TP-Link Deco X20-4g User Manual page 37

Reserve IP addresses for specific
devices to recognize and manage
the device more easily.
Set up port forwarding rules to
enable devices in your network
accessible over the internet with
safety.
Register a TP-Link DDNS domain
name to access your router and
local servers using a domain name.
Enable SIP ALG to communicate
with SIP (Session Initiation Protocol)
servers via NAT).
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