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From: Richard Stallman <rms@gnu.org>
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Subject: Re: Bug#154252: krb5-clients: ftp gives spurious permanent error
Date: Fri, 26 Jul 2002 09:36:12 -0600 (MDT)
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    I just discovered that the problem is cured by using a "-u" option to
    ftp, instead of the normal "-n" that ange-ftp uses.

    "-u" means "do not auto-athenticate and do not auto-login"

You can set ange-ftp-ftp-program-args to specify -n.
Is that sufficient, or do you want some further feature?

    The way the kerberised ftp currently behaves is incompatible with ftp,
    and a program using it (ange-ftp) should first test it to see which
    version it is.  

I don't know whether this is a feasible thing to do, but if someone
implements it and it works smoothly, this would be good to install.