User`s guide

Chapter 19 ALG Screens
LAN-Cell 2 User’s Guide
370
Figure 226 ADVANCED > ALG
The following table describes the labels in this screen.
Table 143 ADVANCED > ALG
LABEL DESCRIPTION
Enable FTP
ALG
Select this check box to allow FTP sessions to pass through the LAN-Cell. FTP (File
Transfer Program) is a program that enables fast transfer of files, including large
files that may not be possible by e-mail.
Enable H.323
ALG
Select this check box to allow H.323 sessions to pass through the LAN-Cell. H.323
is a protocol used for audio communications over networks.
Enable SIP
ALG
Select this check box to allow SIP sessions to pass through the LAN-Cell. SIP is a
signaling protocol used in VoIP (Voice over IP), the sending of voice signals over
Internet Protocol.
SIP 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 LAN-Cell.
If the SIP client does not have this mechanism and makes no calls during the LAN-
Cell SIP timeout (default 60 minutes), the LAN-Cell SIP ALG drops any incoming
calls after the timeout period. Enter the SIP signaling session timeout value.
Apply Click Apply to save your changes back to the LAN-Cell.
Reset Click Reset to begin configuring this screen afresh.