1. Using a default password
Everybody has probably heard the advice to always have a unique password and to change it regularly. This is smart but for network appliances it is kind of unrealistic. Typically a network appliance is used by a lot of people and so the constant changing of a password can cause more problems than it would prevent.
The problem remains, however, that default passwords are very risky because they are more easily compromised by hackers. This is even truer for network access points, firewall appliances, and intrusion-detection appliances.
2. Using a weak password
A strong password can be an even better defense than a unique password or frequently changed password. Never include any part of your name or user name. Do use the name of your city’s sports team or High School mascot.