Nat Details Screen - Verilink T1 Reference Manual

Enable
Mode
Global IP Addr
Global Mask
ICMP Default Addr
Filter Non Local
Address
4-62 T 1 A c c e s s R o u t e r
NOTICE:
You must Save and Restart for any changes in NAT configuration
parameters to take effect.

NAT Details Screen

The NAT Details screen (Figure 4.58) lets the user configure the NAT global
parameters described below.
Figure 4.58 NAT Details Screen
Enables or disables NAT. Default is "Disable."
Selects the Network Address Port Translation (NAPT) mode or the Basic NAT
mode. In NAPT mode, all hosts on the Global (public) side view all hosts on
the Local (private) side as a single internet host (one IP address). In Basic
NAT mode, the Global IP address is assigned as a Class C host address (Mask
of 255.255.255.0). Each private IP address on the Local side is mapped to a
Class C public address on the Global side. In other words, if there are 30
hosts on the private (Local) side, 30 public (Global) addresses are required.
The default is NAPT.
Global IP Address used in NAPT mode. Must be a valid Class C address.
Default is LAN IP Address.
IP Mask associated with defined Global IP Address. Default is LAN IP Mask.
Default source address used to answer any ICMP request. Default is LAN IP
Address. ICMP requests are not transferred from the Global to the Local side.
Rather they are answered by the unit itself since Local addresses are private
and do not receive unsolicited requests.
Discards any packet with "non corporate" source address. Default is "Enable."
The screen parameters listed below are related to the NAT Control Block
Timer. Note that default values should be in accordance with most NAT