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Internal network address identified during port scan

neutrino
Newbie
Posts: 7
Registered: 06-09-2007

Internal network address identified during port scan

During a security scan at http://www.securitymetrics.com/portscan.adp (after
installing broadband & router) it managed to identify both my external
facing IP address and internal address. Unfortunately, it gives no
information on how this can be remedied (I presume that internal addresses
are meant to be hidden). I have tried the manual for the router and Google
searches but I'm having no luck finding how this is possible.

Is this information being given out by the router? Any ideas on a useful
site to help resolve this?
2 REPLIES
the_norris
Grafter
Posts: 463
Registered: 02-08-2007

Internal network address identified during port scan

Hi

Just did the same test on my setup. I have a router too.

The test showed the external and internal IP of the PC it ran the scan from.

The internal IP address is identified via the Java app that is loaded on your PC, when the page stating '"detecting proxy configuration" - or words to that effect.

Checking the Jave Console screen - the following is logged:

http://192.41.65.171/portscanlogic3.fadp?ClientIP=192.168.xx.xx

Where IP 192.168.xx.xx is my PCs IP (Internal) - the IP 192.41.65.171 belongs to that website..

I would not worry to much about the Internal IP - the open/closed port results are the important factor.

I'm not sure if you know about TCP/IP data comms and IP address. But you can't use the internal IP address on the Internet - these address are in the 'Private Address' range. IPs Starting 10..x.x.x., 172.x.x.x and 192.168.x.x.

Hope this helps

Phil
neutrino
Newbie
Posts: 7
Registered: 06-09-2007

Internal network address identified during port scan

Phil,

Thanks for the speedy reply. As you might guess I'm new to broadband and want to test out the router at a few security sites. I didn't feel at risk as I have been using a software firewall (ZoneAlarm) and I knew the router would just add to my protection. But, it's nice to understand what is happening at these security test sites and they are not always as helpful as they might be.

Thanks again

Alan