ZyXEL Communications ZyWall USG 2000 User Manual page 298

Chapter 18 ALG
Table 90 Network > ALG (continued)
LABEL
SIP Media
inactivity time
out
SIP Signaling
inactivity time
out
SIP Signaling
Port
H.323 Setting
Enable H.323
transformations
H.323 Signaling
Port
Additional H.323
Signaling port
for
transformations
FTP Setting
Enable FTP
Transformations
FTP Signaling
Port
298
DESCRIPTION
Use this field to set how many seconds (1~86400) the ZyWALL 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 deletes the audio session. You cannot hear
anything and you will need to make a new call to continue your
conversation.
Most SIP clients have an "expire" mechanism indicating the lifetime of
signaling sessions. The SIP user agent sends registration packets to
the SIP server periodically and keeps the session alive in the ZyWALL.
If the SIP client does not have this mechanism and makes no calls
during the ZyWALL SIP timeout, the ZyWALL deletes the signaling
session after the timeout period. Enter the SIP signaling session
timeout value (1~86400).
If you are using a custom UDP port number (not 5060) for SIP traffic,
enter it here.
Configuring port numbers for SIP traffic here also configures the
application patrol feature to use the same port numbers for SIP traffic.
Click the Add icon to add another custom UDP port number for SIP
traffic. You can have a total of up to eight.
Click the Remove icon to delete a custom UDP port number for SIP
traffic.
Turn on the H.323 ALG to detect H.323 traffic and help build H.323
sessions through the ZyWALL's NAT. The ZyWALL modifies IP
addresses and port numbers embedded in the H.323 data payload.
Enabling the H.323 ALG also allows you to use the application patrol to
detect H.323 traffic and manage the H.323 traffic's bandwidth (see
Chapter 29 on page 443
If you are using a custom TCP port number (not 1720) for H.323
traffic, enter it here.
If you are also using H.323 on an additional TCP port number, enter it
here.
Turn on the FTP ALG to detect FTP traffic and help build FTPsessions
through the ZyWALL's NAT. The ZyWALL modifies IP addresses and
port numbers embedded in the FTP data payload. Enabling the FTP ALG
also allows you to use the application patrol to detect FTP traffic and
manage the FTP traffic's bandwidth (see
the application partol).
If you are using a custom TCP port number (not 21) for FTP traffic,
enter it here.
for the application partol).
Chapter 29 on page 443
ZyWALL USG 2000 User's Guide
for