Bug 908324

Summary: Turn off rdns by default in krb5
Product: Red Hat Enterprise Linux 7 Reporter: Stef Walter <stefw>
Component: krb5Assignee: Nalin Dahyabhai <nalin>
Status: CLOSED CURRENTRELEASE QA Contact: Patrik Kis <pkis>
Severity: low Docs Contact:
Priority: medium    
Version: 7.0CC: dpal, nalin, nathaniel, pkis, riehecky, ssorce
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: krb5-1.11.3-4.el7 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: 908323
: 1286211 (view as bug list) Environment:
Last Closed: 2014-06-13 10:32:43 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 908323    
Bug Blocks: 1286211    

Description Stef Walter 2013-02-06 12:41:54 UTC 
+++ This bug was initially created as a clone of Bug #908323 +++

krb5 uses reverse DNS records for creating service principals from host names. This is non-standard behavior. Apparently most other clients do not do this, and the RFC 4120 does not specify this behavior.

Being the only client that uses PTR records for this purposes causes problems, as unfortunately realms often have missing or incorrect information present in PTR records.

We should change the builtin default behavior to match other clients. Upstream is considering such a change:

http://mailman.mit.edu/pipermail/kerberos/2011-July/017313.html

Because this represents a change in defaults, we should make this happen in RHEL 7 (rather than a point release) and Fedora 19.

The previous behavior would still be available by changing the krb5.conf.

This is related to: https://fedoraproject.org/wiki/Features/LessBrittleKerberos
Comment 2 Nalin Dahyabhai 2013-10-07 13:32:59 UTC 
We're picking up the change in the default configuration, which based on traffic in bug #908323 looks sufficient.
Comment 6 Ludek Smid 2014-06-13 10:32:43 UTC 
This request was resolved in Red Hat Enterprise Linux 7.0.

Contact your manager or support representative in case you have further questions about the request.