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Secure VPN connection

By stergios_nik ·
Hello.

We have a VPN connectivity problem.

We are trying to access a protected web site via VPN using the special CISCO VPN CLIENT software.

The user after installing the VPN client software gets the following error message while trying to connect:
"Secure VPN connection terminated locally by the client. Reason: Unable to contact the security gateway."

There are many problems because the IPSec protocol can not be used. We are using NT 4.0.

Everybody is using fake IP addresses inside LAN.

The user told me that he will need for now about 30 VPN concurrent connections.

I asked a technician and he told me that a hardware device (CISCO PIX Firewall 515E) is required for VPN connectivity.

Do we really need the firewall device in order to achieve the VPN connection?

Thank you in advance.

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by d.walker5 In reply to Secure VPN connection

Troublshooting VPN connection problem can be tricky. What's protecting the Web server? What OS is the WEB server running? Are you using PPTP? Do you have the necessary permission to access the Firewall protecting the Web server?

Your error message indicates that the client cannot connect to the server. You need to configure your client and the protecting firewall for PPTP. This requires allowing data that's destined to TCP port 1723 on web server and uses protocol 47. Also, be certain that the Web Server only requires user authentication for the VPN connection. PPTP connections are established by authenticating the user acconts provided for the connection.

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by -Q-240248 In reply to Secure VPN connection

Yes, you will need a VPN concentrator or device (not necessarily a PIX 515, but that works) on the public side of your network to terminate the VPN tunnels.

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by stergios_nik In reply to Secure VPN connection

The PROXY SERVER PC is running Windows NT 4.0 and a proxy software program. It has 2 network cards the first is assigned the real IP for communicatign with outside world and the second one is assigned an internal fake IP.

The gateway used is a CISCO router. Could we achieve VPN connection without installing a firewall?

Thank you in advance.

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by stergios_nik In reply to Secure VPN connection

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