When to Disable SIP ALG to Fix VoIP Issues

SIP ALG is a technology that is available on most commercial routers, which is a networking device that forwards traffic to the Internet, or between local area networks (LANs). The “SIP” part refers to Session Initiation Protocol. This is an underlying service that powers all VoIP activity. For example, SIP registers devices, ensures call presence, and governs call audio. The "ALG" part refers to Application Layer Gateway. This is a network address translation (NAT) tool that changes private IP addresses and ports into public IP addresses and ports. It functions as a proxy to re-establish the destination addresses in data packets, which...