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This "router" is not a typical situation. I'm using my phone as a hotspot and can only configure a select number of DHCP options.

  • I can manage the limit on how many devices/clients can use my phone as a hotspot. I have to select from a radio-button list with the options: 2,3,4,5, or 8

  • I can specify the DHCP starting IP address. In this case, it begins at 192.168.6.106

When I'm connected via WIFI to my phone, an ipconfig /all command shows me that the default gateway is 192.168.6.1 and my IPv4 address is 192.168.1.148. I have the luxury of connecting another device to the phone and that device was assigned 192.168.1.121.

I've tried connecting to 192.168.6.1, hoping for some sort of router setup page that I'm used to seeing, but there is no such thing or maybe it's just a matter of incompatable operating systems.

In summary, the "router" (phone) has an IP address of 192.168.6.1 and a DHCP server that begins at 192.168.6.106 and allows up to 8 connections. Normally, I would assume a range of 192.168.6.106 - 192.168.6.113, but connected clients are showing otherwise.

How can I figure out which IP addresses are set aside by DHCP for clients?

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You could perform a DHCP exhaustion attack to see what range of addresses / how many it will give. A quick search shows that Backtrack linux and Metasploit support these. –  Bryan Jul 1 '13 at 14:02
    
Thanks - I should've known that a program like this existed. Can you post your suggestion as an answer and provide links to this software? If you don't want to go through all the trouble of finding direct links to software that performs this task, please just explain what to look for to find sofware like this. Thanks again. –  user234831 Jul 1 '13 at 14:15
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@Bryan told you what, here's how: Example attack: http://www.digininja.org/metasploit/dns_dhcp.php

You can get Kali Linux (new BackTrack) with metasploit there: http://www.kali.org/downloads/

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