Comments on: Javascript port scanner

By: router ip

router ip — Tue, 15 Feb 2011 00:54:15 +0000

Really good article, but this won’t appear to work together with my router ip, any hints?

By: Gareth Heyes

Gareth Heyes — Thu, 18 Dec 2008 15:02:12 +0000

@kingthorin

That’s cool! I didn’t think it could work on FF3. Nice one.

By: kingthorin

kingthorin — Thu, 18 Dec 2008 14:57:40 +0000

Oh and yes I agree with post #5, if you can get their address you’d have to make assumptions about where the router is (or try all … but that might be CPU/time intense for 255 addresses).

By: kingthorin

kingthorin — Thu, 18 Dec 2008 14:48:33 +0000

Not sure if you’re really interested in putting anymore work into this but…

Check this out:
http://browserspy.dk/ip.php

It grabs not only my external IP but also my local DHCP’d internal IP. (Firefox 3.0.4)

By: Gareth Heyes

Gareth Heyes — Fri, 12 Dec 2008 09:38:26 +0000

There’s no direct way but it would be possible to guess a few addresses like *.1 or *.254 because most routers are either at the start or end of the address range. Many people don’t change the defaults especially when at home so it’s a lot more likely with home based routers.

Another possibility is finding the router without the IP address. Many routers have a default dns name which can be used without knowing the IP.

By: kingthorin

kingthorin — Thu, 11 Dec 2008 19:10:13 +0000

There must be a way via JavaScript to get the local IP of the host system that IE (or FF) is running on so would it be possible to check the images etc guessing based within the range of the assigned IP?

i.e.: I’ve changed my DHCP range on my linksys to be 192.168.3.0/24. Using JS it should be possible for the browser to ‘tell’ the JS LanScanner that I’m 192.168.3.5 and then check 192.168.3.1 (or whatever assumption you want to make …. or check the whole /25) for the image to fingerprint the router.

By: Gareth Heyes

Gareth Heyes — Sat, 27 Sep 2008 18:35:34 +0000

Some have been included but obviously there would be too many to include them all. I found a list of routers with default IP addresses and added those. If you know of a list of default addresses let me know and I’ll add them.

By: Anonymous User!

Anonymous User! — Sat, 27 Sep 2008 14:12:02 +0000

It tries to connect to 192.168.x.x
What about the 10.0.x.x etc suffixes?

By: Gareth Heyes

Gareth Heyes — Thu, 26 Jul 2007 09:55:36 +0000

To help me improve the tool, please leave a comment if the scanner failed to find any servers. Ideally leave the name of the router and it’s default IP address. e.g. Netgear 192.168.0.1

Also if anyone could leave the address to a default graphic on their router with the brand and model I could also add fingerprinting information to the tool.

If you would rather send it privately, please send to gareth at businessinfo co uk, with the subject “Router info”.