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Use routers to create packets with specific source IP address

August 21st, 2014

I have setup many VPN connections. There is 1 problem that I deal with a lot is the traffic from the other side of the VPN. Usually I have to wait for the other companies to send their traffic through the VPN. It sometime hard to tell where the problem is.

I found a way to use a router to send out packets , pretending it’s the other side of the VPN leg

To do this, first I need to replace the VPN appliance with the router and create a loopback interface

Where 172.69.24.12 is the source of the packets

Then run the following commands

Where 172.16.111.50 443 is the destination address and port on my network.

Now I can test and confirm my own VPN leg without waiting for other parties.

Categories: Networking

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