Chapter 3: Terminal Menu Operation and Structure

communication across NAT must be initiated from the LAN side of the Ex- press L768/L1.5. Web Server allows a single machine on the NAT side to be accessed from the Internet side of NAT. This provides outside access to a web- server, mail, or ftp server.

NAT/Default IP

This is the IP address used by the Express L768/L1.5 for Network Address Translation when nothing is assigned during the PPP negotiation when PPP mode is active or when nothing is specified in the DLCI Mapping’s Link IP Address.

IP/DNS

The Domain Name Server parameters used by the Express L768/L1.5 are spec- ified here. The DNS server addresses can be exchanged between PPP peers. When a connection occurs and IPCP is negotiated, the Express L768/L1.5 will get the DNS server addresses from the PPP peer. If the configured DNS server addresses (Server 1 and Server 2) are all zeros, the addresses from the PPP peer are used. In NAT mode, the PPP peer’s DNS addresses are always used. The DNS addresses set in Server 1 and Server 2 are offered to a PPP peer if so requested.

DNS/Domain Name

Write security: 3; Read security: 5

This is a text string used to represent the domain name used by the Express L768/L1.5.

DNS/Server 1

Write security: 3; Read security: 5

This is the IP address for the primary DNS device. It is the first server that do- main name requests are sent.

DNS/Server 2

Write security: 3; Read security: 5

This is the IP address for the secondary DNS device. It is used as a back-up in case the primary address does not respond to the request.

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Express L768/L1.5 User Manual

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ADTRAN L768 user manual NAT/Default IP, DNS/Domain Name, DNS/Server