On 11/28/2012 12:45 PM, Johnny Hughes wrote:
> On 11/28/2012 12:25 PM, Charles Bearden wrote:
>> Hi all,
>>
>> I'm pretty new to CentOS. I am working with a newly set-up server:
>>
>> [cbearden@host ~]$ lsb_release -a
>> LSB Version:
>> :core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch
>> Distributor ID: CentOS
>> Description: CentOS release 6.3 (Final)
>> Release: 6.3
>> Codename: Final
>>
>> I'm trying to solve this problem (X11 forwarding)
>> http://thread.gmane.org/gmane.linux.centos.general/119342/focus=119347
>> for myself.
>>
>> But disabling ipv6 and adding
>>
>> AddressFamily inet
>>
>> to my sshd config didn't fix the problem. Oddly enough, the output of
>>
>> netstat -an
>>
>> suggests that ipv6 is still enabled:
>>
>> tcp 0 0 :::22 :::* LISTEN
>>
>> even though
>>
>> [cbearden@PostgreSQL ~]$ cat /proc/sys/net/ipv6/conf/all/disable_ipv6
>> 1
>>
>> This is after a reboot. Am I right that the /proc file suggests that ipv6 is
>> disabled while netstat suggests that it isn't?
>>
>> Thanks,
>> Chuck
>
> http://wiki.centos.org/FAQ/CentOS6#head-d47139912868bcb9d754441ecb6a8a10d41781df
Thanks to Mark, Barry, and Johnny for their swift responses.
I tried the steps at the wiki page above, but no joy. In particular, when I
restart sshd, it appears that the 'stop' part fails:
# /etc/init.d/sshd restart
Stopping sshd: [FAILED]
Starting sshd: [ OK ]
Despite altering both values via sysctl and adding the AddressFamily line and
uncommenting ListenAddress 0.0.0.0, sshd appears still to be listening on :::22.
Other processes are still listening on ipv6-bound ports as well.
Do I need to explicitly remove the ipv6 kernel module? I probably can't while
some daemons are bound to ::: ports. Sorry if I'm being dense here.
I don't know if this makes any difference, but the CentOS system is running in a
VM. It's not a setup I chose or ultimately control.
Thanks,
Chuck
--
Chuck Bearden
Programmer Analyst IV
The University of Texas Health Science Center at Houston
School of Biomedical Informatics
Email: Charles.F.Bearden@xxxxxxxxxxx
Phone: 713.500.9672
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