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This is the support site for Andrews & Arnold Ltd, a UK Internet provider. Information on these pages is generally for our customers but may be useful to others, enjoy!

VoIP Security: Difference between revisions

Mention "Check SIP User ID for incoming INVITE" - which is Grandstream's name for the feature
(Use the right Grandstream option - "Disable Direct IP calls" is for making calls, not receiving them)
(Mention "Check SIP User ID for incoming INVITE" - which is Grandstream's name for the feature)
 
Also some equipment may support the disabling of calls being sent direct from the Internet. For example, Grandstream firmware often has a feature ''Allow Incoming SIP Messages from SIP Proxy Only'', which is worth using (unless you need to accept such calls).
 
Your equipment may also support a feature whereby incoming INVITE messages are only accepted if they use the User ID which you used when registering with the SIP server, maybe named ''Check SIP User ID for incoming INVITE''. The SIP server will know this User ID, random SIP spammers will not.
 
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