ZyXEL Communications P-660 series Guide de l'utilisateur télécharger pdf (Page 83)

Chapter 6 Network Address Translation (NAT) Screens

P-660R-F1 Series User’s Guide

The following table describes the fields in this screen.

6.6 The SIP ALG Screen

Some NAT routers may include a SIP Application Layer Gateway (ALG). A SIP ALG allows SIP calls

to pass through NAT by examining and translating IP addresses embedded in the data stream.

When the ZyXEL Device registers with the SIP register server, the SIP ALG translates the ZyXEL

Device’s private IP address inside the SIP data stream to a public IP address. You do not need to

use STUN or an outbound proxy if your ZyXEL Device is behind a SIP ALG.

Use this screen to enable and disable the SIP (VoIP) ALG in the ZyXEL Device. To access this

screen, click Network > NAT > ALG.

Figure 46 Network > NAT > ALG

Table 28 Port Forwarding Rule Setup

LABEL DESCRIPTION

Active Click this check box to enable the rule.

Service Name Enter a name to identify this port-forwarding rule.

Start Port Enter a port number in this field.

To forward only one port, enter the port number again in the End Port field.

To forward a series of ports, enter the start port number here and the end port

number in the End Port field.

End Port Enter a port number in this field.

To forward only one port, enter the port number again in the Start Port field above

and then enter it again in this field.

To forward a series of ports, enter the last port number in a series that begins with

the port number in the Start Port field above.

Server IP

Address

Enter the inside IP address of the server here.

Back Click Back to return to the previous screen.

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

Cancel Click Cancel to begin configuring this screen afresh.

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ZyXEL Communications P-660 series Guide de l'utilisateur Page 83