Packets droped because of spoofing on site-to-site VPN

Hi!

We've just set up a new site and created a site-to-site VPN Connection between our main Office and this new site. Everything connects fine, but when we try to Transfer data if Fails. In the logs we can see that our packets are being droped with the following error message: "A packet was dropped because Forefront TMG determined that the source IP address is spoofed."

After searching the Internet I'm pretty sure the Problem is that we don't have a static route defined in the Windows Routing table. The TMG Settings seem to be fine though.

My Problem: how do I set a static route for a VPN Connection? After all I don't have a Gateway to route through. Any ideas?

Regards,


February 11th, 2015 2:49pm

Hi,

Please check the article "Configure Routing on a VPN Server"

Configuring static routes on the server:

For the Gateway, if the interface is a physical network interface, then enter the next hop address to which packets for the target address range are to be forwarded. If the interface is a demand-dial interface, then do not configure the gateway parameter.

Best Regards,

Joyce

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February 12th, 2015 4:45am

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