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ASUS N66U with VPN Client on WAN interface, disable traffic when VPN server connection is down (self.networking)

submitted 1 month ago by jaybone to c/[email protected]

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I have an ASUS N66U

I have configured the WAN interface to use a VPN Client to connect to a 3rd party VPN Server, so that all NAT LAN connected device traffic is routed through the 3rd party VPN server.

But if the 3rd party VPN server goes down, or the connection is otherwise lost or broken, the Asus N66U will route directly from the WAN connection using e.g. my ISP.

How can I stop my Asus N66U from routing any traffic on the WAN port if the VPN connection is down?

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[–] [email protected] 2 points 1 month ago* (last edited 1 month ago) (1 children)

I accomplished this by setting a firewall rule to block all outbound traffic on that interface except to the VPN and the LAN.

[–] jaybone 1 points 1 month ago

Thanks! That makes sense. I’ll give this a try.