ZyXEL Communications P-2602 Sip Alg, 2602HWL-DxA Series User’s Guide Port Forwarding Rule Setup

Models: P-2602

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P-2602H(W)(L)-DxA Series User’s Guide

Table 50 Port Forwarding Rule Setup (continued)

LABEL

DESCRIPTION

 

 

Apply

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

 

 

Cancel

Click Cancel to begin configuring this screen afresh.

 

 

10.5.2 SIP ALG

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 83 Network > NAT > ALG

Each field is described in the following table.

Table 51 Network > NAT > ALG

LABEL

DESCRIPTION

 

 

Enable SIP ALG

Select this to make sure SIP (VoIP) works correctly with port-forwarding and

 

address-mapping rules.

Apply

Click this to save your changes and to apply them to the ZyXEL Device.

 

 

Reset

Click this to return to previously saved configuration.

 

 

Chapter 10 Network Address Translation (NAT) Screens

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ZyXEL Communications P-2602 manual Sip Alg, 2602HWL-DxA Series User’s Guide Port Forwarding Rule Setup