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VPN Established betweeen two Linksys BEFSX41 routers, but cannot connect to remote network.

Posted on 2004-08-18
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Last Modified: 2010-04-12
I have two broadband networks; one is cable modem connected (call it net1), the other is DSL (net2).  Both broadband connections are DHCP assigned, however the net2 is assigned a private non-routable IP (ISP uses 172.x.x.x addressing).  Net1 utilizes dyndns.org to resolve to the current IP.  At each network a Linksys BEFSX41 sits behind the modem.  The local and remote secure nets on the VPN setups on both ends are configured for each other's full subnet.  Behind net1's router is a 10.0.1.0/24 network, and behind net2's router is a 10.0.2.0/24 network.  I can establish the VPN by letting net2's router initiate the connection to the dyndns.org FQDN.  Once connected however, I cannot ping 10.0.2.1 from a 10.0.1.x address, and vice versa.  Also tried http connections with no luck.

In the past, we used PPTP tunnels through the routers to create a server to server tunnel with no problem, but this needs to be hardware based now with no software based connections.

Any clues?
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Question by:CoreyClamp
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grblades earned 400 total points
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Being able to authenticate and establish the VPN but not being able to transfer data is a normal sympton of ip protocol number 50 (esp) being blocked. Contact your net2 ISP to ensure that esp is permitted.
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