[PtolemyIV]

I've just joined virgin and am trying to hook up my wrt54gs to the cable modem to relay internet access wirelessly around my flat.

i want to use the wrt54gs as the dhcp server for my local lan (192.168.1.x)

however i am finding that: (all being tested using wired ethernet to router)

a) if i connect pc to router with no modem connected then router assigns appropriate ip in range (e.g. 192.168.1.100). however, if i then connect the cable modem to the router i am unable to browse internet.

b) if i have modem connected to router and then connect pc to router then i get assigned a global ip address (e.g. 92.234.x.x) presumably by the cable modem. i can access internet but only one device connected to the router can access internet at once (only one valid ip gets assigned and no more devices are able to join network) - also can obviously not have my internal lan for connecting various devices together.

I have tried following the approach of:
1. turning off cable modem, router, and pc for 2+ mins
2. turning on cable modem and waiting 2 mins
3. connecting router to cable modem and turning on and waiting 2 mins
4. connecting pc to router and turning on pc

PC still gets assigned a global ip address!

It seems to me that i want to turn off the dhcp server in the cable modem but accessing the router page (192.168.100.0) yields no options to do this (status pages only)

Any suggestions on how I get my desired setup working?

Thanks for your help!