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Topic # 225594 25-Nov-2017 12:54
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I set up a friend with a wireless AP, an old Linksys. I set it up so it gets IPs from the main router using DNS passthrough and pretty much just acts as a WAP.

 

I need to change the channel on it, but I can't work out its IP address. "ipconfig" on both a desktop using ethernet and a laptop using the Linksys tells me the gateway is 192.168.0.1. Traceroute I just see 192.168.0.1 then to the internet.

 

How do I find the IP of the Linksys router?





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  Reply # 1907633 25-Nov-2017 13:11
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If you are confident the management interface is going to be in the same subnet as the clients then you could use nmap or similar to locate it. If you think it might be in a different range then just take the hit and factory reset it.

 

 








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  Reply # 1907669 25-Nov-2017 13:47
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Fing on a mobile connected to the same network.

 
 
 
 




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  Reply # 1907671 25-Nov-2017 13:55
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Tried ipconfig from laptop.

How do you use nmap? Built into Windows or download?

Can it search any IP range, like 192.168.0.0/16 ?




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  Reply # 1907679 25-Nov-2017 14:12
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Is it grabbing it's own address from the main router? If so, check the DHCP reservations on that.


epr

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  Reply # 1907683 25-Nov-2017 14:41
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On a machine on the same network angry ip scanner.



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  Reply # 1907692 25-Nov-2017 15:27
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Good tips, thanks, will try those later or tomorrow.




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  Reply # 1907693 25-Nov-2017 15:27
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Good tips, thanks, will try those later or tomorrow.




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  Reply # 1908824 28-Nov-2017 10:00
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If you know it's mac address, always worth checking ARP tables too.





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  Reply # 1908833 28-Nov-2017 10:17
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Hehe, I've had that issue before also.

 

 

 

When you do find it and login to the AP, set the address outside of the DHCP range of the main router and write it on a sticker on the AP somewhere.


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  Reply # 1908847 28-Nov-2017 10:41
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Plug in to it directly and run wireshark. Look at the ARP packets.




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  Reply # 1908899 28-Nov-2017 11:01
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Once my friend gets back to me I'll try the angry IP scanner first. I could go over but will avoid that if possible. Wireshark is a PITA if you don't use it regularly, but it's a fallback. I'd probably reset to factory defaults before I did that though.





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  Reply # 1908902 28-Nov-2017 11:03
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timmmay:

 

Once my friend gets back to me I'll try the angry IP scanner first. I could go over but will avoid that if possible. Wireshark is a PITA if you don't use it regularly, but it's a fallback. I'd probably reset to factory defaults before I did that though.

 

 

Start Wireshark on your LAN interface, filter is just "arp", and then plug in to the AP and watch the offers... less than 2 minutes.


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  Reply # 1911838 1-Dec-2017 21:27
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https://www.fing.io/


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  Reply # 1911871 2-Dec-2017 07:20
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For devices on the same subnet http://www.nirsoft.net/utils/wireless_network_watcher.html is pretty quick.

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