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Configuring the SCCP ALG—Quick Configuration

You can use J-Web Quick Configuration to quickly configure SCCP ALG Parameters

Before You Begin
For background information, read Understanding the SCCP ALG

Figure 83 shows the SCCP ALG configuration page.

Figure 83: SCCP ALG Configuration

Image QC_alg_sccp.gif

To configure the SCCP ALG with Quick Configuration:

In the J-Web user interface, select Configuration > Quick Configuration > ALG > VoIP ALG.
Select the SCCP tab if it is not selected.
Enter your parameter settings as described in Table 82 and click one of the following buttons:
- To apply the configuration and stay on the Quick Configuration page, click Apply.
- To apply the configuration and return to the main Configuration page, click OK.
- To cancel your entries and return to the main page, click Cancel.

Table 82: SCCP ALG Configuration Options

Enable SCCP ALG	Enables or disables the SCCP ALG.	Click the check box.
Inactive Media Timeout	Indicates the maximum length of time (in seconds) a call can remain active without any media (RTP or RTCP) traffic within a group. Each time an RTP or RTCP packet occurs within a call, this timeout resets. When the period of inactivity exceeds this setting, the Skinny Client Control Protocol (SCCP) ALG the gates opened for media are closed.	Select a value from 10 to 600 seconds.
Call Flood Threshold	Protect Skinny Client Control Protocol (SCCP) ALG clients from flood attacks by limiting the number of calls they attempt to process	Select a value from 2 to 1,000.
Permit NAT Applied Unknown Message	Specifies how unidentified SCCP messages are handled by the J-series device. The default is to drop unknown (unsupported) messages. Permitting unknown messages can compromise security and is not recommended. However, in a secure test or production environment, this statement can be useful for resolving interoperability issues with disparate vendor equipment. By permitting unknown SCCP (unsupported) messages, you can get your network operational and later analyze your VoIP traffic to determine why some messages were being dropped. This statement applies only to received packets identified as supported VoIP packets. If a packet cannot be identified, it is always dropped. If a packet is identified as a supported protocol, the message is forwarded without processing.	Click the check box.
Permit Routed Unknown Message	Specifies that unknown messages be allowed to pass if the session is in Route mode. (Sessions in Transparent mode are treated as Route mode.)	Click the check box.

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