Verilink WANsuite 6450, Reference Manual

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W e b S e r v e r I n t e r f a c e 3-63
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 Addr Global IP Address used in NAPT mode. Must be a valid Class C address.
Default is LAN IP Address.
Global Mask IP Mask associated with defined Global IP Address. Default is LAN IP Mask.
ICMP Default Addr 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.
Filter Non Local
Address
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
applications. The timers’ values minimize NAT resources. Generally, when a
timer has expired, the resources used are no longer needed. Those resources
will then be available for other connection resources.
IP Entry Timer The maximum time (in seconds) NAT will use resources when not using
TCP, UDP, or ICMP.
Values: 0
−
65535
Default: 120
TCP Connection Timer The maximum time (in seconds) NAT will use resources when attempting to
establish a TCP connection.
Values: 0
−
65535
Default: 300
TCP Closing Timer The maximum time (in seconds) NAT will use resources when attempting to
close a TCP connection.
Values: 0
−
65535
Default: 0
TCP Disconnected
Timer
The maximum time (in seconds) NAT will use resources when attempting to
disconnect from TCP.
Values: 0
−
65535
Default: 120