Why wont it let me Port Forward for Minecraft Server!?

Ok so i recentley started a minecraft server. Only i can connect and i know i have to port forward. the problem is when i type my iternal ip addresss in web the username and password come up. my router say the username is admin and passsword is password. When i try to login it just refreshes and asks me again. Please any help? my iternal ip is im pretty sure 192.168.1.1 the default one.