Bug 623068 - Failed to init credentials: KDC has no support for encryption type
Summary: Failed to init credentials: KDC has no support for encryption type
Alias: None
Product: Fedora
Classification: Fedora
Component: krb5
Version: 13
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Nalin Dahyabhai
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2010-08-11 08:59 UTC by Marcus Moeller
Modified: 2011-06-28 14:44 UTC (History)
1 user (show)

Clone Of:
Last Closed: 2011-06-28 14:44:10 UTC

Attachments (Terms of Use)

Description Marcus Moeller 2010-08-11 08:59:55 UTC
Description of problem:

We got a mixed network of Windows 2003 and 2008R2 KDCs.

kinit successfully retreives a ticket if service discovery leads to one of the 2008R2 KDCs, if it leads to a 2003 Server, I got an error message like: 

KDC has no support for encryption type

If session key enctypes are forced using:

        default_tkt_enctypes = arcfour-hmac-md5
        default_tgs_enctypes = arcfour-hmac-md5

everything works fine but shouldn't auto-negotiation work as well?

Comment 1 Marcus Moeller 2010-08-11 09:02:01 UTC
Additional note:

This problem ONLY occurs if dns_lookup_kdc = true and no KDCs are set.

If one of the 2003 Servers is defined manually and dns lookup is off, ticket is retreived correctly.

Comment 2 Marcus Moeller 2010-08-11 09:02:57 UTC
Sorry, I was wrong, problem even exists if KDC is specified manually.

Comment 3 Marcus Moeller 2010-08-11 09:09:52 UTC
After re-verification it really turned out that it only occurs on service discovery.

        default_tkt_enctypes = aes-256-cts arcfour-hmac-md5
        default_tgs_enctypes = aes-256-cts arcfour-hmac-md5

works as well. So I wonder why default enctypes needs to be set if dns lookup is enabled?

Comment 4 Bug Zapper 2011-06-01 11:41:33 UTC
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Comment 5 Bug Zapper 2011-06-28 14:44:10 UTC
Fedora 13 changed to end-of-life (EOL) status on 2011-06-25. Fedora 13 is 
no longer maintained, which means that it will not receive any further 
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