Javascript port scanner

I was pretty bored yesterday and I found my work a bit too easy so I thought I'd have a go at something different.

I decided to create a javascript port scanner, the scanner only works on Firefox at the moment (I may change it to work in other browsers) and has three options, option one scans for a local FTP server, option two scans for a local web server and the third option does a NAT router scan and guesses which type of router you have.

It assumes that you haven't changed the default configurations and supports a few models of routers. Check it out below:-

Update...

I've added a bunch of default gateway addresses to my scanner and it should now display the host as well on the NAT router scan. The script has been updated to allow router submissions and I have removed the localhost web server scanner and localhost ftp server scanner because I found them less interesting than the NAT scanner.

Technical details

The scanner object takes a list of router objects from the arguments of the function and then performs a scan of each of the routers. It creates a iframe to do this, using the onload handler to check if it was successful.

Javascript NAT router scan demo