Bug 1063278 - sss_ssh_knownhostsproxy doesn't fall back to ipv4
Summary: sss_ssh_knownhostsproxy doesn't fall back to ipv4
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: sssd
Version: 25
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Jakub Hrozek
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2014-02-10 11:56 UTC by Dennis Gilmore
Modified: 2020-05-02 16:58 UTC (History)
11 users (show)

Fixed In Version: sssd-1.15.2-3.fc26 sssd-1.15.2-3.fc25 sssd-1.15.2-3.fc24
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2017-05-04 13:32:02 UTC
Type: Bug
Embargoed:


Attachments (Terms of Use)
proposed fix (1.87 KB, patch)
2016-08-18 18:50 UTC, Nalin Dahyabhai
no flags Details | Diff


Links
System ID Private Priority Status Summary Last Updated
Github SSSD sssd issues 2540 0 None closed sss_ssh_knownhostsproxy prevents connection if the network is unreachable via one IP address 2020-07-17 05:41:29 UTC

Description Dennis Gilmore 2014-02-10 11:56:48 UTC
Description of problem:
When sshing to a box with dual stack networking from a box with a broken network setup, fallback to ipv4 fails to occur. -4 command line option on ssh is also ignored



Version-Release number of selected component (if applicable):
sssd-common-1.11.3-1.fc21.x86_64

How reproducible:
always

Steps to Reproduce:
1. ssh to host with ipv6 from network that cant route to host via ipv6
2.
3.

Actual results:
ssh -4 -vvvvv fedorapeople.org
OpenSSH_6.4, OpenSSL 1.0.1e-fips 11 Feb 2013
debug1: Reading configuration data /home/dennis/.ssh/config
debug1: /home/dennis/.ssh/config line 30: Applying options for fedorapeople.org
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 54: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Executing proxy command: exec /usr/bin/sss_ssh_knownhostsproxy -p 22 fedorapeople.org
debug1: permanently_drop_suid: 217600001
debug3: Incorrect RSA1 identifier
debug3: Could not load "/home/dennis/.ssh/id_rsa" as a RSA1 public key
debug1: identity file /home/dennis/.ssh/id_rsa type 1
debug1: identity file /home/dennis/.ssh/id_rsa-cert type -1
debug1: identity file /home/dennis/.ssh/id_dsa type -1
debug1: identity file /home/dennis/.ssh/id_dsa-cert type -1
debug3: Incorrect RSA1 identifier
debug3: Could not load "/home/dennis/.ssh/id_ecdsa" as a RSA1 public key
debug1: identity file /home/dennis/.ssh/id_ecdsa type 3
debug1: identity file /home/dennis/.ssh/id_ecdsa-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.4
ssh_exchange_identification: Connection closed by remote host

Expected results:
ssh to work 

Additional info:

adding -4 to ssh command line to force ipv4 fails also

Comment 1 Jakub Hrozek 2014-02-10 12:12:44 UTC
Can you include the logs produced by sssd when you put debug_level=7 to the [ssh] and [domain] sections?

Comment 2 Pavel Březina 2014-02-10 12:19:24 UTC
This is probably the same problem as described in deferred ticket: https://fedorahosted.org/sssd/ticket/1498

Comment 3 openshift-github-bot 2014-02-11 18:28:18 UTC
Commit pushed to master at https://github.com/openshift/origin-server

https://github.com/openshift/origin-server/commit/e893f1d1b6a6658275ade55a75a1a330124ee792
Bug 1063278 - kill user processes before user

	modified:   node-util/sbin/oo-admin-gear

Comment 4 Jakub Hrozek 2014-02-12 16:12:59 UTC
Upstream ticket:
https://fedorahosted.org/sssd/ticket/1498

Comment 5 Adam Williamson 2014-10-09 03:43:09 UTC
I just ran into this on F21 today. Rather annoying in the case where IPv6 routing fails but IPv4 works.

Comment 6 Jaroslav Reznik 2015-03-03 15:28:16 UTC
This bug appears to have been reported against 'rawhide' during the Fedora 22 development cycle.
Changing version to '22'.

More information and reason for this action is here:
https://fedoraproject.org/wiki/Fedora_Program_Management/HouseKeeping/Fedora22

Comment 7 Fedora End Of Life 2016-07-19 10:59:10 UTC
Fedora 22 changed to end-of-life (EOL) status on 2016-07-19. Fedora 22 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. If you
are unable to reopen this bug, please file a new report against the
current release. If you experience problems, please add a comment to this
bug.

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

Comment 8 Jan Kurik 2016-07-26 04:24:28 UTC
This bug appears to have been reported against 'rawhide' during the Fedora 25 development cycle.
Changing version to '25'.

Comment 9 Nalin Dahyabhai 2016-08-18 18:50:32 UTC
Created attachment 1191974 [details]
proposed fix

Comment 10 Jakub Hrozek 2016-08-19 12:03:18 UTC
(In reply to Nalin Dahyabhai from comment #9)
> Created attachment 1191974 [details]
> proposed fix

Thank you, I sent the patch to sssd-devel.

Comment 11 Jakub Hrozek 2016-08-19 12:03:49 UTC
Dennis, are you interested in testing the patch?

Comment 12 Dennis Gilmore 2016-08-23 23:06:36 UTC
Jakub, happy to help test the patch

Comment 13 Jakub Hrozek 2016-08-24 08:00:07 UTC
(In reply to Dennis Gilmore from comment #12)
> Jakub, happy to help test the patch

OK, which version should I base the test package on (rpm -q sssd output is sufficient) ?

Comment 14 Dennis Gilmore 2016-08-29 13:06:49 UTC
fedora 24 or fedora 25 builds would be good

Comment 15 Jakub Hrozek 2016-08-29 14:19:16 UTC
OK, I prepared a F-24 repo here (COPR didn't offer me F-25..)

https://copr.fedorainfracloud.org/coprs/jhrozek/sssd-addrfamily-fallback/

Comment 16 Dennis Gilmore 2016-08-30 15:39:52 UTC
in quick testing it works.  fall back is very slow, but it does appear to do so.

Comment 17 Dennis Gilmore 2016-08-31 01:46:35 UTC
actually it seems something is really broken. I have a bunch of ipv6 only hosts ssh to them fails with
packet_write_wait: Connection to UNKNOWN port 65535: Broken pipe

if i ssh to root@host it works okay

Comment 18 Jakub Hrozek 2016-08-31 08:36:14 UTC
(In reply to Dennis Gilmore from comment #17)
> actually it seems something is really broken. I have a bunch of ipv6 only
> hosts ssh to them fails with
> packet_write_wait: Connection to UNKNOWN port 65535: Broken pipe
> 
> if i ssh to root@host it works okay

Does this only happen with the sssd ssh responder? If yes, we should look at the debug logs, Broken Pipe would suggest the connection between sss_ssh and sshd was terminated abruptly for some reason.

Comment 19 Lukas Slebodnik 2017-04-28 17:19:12 UTC
master:
* 244adc327f7e29ba2c7ef60bc9f732d8fe3e68c9
* 5f6232c7e6d9635c1d6b6b09f799309b6094b143
* 08084b1179bb9fc38bc22b464b3d44907107bfd3

Comment 20 Fedora Update System 2017-05-01 08:13:21 UTC
sssd-1.15.2-3.fc26 has been submitted as an update to Fedora 26. https://bodhi.fedoraproject.org/updates/FEDORA-2017-8addfc0188

Comment 21 Fedora Update System 2017-05-01 08:15:20 UTC
sssd-1.15.2-3.fc25 has been submitted as an update to Fedora 25. https://bodhi.fedoraproject.org/updates/FEDORA-2017-ac43ea8522

Comment 22 Fedora Update System 2017-05-01 08:21:26 UTC
sssd-1.15.2-3.fc24 has been submitted as an update to Fedora 24. https://bodhi.fedoraproject.org/updates/FEDORA-2017-2b18f89e47

Comment 23 Fedora Update System 2017-05-02 03:30:41 UTC
sssd-1.15.2-3.fc25 has been pushed to the Fedora 25 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-ac43ea8522

Comment 24 Fedora Update System 2017-05-02 05:04:57 UTC
sssd-1.15.2-3.fc24 has been pushed to the Fedora 24 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-2b18f89e47

Comment 25 Fedora Update System 2017-05-02 06:37:21 UTC
sssd-1.15.2-3.fc26 has been pushed to the Fedora 26 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-8addfc0188

Comment 26 Fedora Update System 2017-05-04 13:32:02 UTC
sssd-1.15.2-3.fc26 has been pushed to the Fedora 26 stable repository. If problems still persist, please make note of it in this bug report.

Comment 27 Fedora Update System 2017-05-12 12:03:58 UTC
sssd-1.15.2-3.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.

Comment 28 Fedora Update System 2017-05-12 19:23:19 UTC
sssd-1.15.2-3.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.


Note You need to log in before you can comment on or make changes to this bug.