We have the following network setup:
- A) Modem (192.168.0.1) with DHCP disabled
- B) Windows Server 2008 R2 with dual NIC:
- B1) WAN interface (192.168.0.2)
- B2) LAN interface (192.168.1.2)
- C) Switch with multiple LAN computers (~20) connected getting IP from server's DHCP in the range 192.168.1.25-192.168.1.150
A) and B1) are directly connected, and B2) and C) are directly connected. Internet on B) works through the WAN interface, but internet on the LAN does not work. LAN connected computers cannot ping A) the modem (192.168.0.1).
The server is used as file server and functions as router, additionally it also runs WIndows Deployment Services and Active Directory Domain Services.. It should route all internet traffic from LAN to the internet and vice-versa. But LAN computers do not get internet connectivity.
We have tried using RIP but are stuck. It sends responses but doesn't receive any, the logs report there is a certificate error:
Failed to apply IP Security on port VPN2-113 because of error: A certificate could not be found. Connections that use the L2TP protocol over IPSec require the installation of a machine certificate, also known as a computer certificate.. No calls will be accepted to this port.
How can we solve this problem? What do we need to configure on the server so that LAN computers have internet connectivity?