For those of you who would like to protect your router(s) here is a simple method.
Open a new blank tab in your browser. In the address bar type in 192.168.1.1 and press Enter. On typical systems you will be presented with a login window. If it has not been changed the username will be admin, and so will the password; fill them in then hit OK/Enter.
You are now in your router configuration pages. The first pages are a synopsis of your router's performance and settings and are information only. To change things you will need to go to the Advanced tab. The new pages are where you can change things and they are open to you, or anybody else, because of the username/password pair of admin/admin you used in the login screen.
To make things so that strangers cannot access your router you need to go to Maintenance and change the Username and Password pair to something of your choice. Note: on some systems the username cannot be changed. Your password should be at least 8 characters long and a mix of upper/lower case letters and numbers, for example: H0td0gandch1ps (Hotdog and chips without the spaces) - write yours down somewhere - do it NOW. When you have changed the password you will need to Add/apply or OK it and reboot the router. When the router has rebooted you should logout and close the browser tab.
Shut down and restart your browser and open a blank tab. In the address bar type in 192.168.1.1 and press Enter. this time the login page will require the new username and password pair. If the browser asks to save the details tell it No. Done!
How did I know your router address was 192.168.1.1 and your login details were 'admin' 'admin'? I'd have to kill you if I told you.