There is never a response to an ACK. Therefore a proxy or user agent cannot challenge an ACK. If a challenge was appropriate, it would have occurred for the INVITE.
(-:bob Robert F. Penfield Chief Software Architect Acme Packet, Inc. 130 New Boston Street Woburn, MA 01801 [EMAIL PROTECTED] ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, January 07, 2002 1:04 PM Subject: [Sip-implementors] Authentication on ACK > > In "draft-ietf-sip-rfc2543bis-05" pag 82 I read: > "Any time a proxy server or user agent receives a request, they MAY challenge > the initiator of the response to provide assurance of their identity" > > Certainly it is valid for Register, Invite, Bye, Cancel and Option. > Is it valid for ACk too? > > Can a proxy require an authentication on a ACK request? > > Thanks > Lorenzo > > > ___________________________________________ > > Lorenzo Boffelli > STRE Engineer > > Allied Telesis K.K. > Head Office / 4F TOC Bldg, 7-22-17 Nishi-Gotanda, > Shinagawa-ku, Tokyo Japan, 141-8635 > European R&D Center > Piazza Tirana, 24/4 b Phone: +39 02 41411201 > 20147 Milano Fax: +39 02 41411260 > ITALY > Email: [EMAIL PROTECTED] > ___________________________________________ > _______________________________________________ > Sip-implementors mailing list > [EMAIL PROTECTED] > http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
