Determin IP

szelpa · Post by **szelpa** » Fri Feb 17, 2006 6:47 am

Dear all!

I'm currently working on my final assay for school which deals with wireless lan configuration, security and topology.

There is a question which occured:

How can I determin the IP-adress of a connection point (AP), if it does not assign an IP to my computer via DHCP? How do I know which subnet it is working in?

Cheers, thank you for you answer,

Attila.

reader · Post by **reader** » Sun Feb 19, 2006 7:57 am

Typically, YOU assign the IP address to the Access Point. It may, or may not, also be the Gateway.

For example...a wired/wireless network

192.168.1.1 is the main gateway/router (default for Linksys and others)

It connects via a DSL/Cable Modem to the WAN (Wide Area Network~the Internet)

In addition, you have a wireless access point. You give it the address
192.168.1.2

Computers connecting to the wireless access point still use 192.168.1.1 as their gateway and can still receive DHCP assignments from that.

Good Luck with your Essay!

Post by **YeOldeStonecat** » Sun Feb 19, 2006 8:16 am

szelpa wrote:How can I determin the IP-adress of a connection point (AP), if it does not assign an IP to my computer via DHCP?

Some APs will have a software utility you can install...that'll grab it via MAC...and show you the config.

Without that...you can use utilities out there to find the IP based on the MAC....a neat one I keep on my laptop is "cc get mac" .
http://www.youngzsoft.net/cc-get-mac-address.htm

I'm assuming you can see the access point...hence read the MAC label on it.

Another option...hit the factory reset button on the unit...refer to documentation, set it up again for your network...and document it (label the unit with the IP you assigned it)

szelpa · Post by **szelpa** » Mon Feb 20, 2006 4:04 am

reader wrote:Typically, YOU assign the IP address to the Access Point. It may, or may not, also be the Gateway.

Yes typically I do. And of course I know how to set up WLAN, how to use it. The chapter I am writing on deals with security. For this puropse I was wondering if I could determin either IP or MAC of the Accesspoint without having access to the AP (neither physically nor virtually)

My trial-AP works without WEP or other authentification for test purposes, but it does NOT assign any IPs. I connected via my laptop, and now I'd like to try to determin which IP or MAC my trial-AP has. Is there another possibility than to go through every subnet and scan for adresses?

cheers, Attila.