User`s guide

Configuring Your Cayman 3220-H Cayman 3220-H User’s Guide
3-54 December 2000
After you have made this change, you will need to include this port
number when you open a Telnet connection to the Cayman 3220-H.
For example, if you change the Telnet port to 1023 on a Cayman
3220-H using its default IP address (192.168.1.254), you would
open a Telnet connection to the device by entering telnet
192.168.1.254 1023
in a DOS window or command line.
3. Use the NAT Default Host radio buttons to specify whether
you want your Cayman 3220-H to send NAT traffic it
would otherwise drop to a host on your network.
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 3220-H should be
directed to a specific hosts.
4. Use the Default Host Address field to specify the IP address
of the internal host to which NAT traffic should be
directed.
5. If you are finished, click the Save button to store your
modified configuration in the Cayman 3220-H memory.
6. Enter an identifier for the pinhole table entry in the Name
field.
You can identify table entries by protocol name (ftp, Telnet,
http), sequentially (1, 2, 3), by port number (21, 80, 23), or by
some other naming scheme.
7. Use the Protocol dropdown menu to select the type of
protocol (TCP, UDP, ICMP, or PPTP) you want to redirect.
If you want to redirect a protocol type other than TCP, UDP,
ICMP, or PPTP, use the second line of the table to enter the
protocol type name.