What does the "Restrict Peer to Peer Media / Signaling Connection" function do?

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Question:
What does the "Restrict Peer to Peer Media / Signaling Connection" function do?

Answer:
The “Restrict Peer to Peer Media / Signaling Connection” setting is a security feature.
When enabled, it prevents unauthorized or malicious traffic from the Internet from entering an active SIP session.

It ensures that only the original source and destination IP addresses involved in the SIP Media or SIP Signaling session are allowed to communicate, blocking all other IPs for security protection.