Most routers have a default password.
At your own risk you may use the cold reset: unplug the router and make it lose all stored information.
A cold reset is NOT done by pushing a reset button
, it is done by unplugging.
Take off the electricity for a while. For a while is necessary to unload the capacitors (
http://en.wikipedia.org/wiki/Capacitor) that keep the voltage up for a while thus keeping the data. Normally that saves you from losing data if there is a short break of power.
The memory is really reset when the voltage = 0 zero.
Mind you ! You lose all data on your router!
So you better make a backup or put down in writing how you organised it.
Making backups and notes is always a good thing. Saved me many times.
After unplugging for a while most equipment falls back to the (factory) default mode.
You may be lucky when you connect it to power again (after a while) your firewall just is off, since that is the default situation.
Default may mean: no password at all, most likely it is something silly like admin or 0000 .
If not, your default password is mentioned in the documentation of your router.
If you lost your documentation you can probably find the default password at the site of the company that made your router.
You better lookup your default password first before you start unplugging !
In the end do not forget to install/organise your router again !
Hope it helps some of you
Greetings
Viator