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VoIP Security

236 bytes added, 15:55, 24 August 2019
Mention Grandstream's "Disable Direct IP calls". Just had my first dodgy SIP call - despite the firewall rules
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 ''Disable Direct IP calls'', which is worth using (unless you need to accept such calls).
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