Chapter 18 ALG
The following table describes the labels in this screen.
Table 83 Network > ALG
LABEL | DESCRIPTION |
Enable SIP | SIP is a signaling protocol used in VoIP (Voice over IP), the sending of voice signals |
Transformations | over Internet Protocol. Turn on the SIP ALG to allow SIP sessions to pass through |
| the ZyWALL. |
| Using the SIP ALG allows you to use bandwidth management on SIP traffic. |
|
|
SIP Signaling | If you are using a custom UDP port number (not 5060) for SIP traffic, enter it here. |
Port |
|
|
|
Additional SIP | If you are also using SIP on an additional UDP port number, enter it here. |
Signaling port |
|
(UDP) for |
|
transformations |
|
|
|
SIP Media | Use this field to set how many seconds (1~86400) the ZyWALL will allow a SIP |
inactivity time | session to remain idle (without voice traffic) before dropping it. |
out | 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. |
|
|
SIP Signaling | Most SIP clients have an “expire” mechanism indicating the lifetime of signaling |
inactivity time | sessions. The SIP user agent sends registration packets to the SIP server |
out | 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). |
|
|
Enable H.323 | H.323 is a protocol used for audio communications over networks. |
transformations | Select this check box to turn on the H.323 ALG to allow H.323 sessions to pass |
| through the ZyWALL. |
| Using the H.323 ALG allows you to use bandwidth management on H.323 traffic. |
|
|
H.323 Signaling | If you are using a custom TCP port number (not 1720) for H.323 traffic, enter it here. |
Port |
|
|
|
Additional H.323 | If you are also using H.323 on an additional TCP port number, enter it here. |
Signaling port |
|
for |
|
transformations |
|
|
|
Enable FTP | Select this check box to allow FTP sessions to pass through the ZyWALL. FTP (File |
Transformations | Transfer Program) is a program that enables fast transfer of files, including large |
| files that may not be possible by |
| Using the FTP ALG allows you to use bandwidth management on FTP traffic. |
|
|
FTP Signaling | If you are using a custom TCP port number (not 21) for FTP traffic, enter it here. |
Port |
|
|
|
Additional FTP | If you are also using FTP on an additional TCP port number, enter it here. |
Signaling port |
|
for |
|
transformations |
|
|
|
Apply | Click Apply to save your changes back to the ZyWALL. |
|
|
Cancel | Click Cancel to begin configuring this screen afresh. |
|
|
270 |
| |
ZyWALL USG 1000 User’s Guide |
| |
|
|
|