Step 1: Change the Default Password of Modem / Router
After opening modem page click on management -access control – password. Select username,confirm old password and put new desiredpassword.
Change the default password
Each router has a default username and password, and you should always change these themoment you start configuring the router. If the router's password is either unchanged common or weak, a hacker might be able to reconfigure the router and wipe out all your other security measures,making them useless. You should try to use a good mix of numbers and characters to be on thesafe side.
Tips in setting a new password
Always use combinations of letters (upper and lower case), numbers, and symbols inyour passwords.
Avoid using common words, which are known to friends and neighbors.
Change your passwords frequently.