User`s guide

Configuring Your Cayman 3220-H Cayman 3220-H User’s Guide
3-52 December 2000
4. Enter your new password again in the Repeat Password
field.
You repeat the new password to verify that you entered it
correctly the first time.
5. When you are finished, click the Save button to store your
modified configuration in the Cayman 3220-H memory.
Configuring
Pinhole Settings
Network Address Translation (NAT) pinholes let you pass specific
types of network traffic through the router's NAT interfaces. NAT
pinholes allow you to route selected types of network traffic, such as
FTP requests or HTTP (Web) connections, to a specific host on the
Cayman 3220-H’s LAN network 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)
Establishing pinholes to allow access through the router to internal
hosts can create potential security risks. You should implement
internal network security measures to prevent unauthorized access by
outside users.
To display the Pinhole Configuration window (Figure 3-16), click the
Pinhole button on the Cayman 3220-H Home Page. You must be in
Expert Mode to open the Pinhole Configuration window.