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Lesson 4. Setting Up Gateway Services > Virtual Private Networking - Pg. 100

Setting Up Gateway Services 100 NAT automatically adds a divert firewall rule to transfer incoming packets to the NAT process. In order for the divert rule to function, the firewall service must be turned on. Because the default "deny everything" rule is also activated, all incoming and outgoing connections are blocked. Thus, you need additional firewall rules to allow traffic through the server. NOTE The only form of NAT that you can start in Server Admin is PAT. NAT-Service Monitoring The NAT Overview pane in Server Admin enables you to monitor your NAT service for trouble- shooting and security purposes. You can see if the service is running and how many TCP, User Datagram Protocol (UDP), and Internet Control Message Protocol (ICMP) links are active. In addition to monitoring active protocol links in the Overview pane, you might want to view NAT packet divert events, which the firewall service logs. Virtual Private Networking A virtual private network (VPN) provides a solution for encrypting transactions. VPN is a way to use an unsecure network, such as the Internet, as the transit for private network traffic. This traffic re- mains private because the transactions are encrypted. The result is that you can remotely connect to a private network as if the remote computer were attached directly to that private network.