Let’s get real, it’s a school filled with wizards and controlled by wizarding adults. The Hogwarts Wifi password would be “password.” At best, it would be “hogwarts.”
But as for the individual houses…
Slytherin:
Network Name: The Dungeons
Password: 6FBb9w52 [changed monthly to protect from potential leaks]
Gryffindor:
Network Name: The Best House Ever
Password: Gryffindor1 [was “Gryffindor” for 6 years straight, but they changed it after too many unwelcome visitors]
Ravenclaw:
Network Name: Ravenclaw Tower Wifi
Password: fire [Prefects will only give the password in riddle form, it’s up to students to work out what the actual password is.The password is also changed frequently. In this case, the riddle is “Give me food, and I will live. Give me water, and I will die. What am I?”]
Hufflepuff:
Network Name: PuffPuff
Password: Pass