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Bug 201594

Summary:	sshd does not create ipv4 listen socket for X11 forwarding
Product:	Red Hat Enterprise Linux 4	Reporter:	Stephen P. Schaefer <sschaefer>
Component:	openssh	Assignee:	Tomas Mraz <tmraz>
Status:	CLOSED ERRATA	QA Contact:	Brian Brock <bbrock>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	4.0	CC:	sschaefer
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	RHSA-2007-0257	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-05-01 17:29:49 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Stephen P. Schaefer 2006-08-07 18:55:56 UTC

Description of problem:
X11 forwarding doesn't function with IPv4 by default

Version-Release number of selected component (if applicable):
openssh-3.9p1-8.RHEL4.12

How reproducible:


Steps to Reproduce:
1. Make entries in /etc/ssh/sshd_config:
X11Forwarding yes
X11UseLocalhost no
2. restart sshd, e.g., sudo /etc/init.d/sshd restart
3. attempt to start an X client
  
Actual results:
Client gets "connection refused".  Netstat -tan shows

tcp        0      0 :::6010                     :::*                        LISTEN


Expected results:
Client get successful connection.  Netstat -tan shows

tcp        0      0 0.0.0.0:6010                0.0.0.0:*                   LISTEN


Additional info:

Successful workaround: in /etc/sysconfig/sshd, put

OPTIONS=-4

Comment 1 Tomas Mraz 2006-08-08 10:30:38 UTC

The problem is not with the :::6010 output but with the fact that sshd sets
incorrectly IPV6_V6ONLY socket option on the socket.

Comment 2 RHEL Program Management 2006-08-31 15:33:01 UTC

This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
release.

Comment 4 Tomas Mraz 2006-10-05 08:51:35 UTC

Fixed in openssh-3.9p1-8.RHEL4.18

Comment 8 Red Hat Bugzilla 2007-05-01 17:29:50 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2007-0257.html