Re: [squid-users] Max Challgenge Reuse

From: Kinkie <kinkie-squid@dont-contact.us>
Date: Wed, 03 Aug 2005 09:09:08 +0200

On Tue, 2005-08-02 at 18:18 -0300, Carlos Zottmann wrote:
> Hi !!
>
> We are having some problems with our domain controllers that is
> slowing down squid during peak ours, due to ntlm authentication.
>
> We considered changing the value of Max_Challeng_Reuse from 0 to some
> higher value, in order to decrease the load on the domain controllers
> coming from squid, but I would like to know what are the possible
> consequences, specially regarding performance, before actually
> commiting this change.

With max_challenge_reuse set to anything but 0, squid will perform a
replay attack on the NTLM authentication to increase authentication
performance.

Everything should work more or less fine (if you see failed auths you
may want to enable the helper-fail-open config option and helper flag -
be warned that doing so is a security compromise).

Also be aware that support for that feature is being removed from
squid-3.

        Kinkie
Received on Wed Aug 03 2005 - 01:09:22 MDT

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