Bug 530741

Summary: "GSSAPIAuthentication yes" by default causes connection issues
Product: [Fedora] Fedora Reporter: Justin Newman <eqisow>
Component: opensshAssignee: Jan F. Chadima <jchadima>
Status: CLOSED WONTFIX QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: low    
Version: 11CC: jchadima, mgrepl, tmraz
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2010-06-28 11:07:44 EDT Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Justin Newman 2009-10-24 13:16:51 EDT
Let me just preface this report by saying that I'm not really sure how to make it useful, but I'll include the information I can and hopefully somebody can make something of it.

Description of problem: The default sshd_config has GSSAPIAuthentication set to yes, which seems to cause connection problems ranging from slow authentication to dropped connections.

Version-Release number of selected component (if applicable): OpenSSH_5.2p1, OpenSSL 0.9.8k-fips

How reproducible: It happened on a mostly default sshd setup when connecting from Debian Lenny to Fedora 11. Setting GSSAPIAuthentication to no makes it stop and yes makes it happen again.

Actual results: Authentication is made much slower than usual, and drop connections while authenticating are common (>50% for me)

Expected results: SSH connects and authenticates normally and speedily.

Additional info:

Full IRC conversation, with links to debug output: http://pastebin.mozilla.org/678786
Initial debug output: http://pastebin.mozilla.org/678787
Still works from localhost when set to yes: http://pastebin.mozilla.org/678783
Output with 'GSSAPIAuthentication no': http://pastebin.mozilla.org/678785
Comment 1 Bug Zapper 2010-04-28 06:57:15 EDT
This message is a reminder that Fedora 11 is nearing its end of life.
Approximately 30 (thirty) days from now Fedora will stop maintaining
and issuing updates for Fedora 11.  It is Fedora's policy to close all
bug reports from releases that are no longer maintained.  At that time
this bug will be closed as WONTFIX if it remains open with a Fedora 
'version' of '11'.

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Comment 2 Bug Zapper 2010-06-28 11:07:44 EDT
Fedora 11 changed to end-of-life (EOL) status on 2010-06-25. Fedora 11 is 
no longer maintained, which means that it will not receive any further 
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of 
Fedora please feel free to reopen this bug against that version.

Thank you for reporting this bug and we are sorry it could not be fixed.