Check your ip settings in network connections
they shoud be (of course if your router have default ip)
ip adress 192.168.1.2
subnet mask 255.255.255.0
default gateway 192.168.1.1 (ip of your router)
preffered dns 192.168.1.1
with that settings you shoud be able to connect to your router
and my last advice is try reading qiuck start guide