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VoIP Security

24 bytes added, 16:54, 24 August 2019
Use the right Grandstream option - "Disable Direct IP calls" is for making calls, not receiving them
Solution: Firewall SIP as explained above.
Also some equipment may support the disabling of calls being sent direct from the Internet. For example, Grandstream firmware often has a feature ''DisableAllow DirectIncoming IPSIP callsMessages from SIP Proxy Only'', which is worth using (unless you need to accept such calls).
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