SIP
VoIP
, , SIP, .
, - . - .
- , , IP- .
! , , . , . , .
, , SIP, - SIP . , , SIP .

:
- ;
- ;
- , Authorization, ;
- .
SIP . , . , .
, , , - .
, , SIP REGISTER, . , .
, Authorization REGISTER.
, Authorization :
- Authentication Scheme - ;
- Username - , . 3354;
- Realm - , ;
- Nonce Value - , , 401 . , , ;
- Authentication URI - . , , 123.45.67.89, SIP, 5060.
- Digest Authentication Response - , , . , .
SIP HTTP, HTTP , (Digest) . . , -, . , .
, VoIP realm , . , domain.com, Asterisk, - - asterisk.
RFC 2069, HTTP , response :
HA1 = MD5(username:realm:password) HA2 = MD5(method:digestURI) response = MD5(HA1:nonce:HA2)
, MD5 - : username
, realm
, password
(, ), method
, digestURI
nonce
response
, , , .
? , Authorization, , .
. , REGISTER, INVITE BYE.
. , , SIP 401 Unauthorized, , . realm
nonce
. :
, :

, , . , - . , BYE .
. , SIP . , SIP . , , . , Proxy-.
, :
- IP- SIP-;
- IP-, INVITE ;
- IP-, INVITE .;
Authorization . , - , : username
, realm
, method
, digestURI
, nonce
- response
username
, 1 .