ZyXEL Communications P-660 series Betriebsanweisung PDF herunterladen (Seite 79)

Chapter 6 Network Address Translation (NAT) Screens

P-660R-F1 Series User’s Guide

6.3 NAT General Setup

You must create a firewall rule in addition to setting up SUA/NAT, to allow traffic from the WAN to be

forwarded through the ZyXEL Device. Click Network > NAT to open the following screen. Not all

fields are available on all models.

Figure 42 NAT General

The following table describes the labels in this screen.

Table 25 NAT General

LABEL DESCRIPTION

Active

Network

Address

Translation

(NAT)

Select this check box to enable NAT.

SUA Only Select this radio button if you have just one public WAN IP address for your ZyXEL

Device.

Full Feature Select this radio button if you have multiple public WAN IP addresses for your ZyXEL

Device.

Max NAT/

Firewall

Session Per

User

When computers use peer to peer applications, such as file sharing

applications, they may use a large number of 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 each client computer 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

using all of the available NAT sessions.

Apply Click Apply to save your changes back to the ZyXEL Device.

Cancel Click Cancel to reload the previous configuration for this screen.

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ZyXEL Communications P-660 series Betriebsanweisung Seite 79