I need to change my IP address in Windows Vista. How do I do this?
Changing an IP (v4) Address in Windows Vista
In step 7, I entered details that are relevant to me. The default gateway is set on your modem / router. This bit is crucial. The IP address I entered was within the range allowed on my modem and the subnet mask fills itself in depending on how you typed your IP.
And if you prefer the command-line way of doing it:
Obviously the name has to be right, so list the available connections and their names to figure out which one to set:
Gateway can be left out if it doesn't need changing. To set the DNS servers to something else as well:
For completeness, to reset the connection to DHCP (automatically assign IP address and DNS servers):