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Hi Brian,

Thanks and yes that is what I meant, and I think we already had a campaign to ask sites to use subjectAltName...

In terms of disallowing delegation if client choose to trust DNS, I tend to think it is the client's responsibility to do what is right, not ours. But I don't think I have a strong preference one way or the other. Perhaps such a stricter rule will also help reduce negative PR down the road. So ... OK.

regards,
--
Wei Yang  |  [log in to unmask]  |  650-926-3338(O)

?-----Original Message-----
From: Brian P Bockelman <[log in to unmask]>
Reply-To: xrootd/xrootd <[log in to unmask]>
Date: Thursday, October 25, 2018 at 7:24 AM
To: xrootd/xrootd <[log in to unmask]>
Cc: Subscribed <[log in to unmask]>
Subject: Re: [xrootd/xrootd] xrdcopy ignores subject alternative names from the x509 host certificate  (#841)

    Hi 
    @msalle <https://github.com/msalle> -
    I interpreted Wei's input as basically "do RFC2818 first; emit a warning; then, based on configuration, decide whether to fallback to DNS (and/or other overrides)".
    The only "tweak" I'd make is to disallow the client from delegating proxies (e.g., a new use case) if it trusted DNS. As we add proxy delegation to the Xrootd client, I'd prefer to start out right.
    Brian
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