UDP forwarding over VPN

Unanswered Question
Nov 9th, 2007

I need to forward UDP broadcasts to/from the lan subnet and the vpn clients. I've found the command ip forward-protocol, but all the documentation seems to make it look like it requires a physical interface on both sides. Is there a way to relay/forward udp broadcasts over the vpn?


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Anonymous (not verified) Thu, 11/15/2007 - 14:26

For mutilcast and and broadcast traffic, if you are doing router to router (LAN to LAN) VPN, you can use GRE tunnel with IPSEC.

Merrill.Hammond Thu, 11/15/2007 - 16:53


Thanks for the reply... However, I need software vpn clients (IE, a laptop out and about connecting on the internet) to be able to send and receive the UDP broadcasts. Is this possible, or will I need to set up routers/pixes/asa's for each site?


wimccall Thu, 11/15/2007 - 20:25

I would implement a solution with L2TP to work in conjunction with IPsec. This method would allow all broadcast packets to reach your clients.


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