<div class="gmail_quote">On 19 October 2010 18:18, Hakan Koseoglu <span dir="ltr"><<a href="mailto:hakan@koseoglu.org">hakan@koseoglu.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> On 19/10/10 16:54, Cornelius Mostert wrote:<br> > The scenario is as follow:<br> > 1. You have permission to work as Admin on a Lan<br> > 2. You do NOT have any documentation from the previous Admin<br> > 3. You find a router / WiFi Router that is in use and therefore you can<br> > NOT reset it<br> > 4. This router is a "home" / consumer router like Netgear, Linksys, etc.<br> > So not an enterprise router<br> > 5. You need to brows to the routers config web page to make some changes<br> > (you assume the default admin and password for the router) BUT you do<br> > NOT know the IP address<br> > 6. You know the router is NOT a DHCP server<br> ><br> > Now the question is HOW do you find the IP address of the router ???<br> <br> If it is the router providing the access outside, netstat -nr will show<br> you the route, hence the IP address of the router.<br> If you know which servers/clients are using it as a gateway, run those<br> commands from there.<br> <br> But what then, what will knowing the IP address provide to you, I'm not<br> sure.<br> <br> If the previous admin has walked away with all of the information, I'd<br> treat that router as compromised and take it off the net ASAP and<br> replace it with a known configuration - damn the users, just let them<br> know about the outage.<br> <br> Nmap will attempt to show you any IP addresses on the network with a<br> reasonable distinction of if the device is Netgear, Cisco etc.<br> <font color="#888888"><br> --<br> <a href="mailto:ubuntu-uk@lists.ubuntu.com">ubuntu-uk@lists.ubuntu.com</a><br> <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-uk" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-uk</a><br> <a href="https://wiki.ubuntu.com/UKTeam/" target="_blank">https://wiki.ubuntu.com/UKTeam/</a><br> </font></blockquote></div><br><div>+1 for netstat -nr. Also look for a factory reset button on the router, but make sure you know the settings first!</div><div><br></div><div>Steve</div><div><br></div>