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6.4

VPN not working from public internet but does work from local outside the firewall...

Asked by slater27 in Virtual Private Networking (VPN)

Tags: 721, connections, error

Hopefully an easy question here...

First a quick synopsys of the background to the problem:

I have set up VPN access into my SBS2003 box. I had logged another question on experts-exchange because initially my tests could not connect through to the server. I was attempting to connect through to the VPN server by plugging directly into the ADSL router and putting the test notebook on the external 10.0.0.x network (thus attempting to replicate being outside the network). My internal network is 192.168.0.x. When testing in this manner I was using the actual public IP address however I could not connect. This was resolved when someone here said that I was testing it incorrectly and rather than put the external public static address I should be putting the 10.0.0.8 address which is to the "external NIC" on the SBS2003 box. I tried this and the VPN worked successfully. I thought the problem had therefore been solved...

However I now have had the opportunity to attempt to VPN from a real external internet connection and unfortunately I cannot connect through. I'm getting an Error 721.

I have ensured that my firewall is off on the client to be sure but no luck.

What's different from connecting via the 10.0.0.x address through the ADSL router and a public internet addresss going through the same ADSL router (obviously via the ADSL connection rather than directly into a port on the back of the router). I would have thought that both ways would still be routed by the routers same firewall routing rules? Or have I got this incorrect....??

Given that it works from the 10.0.0.x address the only difference is the source IP and the fact that the public IP is coming through the ADSL telephone link as opposed to a direct UTP connection into the router...

Any ideas?... I'm flying out tonight and need this resolved ASAP!!!...

Cheers.

View the Solution FREE for 30 Days

20091111-EE-VQP-92

VPN not working from public internet but does work from local outside the firewall...

Asked by slater27 in Virtual Private Networking (VPN)

Tags: 721, connections, error

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