There are many reasons you might want to access your Xfinity router login. For instance, you may want to change your wireless password or set up port forwarding for a project you are working on.
In any case, you’ll need the Comcast Xfinity router IP address listed below to log into your router. If you have a have modem router combo, this is also known as your modem login.
How to find Xfinity router login and change wifi password
1.Make sure you are connected to your network
This can be a wired or wifi connection.
2.Open a browser and go to 10.0.0.1
This is the router’s gateway and it will automatically bring up a log in screen.
3.Enter username and password
Now you’re logged in.
4.Change your password
You can change your password by click “Change Password” at the top right of the admin panel.
Source : How to change wifi password