web. Here are a few of them:


Even easier is to upload one file and have it scanned by multiple antivirus software. This can be done at: www.virustotal.com

Alternatively, one can use a sandbox to test our suspicious applications first. Some of the sandbox are:
Norman Sandbox - www.norman.com/microsites/nsic

(this article can also be seen at: www.xtechnotes.blogspot.com )


Last Updated on Sunday, 13 July 2008 17:16

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