There's currently a proposal floating around to formalise a Forwarded-For header, with the same semantics as X-Forwarded-For, but with IPv6 support and perhaps more.
See:
http://tools.ietf.org/html/draft-petersson-forwarded-for-00
Currently being discussed a fair amount on the HTTP WG list, starting at:
http://lists.w3.org/Archives/Public/ietf-http-wg/2011AprJun/0024.html
Cheers,
-- Mark Nottingham mnot_at_yahoo-inc.comReceived on Tue Apr 12 2011 - 00:09:40 MDT
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