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In the default configuration the option Use Connection Settings is selected. With this option NAT is used for a connection between a local network an an Internet site. Therefore no additional settings are necessary in most cases.

When using the option Use Service Specific Settings a Unified Firewall offers numerous options for NAT configuration. Most commonly, only data traffic in the direction of the Internet is masked.



Using the option bidirectional also produces to provides a functional Internet connection. However, if you operate port forwarding, the sender address displayed is that of the Unified Firewall and not that of the original sender.

The option right-to-left prevents any Internet communication, since communication from the local network to the Internet is unmasked. Only incoming communication is masked.