Connecting laptop through desktops 3G modem

[Pondboy]

I have been trying to get my laptop to "see" my desktops 3G modem. It has "seen" it in the past, but due to reloading XP, I have lost the right (DNS, MAC or something) settings.

My wireless router uses the address 192.168.2.25

My desktop is set to

192.168.2.10 - IP address
255.255.255.0 - Subnet Mask
192.168.2.1 - default gateway

192.168.2.1 - DNS server addresses

My laptop is

192.168.2.20 - IP address
255.255.255.0 - Subnet Mask
192.168.2.1 - default gateway

192.168.2.1 - DNS server addresses

They are all using the same SSID

My 3G modem is given a variable IP address by vodafone each time I create the connection. It is set to Share its connection.

I can see the 2 computers in my network places.
When the connection used to work I could see the "shared" 3G modem in my laptops network places

I don't know why I have to have the values 192.168.2.1 as my default gateway, but the computers don't appear on the network unless I have something in there.

Switching off firewalls does not help (I have them set both to permit the range 192.168.2.1-192.168.2.255)

What is causing the problem?

DNS?? MAC?? Random act of Mr Gates??

Grrr PB

 

[Pondboy]

After two days of continuous searching I found the answer to my problem.

Set the laptop TCPIP settings to:

static IP address 192.168.0.3
subnet mask 255.255.255.0
default gateway 192.168.0.2 ( My desktop which has the 3G modem)

Preferred DNS server 208.67.222.222
Alternate DNS server 208.67.220.220

These DNS addresses are provided by http://www.opendns.com/ who provide the DNS lookup service and have handy instructions on their website.

I even got the PS3 working on the internet using these addresses.

PB