Port Forwarding; Figure 83 Nat General; Table 52 Nat General - ZyXEL Communications P-662H-61 User Manual

Figure 83 NAT General

The following table describes the labels in this screen.

Table 52 NAT General

LABEL
Active
Network
Address
Translation
(NAT)
SUA Only
Full Feature
Max NAT/
Firewall
Session Per
User
Enable SIP
ALG
Apply
Cancel

9.4 Port Forwarding

A port forwarding set is a list of inside (behind NAT on the LAN) servers, for example, web or
FTP, that you can make visible to the outside world even though NAT makes your whole
inside network appear as a single computer to the outside world.
P-662H/HW-D Series User's Guide
Chapter 9 Network Address Translation (NAT) Screens
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.
Select this check box to allow SIP sessions to pass through the ZyXEL Device. SIP is
a signaling protocol used in VoIP (Voice over IP), the sending of voice signals over
Internet Protocol.
Click Apply to save your changes back to the ZyXEL Device.
Click Cancel to return to the previous configuration.
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