Thanks Aliali, I won't pretend I understand most of what you've said -_-
I bought the Linksys E4200 as a replacement for my WRT54G so I wouldn't have to deal with this crap, but we had a power outage and the router has reset the IPs again, so my "dhcp reservation section" is not correct.
I'm just going to have to learn all this subnet IPV4 b.s.
The reset ips thing is probably because you did not go through the full apply > save config to flash and reboot sequence. You would need to read the WRTs manual to check the exact procedure.
Ok after a quick look at the Linksys manual it looks like IP reservation is easy as it provides with a "select client" option for any computers currently hooked to the router.
Log in to the router at 192.168.1.1
2. Click the Setup tab, then click the Basic Setup page
3. Click DHCP Reservation (in the middle of the screen)
4. Click Select next to the client you want to create a DHCP reservation for
5. Click Add Clients The client you selected is added to the Clients Already
You can also manually enter a client name, IP address, and MAC address
of a device to create a DHCP reservation
6. Click Save Settings
Then I would look for a save and reboot button.
This caught me a few times with my Billion modem. There is an apply button which must be used on each page you make changes then you have to click on save config then apply again, then wait about 30 seconds for the success popup and then reboot.
Also looking at the Linksys manual it seems to use the DHCP range of 192.168.1.50 to 192.168.1.100 which is nice if true as it leaves 192.168.1.2 to 192.168.1.49 free for manual IP settings.
Assuming that is right then to do it at the PC end on PC1 go to network and sharing centre > change adapter settings then double click the LAN or WLAN adapter you are using and then go to properties. Double click Internet protocol 4 (TCP/IPv4).
In the new window select the "use the following IP address" radio button and for IP address type in 192.168.1.2, subnet 255.255.255.0, default gateway 192.168.1.1.
Also select the "use the following DNS server addresses" radio button and in the "Preffered DNS server" fields put in 192.168.1.1. Apply and save all settings and exit.
Do the same on any other PCs you want static IPS but change the "use the following IP address" option to 192.168.1.3, 192.168.1.4 etc etc keeping all the other settings the same.
Do the reservation thing or the PC based fixed IP thing not both
You can then set up port forwarding (if needed) using the IP addresses you specified in the adapter properties.