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When I start the Cisco Client I get the error message "The necessary VPN sub-system is not available. You can not connect to the remote VPN server" is displayed and I can't log on.

Return to: ISTS FAQ Home > Wireless > Troubleshooting

This error message is consistent with a firewall on computer (e.g. Zone Alarm) blocking the connection from the VPN concentrator on the University network. To get around this problem you will need to:

• Configure your firewall to allow the Cisco connection.
• Turn off your firewall while connecting to the wireless network (not recommended).
• Use a PPTP connection instead (see User Guides and Software).

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