Set up a fixed IP address (in TCP/IP properties)

I have my computers networked together at home & have opened some ports & configured the hardware firewall to allow access for certain programs.

I set this up in the router options by opening ports & then in the Firewall Rules section allow these by typing in the different computer's IP addresses (e.g. 192.168.0.3)

On the desktop PC & the laptop both of their network connections 'Obtain an IP Address Automatically'
(Right click on the connection>Properties>Intenet Protocol (TCP/IP)>Properties). So I check the computer's IP address by typing 'ipconfig' at the Command Prompt.

But the trouble is that when I reboot the computers they 'obtain' a new IP address. So the firewall rules I created for each PC in the router settings are often messed up & I'll have to type in the new IP addresses in the router's firewall rules section.

So I assigned an IP address for the desktop PC as 192.168.0.3 (with a subnet mask of: 255.255.255.0) so that it wouldn't keep changing.
The networking part works fine & I can access the other computers & swap files between them all. But I can't access the internet (or at least the programs can't).

Here's what setup I have:

Netgear DG834G
Desktop PC (cable)
Mac (cable)
Laptop (wireless)

They are all networked togther & all access the internet through one of those all in one modem/router/swith/access point thingys

Is it possible for me to setup IP addresses for the PC & laptop so that the networking works fine & I can access the interent?

Compatible Support Forums: Set up a fixed IP address (in TCP/IP properties)