Microsoft VPN Client through 857 ADSL Router

Answered Question
Nov 20th, 2009
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I have set up a cisco 857 adsl router using CP Express (web interface) with standard NAT and firewall settings.

router seems to work fine apart from outbound pptp connections.

I am unable to use the MS VPN client to connect to our PPTP server in a remote location. I am not trying to use the VPN facilities on the 857 router, just allow pass-through from my laptop behind the router to an external vpn server.

The client instantly goes to "Verifying Userbane and Password" then hangs on this for a minute or two before failing.

Any suggestions would be apprecated.



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gordonobrien Sun, 11/22/2009 - 17:05
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Thanks DP

The second link got me going in the right direction. It was the return GRE traffic that was being blocked.

I have never had to configure a firewall in the past where you have to manually allow return traffic for outbound rules!




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