VoIP Security: Difference between revisions
(Mention Grandstream's "Disable Direct IP calls". Just had my first dodgy SIP call - despite the firewall rules) |
(Use the right Grandstream option - "Disable Direct IP calls" is for making calls, not receiving them) |
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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 ''
[[File:aa-button.png|link=http://aa.net.uk/telecoms.html|Telecoms page on our main website]]
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