Deepak Mohan wrote:
> Regarding Proxy-Authenticate header field, on Pg. 53 of
> draft-ietf-sip-rfc2543bis-02, it says "It may also occur in a 401
> (Unauthorized) response if the request was forked."
>
> I'm not able to get the relation between forking and getting a
> Proxy-Authenticate header in a 401 response.
It's because a forking proxy is allowed to collect together
401s and 407s into one BIG 401/407. &:) See section 12.4.
HTH,
- Jo.
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