Now that you've got the default login credentials, it's time to embark on the thrilling adventure of logging in to your router. Open a web browser (any one will do, but let's be real, Google Chrome is the best) and type in the router's IP address, which is usually 10.1.10.1 for Comcast Business Class Routers. Don't worry if you mess up; it's not like you'll accidentally launch a space shuttle or anything (although, that would be kinda cool).
As you log in, you'll be asked to change the default password (finally, a chance to use that super-secure password you've been saving for a special occasion!). Make sure to choose a strong password, something that's a mix of uppercase, lowercase, numbers, and special characters - you know, like Giraffe#LemonTree88!. Don't worry if you forget it; you can always reset it (but let's not go down that path, okay?).