Zyxel ZyWALL 1100 [311/829] Chapter 14 alg

Zyxel USG 60W [311/829] Chapter 14 alg
Chapter 14 ALG
ZyWALL/USG Series User’s Guide
311
Figure 210 Configuration > Network > ALG
The following table describes the labels in this screen.
Table 132 Configuration > Network > ALG
LABEL DESCRIPTION
Enable SIP ALG Turn on the SIP ALG to detect SIP traffic and help build SIP sessions through the
ZyWALL/USG’s NAT. Enabling the SIP ALG also allows you to use the application
patrol to detect SIP traffic and manage the SIP traffic’s bandwidth (see Chapter 28
on page 468).
Enable SIP
Transformations
Select this to have the ZyWALL/USG modify IP addresses and port numbers
embedded in the SIP data payload.
You do not need to use this if you have a SIP device or server that will modify IP
addresses and port numbers embedded in the SIP data payload.
Enable Configure SIP
Inactivity Timeout
Select this option to have the ZyWALL/USG apply SIP media and signaling inactivity
time out limits.
SIP Media Inactivity
Timeout
Use this field to set how many seconds (1~86400) the ZyWALL/USG will allow a SIP
session to remain idle (without voice traffic) before dropping it.
If no voice packets go through the SIP ALG before the timeout period expires, the
ZyWALL/USG deletes the audio session. You cannot hear anything and you will need
to make a new call to continue your conversation.

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