It depends on your router model. For more details on configuring your particular router please refer to this router configuration site.
That’s a great tool and great site..
And here’s a step-by-step comprehensive router setup & configuration guide.
As said, always glad to help, Cyke, but please always provide more core basic information — things like model numbers, type of network, O/S, etc. are ALWAYS a sure way to get better info. Like the old saying goes, “help us, help you…”
Cheers/ Good Luck,
Austin, TX USA