Detect an IP address of a Wireless Access Point device

I have a Wireless Access Point device, which I am planning to put into BeagleBoard-xM, in order to achieve wireless communication (LAN). However, I can't find it's IP address. I mean, I have to know it's IP address in order to connect with BeagleBoard-xM via a terminal emulator.

For the moment, I have this device connected via Ethernet on my router. My router's setting page shows I have this device connected, but no further information. Is there any way to find the IP address of the Wireless Access Point?

I hope of being understood. Any help would be really appreciated.

dempap

Posted 2013-10-25T15:26:01.760

Reputation: 359

A WiFi client connects to a SSID. When the connection was successful, the client gets an IP-address and knows the access point's IP-address. – ott-- – 2015-02-20T20:32:30.580

1If its connected and assigned an IP by the router, it should show the IP in the DHCP table of the router. – Austin T French – 2013-10-25T15:27:32.410

My mistake. Router's setting page shows no device connected, but status of the Ethernet port is up. DHCP server is enabled. What do I miss? – dempap – 2013-10-25T15:45:28.837

The status of the port being up just means that there is a link. Not that there is any data being exchanged or any IP has been assigned or even requested. So the device might not even have an IP yet. – Hennes – 2013-10-25T16:08:43.447

Answers

An access point will probably use one of the following IPs, though it doesn't have to:

192.168.0.1
192.168.1.1
192.168.1.254

From Linux, you should be able to do:

sudo ifconfig eth0 up 192.168.0.23
sudo ping 192.168.0.1

replace the 192.168.0 in the ifconfig line with the first three digits of the other IPs, and if you get a response, that's your number. The 23 is just a random number between 2 and 240; avoid numbers used on other computers!

As a last resort, use nmap to do a host scan:

sudo nmap 192.168.0.*
sudo nmap 192.168.1.*

Once identified, the following:

sudo route add default gw 192.168.0.1

will enable access to the world through the gateway, should you want. Finally, to get a nameserver (so you can ping "google.com", say) find out the address of your ISP's nameserver and do:

sudo echo "nameserver $ISP_DNS" >/etc/resolv.conf

The above should be replicable with DHCP but only if the DHCP server on the access pont is running and configured properly!

rivimey

Posted 2013-10-25T15:26:01.760

Reputation: 149

Accesspoint is not always the same as default gateway or DHCP server, so these may not work – ReZa – 2017-12-23T20:31:34.417

Type: arp -a (look for the MAC address of your access point, and note its IP address)

ram

Posted 2013-10-25T15:26:01.760

Reputation: 1