Here is my situation:

- The Wifi network I try to access is using WPA-PSK and I've already found out that key.
- However, the router's DHCP is disabled, and I do not know its IP Range, as well as its subnet mask and default gateway.

Therefore, I cannot connect to that Wireless network.

Is there any way/tools to detect the IP Range of the network from the outside ?! My friend told me that I can use some tool like Wireshark to sniff packet and find out that IP range, but how can I sniff when I cannot connect to it ?!

Is there any tool in Backtrack that can help me to do it ?! If yes, please guide me a little bit on how to use it since I'm not an expert in using Linux.

Thanks all of you a lot