The Port Forwarding Screen; Table 44 Network > Nat > General - ZyXEL Communications P-660HN User Manual

The following table describes the labels in this screen.
Table 44 Network > NAT > General
LABEL
Active Network
Address
Translation (NAT)
SUA Only
Full Feature
Max NAT/Firewall
Session Per User
Apply
Cancel

8.3 The Port Forwarding Screen

This screen is available only when you select SUA only in the NAT > General
screen.
Use this screen to forward incoming service requests to the server(s) on your local network.
You may enter a single port number or a range of port numbers to be forwarded, and the local
IP address of the desired server. The port number identifies a service; for example, web service
is on port 80 and FTP on port 21. In some cases, such as for unknown services or where one
server can support more than one service (for example both FTP and web service), it might be
better to specify a range of port numbers. You can allocate a server IP address that corresponds
to a port or a range of ports.
The most often used port numbers and services are shown in
refer to RFC 1700 for further information about port numbers.
P-660HN-Fx User's Guide
DESCRIPTION
Select this check box to enable NAT.
Select this radio button if you have just one public WAN IP address for your ZyXEL
Device.
Select this radio button if you have multiple public WAN IP addresses for your
ZyXEL Device.
When computers use peer to peer applications, such as file sharing applications,
they need to establish NAT sessions. If you do not limit the number of NAT
sessions a single client can establish, this can result in all of the available NAT
sessions being used. In this case, no additional NAT sessions can be established,
and users may not be able to access the Internet.
Each NAT session establishes a corresponding firewall session. Use this field to
limit the number of NAT/Firewall sessions client computers can establish through
the ZyXEL Device.
If your network has a small number of clients using peer to peer applications, you
can raise this number to ensure that their performance is not degraded by the
number of NAT sessions they can establish. If your network has a large number of
users using peer to peer applications, you can lower this number to ensure no
single client is exhausting all of the available NAT sessions.
Click this to save your changes.
Click this to restore your previously saved settings.
Chapter 8 Network Address Translation (NAT)
Appendix E on page 371. Please
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