-----Oorspronkelijk bericht----- Van: Paul van Schagen [mailto:paul.van.schagen@adaline.net] Verzonden: donderdag 21 april 2005 9:02 Aan: 'Josekutty K.K' Onderwerp: RE: [Sipforum-discussion] regarding Authentication... Methods you really want to authenticate are INVITE ( outgoing calls ) and REGISTER ( incoming calls ). You try the request first and the switch answers requesting authentication. Then the authentication is sent by the UA to the switch. Remember the authentication also verifies the IP address of the sender is correct. By doing a double request you make sure that the original request came from where they say it came from. Lets say somebody fakes an IP address and sents the packet to the switch. The switch then sends back an authentication requests which arrives at another destination. The call never gets authenticated correctly and is rejected. Hopes this helps Can anybody help me with my mediaproxy timeout ? Best regards Paul van Schagen -----Oorspronkelijk bericht----- Van: sipforum-discussion-bounces(a)lists.su.se [mailto:sipforum-discussion-bounces@lists.su.se] Namens Josekutty K.K Verzonden: donderdag 21 april 2005 8:47 Aan: sipforum-discussion(a)lists.su.se Onderwerp: [Sipforum-discussion] regarding Authentication... Hi all, I am a beginner in SIP. Let me explain my doubt. Once a SIP request authenticates itself, (usually a REGISTER request), all further requests MUST include the authorization details .. I mean I MUST send the authorization details to subsequent requests say OPTIONS, INVITE etc . Or Should I try each request without authentication first? Regards Josekutty K K ------ To unsubscribe from the Sipforum-discussion mailing list visit https://mbox.su.se/mailman/listinfo/sipforum-discussion