I am going to install 2 VoIP ATA running SIP to my VoIP provider.
After Setting up QoS, I noticed the Security > VoIP > SIP tab,
How useful is it? Should I enable it?
Description is as follow:
Since opening all ports within the dynamic range would cause a severe security issue, the firewall is able to handle SIP traffic on an intelligent basis. This is achieved by means of a special connection tracking helper monitoring the control channel to determine which dynamic ports are being used and then only allowing these ports to pass traffic when the control channel is busy. For that purpose you must specify both a SIP server and a client network definition in order to create appropriate packet filter rules enabling the communication via the SIP protocol.
Anyone has experiance with it?
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