Modem & router connections fails

Saxophone00

Commendable
Jul 18, 2016
2
0
1,510
Internet connection via modem and Ethernet cable works fine. Adding router in the middle (modem-Ethernet-router-Ethernet-computer) provides no internet. The two can talk - the computer sees the Internet but cannot connect, the connection light on the modem turns on but is red, and the Internet light on the router turns on. Where is the problem, and how can I fix it?