Network Address Translation (Nat) Default Settings - Cayman Systems 3220-H User Manual

Network Address
Translation (NAT)
Default Settings
Using the Command Line Interface
4-36
binary IP address represent network information. The default subnet
mask for most networks is 255.255.255.0 (Class C subnet mask).
set ip wan vccn restrictions
{ admin-disabled | admin-only | none }
Specifies whether an administrator can open a Telnet connection to
the Cayman 3220-H over the specified VCC interface to monitor and
configure the Cayman 3220-H. For security reasons, administrative
access is disabled by default, meaning an administrator cannot open
a Telnet connection through the WAN port. The
argument means that router traffic is ignored but that administrative
commands are accepted. The
accepted.
If you specify admin-only access for the Cayman 3220-H,
you will turn off routing services through that interface.
Do not turn on admin-only access without consulting your
network administrator.
set ip wan vccn addr-mapping { off | on }
Specifies whether network address translation (NAT) is enabled for
the specified VCC interface on the Cayman 3220-H.
set ip wan vccn proxy-arp { on | off }
Specifies whether you want the Cayman 3220-H to respond when it
receives an address resolution protocol for devices behind it. By
default, proxy ARP is turned off.
NAT default settings let you specify whether you want your Cayman
3220-H to forward NAT traffic to a default server when it doesn't
know what else to do with it. The NAT default host function is useful
in situations where you cannot create a specific NAT pinhole for a
traffic stream because you cannot anticipate what port number an
application might use. For example, some network games select
arbitrary port numbers when a connection is being opened. By
identifying your computer (or another host on your network) as a
NAT default server, you can specify that NAT traffic that would
admin-only
argument means that all traffic is
none
Cayman 3220-H User's Guide
December 2000