Cayman Systems 2E-W, User Manual

Page: 89 / 170

Cayman 2E-W User’s Guide Using the Command Line Interface
November 2000
4-31
set ip wan restrictions { none | admin-disabled |
admin-only }
Specifies whether an administrator can open a Telnet connection to
the Cayman 2E-W over the WAN Ethernet interface to monitor and
configure the Cayman 2E-W. You can enable or disable administrator
access or specify that the WAN port can only be used for
administrative traffic. By default, administrative restrictions are
turned off, meaning an administrator can open a Telnet connection
through the WAN port.
If you specify admin-only access for the Cayman 2E-W
WAN port, you will turn off routing services through that
port. Do not turn on admin-only access without consulting
with your network administrator.
set ip wan addr-mapping { off | on }
Specifies whether network address translation (NAT) is enabled for
the WAN port on the Cayman 2E-W.
set ip wan proxy-arp { on | off }
Specifies whether you want the Cayman 2E-W to respond when the
it receives an address resolution protocol for devices behind it. By
default, proxy ARP is turned off.
Network Address
Translation (NAT)
Default Settings
NAT default settings let you specify whether you want your Cayman
2E-W 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
otherwise be discarded by the Cayman 2E-W should be directed to a
specific hosts.