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Establishing a VPN session

By BPorter ·
We have recently installed an ISDN line in a remote office using a Cisco 800 series router and ZoneAlarm Pro for the firewalls.

I am trying to establish a MS VPN client session with our home office over the ISDN with no luck - we get an error 650- computer does not respond to network request. Prior to the ISDN, we ran the VPN over a dialup session with the ISP.

We have done this with no problems at our other locations. The firewall at the home office is configured to allow pptp trafficat port 1723.

I've been testing from a laptop that doesn't have ZoneAlarm loaded, so a local firewall isn't the problem. I can ping the gateway at our home office. I have normal internet access.

I've used this router at another remote site and don't remember needing to configure it specially for VPN.

Any thoughts? Could the ISP for my remote office need to do something to allow this traffic through?

TIA,

Byron

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Establishing a VPN session

by James R Linn In reply to Establishing a VPN sessio ...

The problem may be as simple as the ports that your VPN client wants are not currently enabled on your firewall. Thats what I would ensure first.

Or it could be as complicated as wether your firewall has NAT turned on. If it does, they may be a problem with the IPsec packets being passed through. In some firewalls, its a simple menu choice to allow IPsec passthrough, in others, its more complicated.

James

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Establishing a VPN session

by BPorter In reply to Establishing a VPN sessio ...

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Establishing a VPN session

by BPorter In reply to Establishing a VPN sessio ...

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