User guide

030-300564 Rev A 43 August 2009
User Guide ProLine G90
(
Models 6100
,
6110
)
12.2.1 ALG
The following screen will appear if you select Security > Services > ALG from the main menu. This screen enables
you to configure application-layer modem (ALG) services for your modem by clicking on the check box of each
service that you want to enable (a check mark will appear in the box). If you change the settings in this screen, click
apply and then OK. If you click Cancel, the screen will return to its previous settings.
Enabling an ALG service opens the IP ports associated with the corresponding service. For example, if you have an
IPSec client running on a LAN-side PC attached to the modem, it is necessary to enable the IPSec ALG. Enabling
IPSec opens the default ports used by IPSec, 500 and 1500, so that traffic to and from the IPSec client may pass
through.
NOTE: When the firewall level is set to “High,” some services may not be configurable.
FTP Click this check box to enable the FTP ALG.
H323 Click this check box to enable the H323 ALG.
TFTP Click this check box to enable the TFTP ALG.
PPTP Click this check box to enable the PPTP ALG.
IPSec Click this check box to enable the IPSec ALG.
SIP Click this check box to enable the SIP ALG.