What is the proper way to force kerberos to TCP?

Todd Grayson tgrayson at cloudera.com
Thu Oct 3 11:49:09 EDT 2019


On Thu, Oct 3, 2019 at 9:41 AM Greg Hudson <ghudson at mit.edu> wrote:

> On 10/3/19 11:11 AM, Todd Grayson wrote:
> > We are seeing a number of conflicting information sets on how to properly
> > force TCP by kerberos clients in CentOS/RH OS distributions.
> >
> > udp_preference_limit =0? 1?
> By my reading of the code, either should work (0 is not treated as a
> special value, but of course no messages will be a single byte, so 1
> should work as well).  I don't believe there are any other ways to force
> a TCP preference (or to disable UDP) using krb5.conf alone.

Todd Grayson
Customer Operations Engineering
Security SME

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