Re: Centos 6 - disabling IPv6 addressing

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No change after running this and trying both:

system network restart

ifdown eth0; ifup eth0

Still having an IPv6 addr.

The box has been up for 140 days.  Would like to keep it running...

This box is really Redsleeve 6, which is the port of Centos 6 to arm. The kernel I am using is the F19 kernel. All of this MIGHT be contributing to things not working as they would on a 'normal' Centos box. I am awaiting the start of the Centos7-arm work ;)

On 03/09/2015 01:15 AM, Chris Stone wrote:
Sorry - that should be


sysctl -w net.ipv6.conf.all.accept_ra=0

to disable that, not 1.


Chris


On Sun, Mar 8, 2015 at 11:14 PM, Chris Stone <axisml@xxxxxxxxx> wrote:

Try:

sysctl -w net.ipv6.conf.all.accept_ra=1

to persist between boots, be sure to add this to your /etc/sysctl.conf
file.

This should prevent the box from listening to any RA announcements.


Chris

On Sun, Mar 8, 2015 at 10:55 PM, Ryan Wagoner <rswagoner@xxxxxxxxx> wrote:

On Fri, Mar 6, 2015 at 11:52 AM, Robert Moskowitz <rgm@xxxxxxxxxxxxxxx>
wrote:


On 03/06/2015 11:00 AM, Robert Moskowitz wrote:


On 03/06/2015 10:55 AM, Barry Brimer wrote:


  IPV6INIT="no"
But I am still getting a global IPv6 (and of course local scope).

What else do I need to do to disable the listening for RA
announcements
and setting an IPv6 global address?  I do not want to reboot the box.

There are other modules, most notably bonding that rely on the ipv6
module being loaded. What I do is place "options ipv6 disable=1" in
"/etc/modprobe.d/ipv6.conf". That does require a reboot, which I know
you
are looking to avoid, so you may want to try other methods to remove
your
address in the running configuration.

'All' I need is for the system not to have a global IPv6 address. Then
it
will not try to connect to other global IPv6 systems which will reject
the
connection, as the IPv6 rDNS cannot be set, given it is a dynamic IPv6
assigned address from the ISP.

I tried:

# cat /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=z9m9z.htt-consult.com
NETWORKING_IPV6=no
IPV6INIT=no


and 'service network restart' but still showing IPv6 addressing.


I would try adding the below line to /etc/sysconfig/network.

IPV6_AUTOCONF=no

Ryan
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--
Chris Stone
AxisInternet, Inc.
www.axint.net




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