Zyxel ZyWALL 1100 [312/829] Chapter 14 alg

Zyxel ZyWALL 1100 [312/829] Chapter 14 alg
Chapter 14 ALG
ZyWALL/USG Series User’s Guide
312
SIP Signaling Inactivity
Timeout
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/USG.
If the SIP client does not have this mechanism and makes no calls during the
ZyWALL/USG SIP timeout, the ZyWALL/USG deletes the signaling session after the
timeout period. Enter the SIP signaling session timeout value (1~86400).
Restrict Peer to Peer
Signaling Connection
A signaling connection is used to set up the SIP connection.
Enable this if you want signaling connections to only arrive from the IP address(es)
you registered with. Signaling connections from other IP addresses will be dropped.
Restrict Peer to Peer
Media Connection
A media connection is the audio transfer in a SIP connection.
Enable this if you want media connections to only arrive from the IP address(es)
you registered with. Media connections from other IP addresses will be dropped.
SIP Signaling Port If you are using a custom UDP port number (not 5060) for SIP traffic, enter it here.
Use the Add icon to add fields if you are also using SIP on additional UDP port
numbers.
Additional SIP Signaling
Port (UDP) for
Transformations
If you are also using SIP on an additional UDP port number, enter it here.
Enable H.323 ALG Turn on the H.323 ALG to detect H.323 traffic (used for audio communications) and
help build H.323 sessions through the ZyWALL/USG’s NAT. 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 28 on page 468).
Enable H.323
Transformations
Select this to have the ZyWALL/USG modify IP addresses and port numbers
embedded in the H.323 data payload.
You do not need to use this if you have a H.323 device or server that will modify IP
addresses and port numbers embedded in the H.323 data payload.
H.323 Signaling Port If you are using a custom TCP port number (not 1720) for H.323 traffic, enter it
here.
Additional H.323
Signaling Port for
Transformations
If you are also using H.323 on an additional TCP port number, enter it here.
Enable FTP ALG Turn on the FTP ALG to detect FTP (File Transfer Program) traffic and help build FTP
sessions through the ZyWALL/USG’s NAT. Enabling the FTP ALG also allows you to
use the application patrol to detect FTP traffic and manage the FTP traffic’s
bandwidth (see Chapter 28 on page 468).
Enable FTP
Transformations
Select this option to have the ZyWALL/USG modify IP addresses and port numbers
embedded in the FTP data payload to match the ZyWALL/USG’s NAT environment.
Clear this option if you have an FTP device or server that will modify IP addresses
and port numbers embedded in the FTP data payload to match the ZyWALL/USG’s
NAT environment.
FTP Signaling Port If you are using a custom TCP port number (not 21) for FTP traffic, enter it here.
Additional FTP Signaling
Port for
Transformations
If you are also using FTP on an additional TCP port number, enter it here.
Apply Click Apply to save your changes back to the ZyWALL/USG.
Reset Click Reset to return the screen to its last-saved settings.
Table 132 Configuration > Network > ALG (continued)
LABEL DESCRIPTION

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