Chapter 18 ALG
Figure 236 Network > ALG
The following table describes the labels in this screen.
Table 108 Network > ALG
LABEL | DESCRIPTION |
Enable SIP | Turn on the SIP ALG to allow SIP sessions to pass through the ZyWALL. SIP is a |
Transformations | signaling protocol used in VoIP (Voice over IP), the sending of voice signals over |
| Internet Protocol. Enabling 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 | Turn on the H.323 ALG to allow H.323 sessions (used for audio communications) to |
transformations | pass through the ZyWALL. Enabling 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 |
|
|
|
| 329 |
ZyWALL USG 100/200 Series User’s Guide | |
|
|