Enabling Internet access for VPN clients connected to an ISA firewall
A problematic situation with the ISA Server 2000 firewall was that once a VPN client connected to the ISA Server 2000 firewall, they could not connect to the Internet using their default SecureNAT client configuration.
The reason for this is that unless the VPN client was configured as a Web proxy or Firewall client of the ISA Server 2000 firewall to which they established the VPN link, the VPN client would not be able to access the Internet using their SecureNAT client connection to the ISA Server 2000 firewall/VPN server (when not configured as a Firewall or Web proxy client of the ISA Server 2000 firewall/VPN server, they’re by default SecureNAT clients).
By Thomas Shinder at ISA Server.
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