User`s guide

Cayman 3220-H User’s Guide Using the Command Line Interface
December 2000 4-37
otherwise be discarded by the Cayman 3220-H should be directed to
a specific hosts.
set nat-default option { off | on }
Specifies 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.
set nat-default address ip-address
Specifies the IP address of the default NAT server.
Network Address
Translation (NAT)
Pinhole Settings
NAT pinholes let you pass specific types of network traffic through
the NAT interfaces on the Cayman 3220-H. NAT pinholes allow you
to route selected types of network traffic, such as FTP requests or
HTTP (Web) connections, to a specific host behind the Cayman
3220-H transparently.
To set up NAT pinholes, you identify the type(s) of traffic you want
to redirect by port number, and you specify the internal host to
which each specified type of traffic should be directed.
The following list identifies protocol type and port number for
common TCP/IP protocols:
 FTP (TCP 21)
 Telnet (TCP 23)
 SMTP (TCP 25),
 TFTP (UDP 69)
 SNMP (TCP 161, UDP 161)
set pinhole name name
Specifies the identifier for the entry in the router's pinhole table. You
can name pinhole table entries sequentially (1, 2, 3), by port number
(21, 80, 23), by protocol, or by some other naming scheme.