[VoiceOps] Billing of Forwarded Calls

Alex Balashov abalashov at evaristesys.com
Wed Nov 11 16:49:44 EST 2009

Lee Riemer wrote:

> What's wrong with authenticating BYEs and CANCELs?  I see them as just 
> as important as an INVITE.  Anyone can some around, sniff the dialog and 
> spoof a BYE or CANCEL.

They'd have to spoof a Call-ID, From and To tags, correct CSeqs, any 
loose-routing parameters present in the Route and/or Record-Route 
headers, and the Route header itself.

I suppose it *could* be done... but...

Alex Balashov - Principal
Evariste Systems
Web     : http://www.evaristesys.com/
Tel     : (+1) (678) 954-0670
Direct  : (+1) (678) 954-0671

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