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Section 4 User Interface Guide Total Access 850 System Manual

FAR-END IP ADDRESS

This is the address of the NEXT hop router on this interface. This field is only visible when ADDRESS

ODE is set to USER SPECIFIED.

MTU

Specifies the maximum size for a packet transmitted on this PVC. Default is 1500. This field is only

valid when L2 protocol for this sub-interface is

FRE.

NAT

Use this menu to set up and use Network Address Translation on this interface.

PORT TRANSLATION

By enabling port translation, IP packets are modified as they pass through this interface. During

transmission, private addresses are translated into a single public (NAPT) IP address. Incoming

packets are translated from the public to private address based on the protocol port numbers.

Once enabled, additional menus appear and can be used to further customize the NAT

configuration. The default is

DISABLED.

PUBLIC IP ADDRESS MODE

Sets the public NAPT address used for translating. Choices are INTERFACE (default) and

SPECIFIED. Selecting INTERFACE configures NAT to use the IP address already specified on the

interface; the NAPT address and the interface address are the same. Using

SPECIFIED defines a

particular IP address used as the NAPT address.

PUBLIC IP ADDRESS

This menu only appears when the PUBLIC IP ADDRESS MODE is set to SPECIFIED, and allows the

user to enter a specific NAPT address.

TRANSLATE BODY OF UNMAPPED PARTS

Enabling this function forces NAPT to translate the body of any unmapped solicited traffic

originating from the LAN. Default is

DISABLED.

TRANSLATION TABLE

Table used for defining addresses and port translations. This is an indexed list of all translations

defined for the router. It specifies the translations for specified public addresses/ports to private

addresses/ports. To insert a new translation entry, highlight the index number of the first

translation and press the

<I> key. To delete a particular entry, highlight the index number of the

entry and press the

<D> key. The TRANSLATION TABLE parameter descriptions follow.