[38815] in Kerberos
Re: kerberos and web authentication
daemon@ATHENA.MIT.EDU (Rita)
Fri Aug 21 20:07:00 2020
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From: Rita <rmorgan466@gmail.com>
Date: Fri, 21 Aug 2020 20:04:24 -0400
Message-ID: <CAOF-KfjFUB90JzpmMUDCFRQrRPAfxTZiOc8a8pSmDmZS5jEe=w@mail.gmail.com>
To: Benjamin Kaduk <kaduk@mit.edu>
Cc: kerberos@mit.edu
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hi
The webserver has DNS aliases but not multiple IPs. On a client level is it
possible to disable the reverse lookup? I am not sure if its backed up a
pool of servers -- is there a way to find out from a client?
On Fri, Aug 21, 2020 at 7:30 PM Benjamin Kaduk <kaduk@mit.edu> wrote:
> On Thu, Aug 13, 2020 at 07:10:42AM -0400, Rita wrote:
> > I created a user keytab. I use curl to authenticate against a web server.
> > `curl -u : --negotitate` it works randomly (about 33% accuracy). I am
> > trying to figure out if its a webserver issue or kerberos issue. Is there
> > anything else I can do?
>
> There's (at least) a couple things that can come into play for this sort of
> scenario (not least because HTTP Negotiate violates some fundamental
> assumptions about message- vs. connection-oriented):
>
> Does the web server's hostname have multiple IP addresses in the DNS? (Is
> reverse DNS used for principal canonicalization by the krb5 library? The
> default is "yes" in many versions.)
>
> Does the web server have a pool of backend servers behind a load balancer?
>
> -Ben
>
--
--- Get your facts first, then you can distort them as you please.--
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