How Do I Find My Router's IP address

To configure firewall settings (i.e. open SIP ports UDP 5060 and UDP 10000-20000), you have to log into your router. Here are the steps on on how to log into your router:

Windows:
Start Menu -> in the search box, type "cmd" and press enter

In the command window, type: ipconfig

Look for the line "default gateway" in the output, that's your router's IP address.