Computer Security – Port Scanning

I’ve just been writing some code to run a TCP socket on a specific port. I was having trouble reading the response from the socket, which promted me to luckily find this damn good port scanning utility that I want to tell you about.

Its called JFirewallTest and it’s a nifty little Java program that can be run from the web page and will perform  a full port scan. All 65,536 ports are scanned very rapidly to find possible security holes in your firewall.

My sincere thanks to Michael Gardiner for developing and making this utility available free. You did a great job!

I had to download the Java runtime on all my servers and then checked them all. I’d wanted to do this for some time just to check. I new they were pretty secure and my firewall is locked down tight. Now I’m sure of this thanks to JFirewallTest.

It downloads and installs quickly and the port scan is performed in two phases and only takes a couple of minutes! Bloody marvellous! Thank you!

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