You'll have to default the router back to outta the box settings. To do that you hold the reset button in with a ball point pen or tooth pick for 6-10 sec depending on the brand. You don't say what brand. The button is normally recessed in a hole on the back next to the power jack. You can find a list of default passwords on the internet by brand and model number. Linksys/Cisco is usually User Name <blank> and Password admin. Then once inside you'll have to reconfigure everything unless you have the config saved on a PC or Laptop.
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You'll have to default the router back to outta the box settings. To do that you hold the reset button in with a ball point pen or tooth pick for 6-10 sec depending on the brand. You don't say what brand. The button is normally recessed in a hole on the back next to the power jack.
You can find a list of default passwords on the internet by brand and model number. Linksys/Cisco is usually User Name <blank> and Password admin. Then once inside you'll have to reconfigure everything unless you have the config saved on a PC or Laptop.