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 at gmail.com> 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 at gmail.com> wrote: > >> On Fri, Mar 6, 2015 at 11:52 AM, Robert Moskowitz <rgm at htt-consult.com> >> 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 >> _______________________________________________ >> CentOS mailing list >> CentOS at centos.org >> http://lists.centos.org/mailman/listinfo/centos >> > > > > -- > Chris Stone > AxisInternet, Inc. > www.axint.net >-- Chris Stone AxisInternet, Inc. www.axint.net
+1 IPv6 = solution looking for a problem. Disabled on all our systems! -----Original Message----- From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On Behalf Of Chris Stone Sent: Monday, March 09, 2015 01:15 AM To: CentOS mailing list Subject: Re: [CentOS] Centos 6 - disabling IPv6 addressing 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 at gmail.com> 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 at gmail.com> wrote: > >> On Fri, Mar 6, 2015 at 11:52 AM, Robert Moskowitz >> <rgm at htt-consult.com> >> 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 >> _______________________________________________ >> CentOS mailing list >> CentOS at centos.org >> http://lists.centos.org/mailman/listinfo/centos >> > > > > -- > Chris Stone > AxisInternet, Inc. > www.axint.net >-- Chris Stone AxisInternet, Inc. www.axint.net _______________________________________________ CentOS mailing list CentOS at centos.org http://lists.centos.org/mailman/listinfo/centos
I have to disagree on that. NATs is the problem and I am one of the causes of that problem as one of the principals behind RFC 1918. What has happened is that HTTP has become the transport for the Internet. Very bad in a number of ways. But for another time. Perhaps. Right now I have to deal with a new ISP that was on the road to static IPv6 when somehow the lead engineer kind of stopped responding to emails and I won't find out the details until IETF later this month. On 03/09/2015 04:58 AM, Joseph L. Brunner wrote:> +1 > > IPv6 = solution looking for a problem. > > Disabled on all our systems! > > -----Original Message----- > From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On Behalf Of Chris Stone > Sent: Monday, March 09, 2015 01:15 AM > To: CentOS mailing list > Subject: Re: [CentOS] Centos 6 - disabling IPv6 addressing > > 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 at gmail.com> 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 at gmail.com> wrote: >> >>> On Fri, Mar 6, 2015 at 11:52 AM, Robert Moskowitz >>> <rgm at htt-consult.com> >>> 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 >>> _______________________________________________ >>> CentOS mailing list >>> CentOS at centos.org >>> http://lists.centos.org/mailman/listinfo/centos >>> >> >> >> -- >> Chris Stone >> AxisInternet, Inc. >> www.axint.net >> > > > -- > Chris Stone > AxisInternet, Inc. > www.axint.net > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > >
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 at gmail.com> 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 at gmail.com> wrote: >> >>> On Fri, Mar 6, 2015 at 11:52 AM, Robert Moskowitz <rgm at htt-consult.com> >>> 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 >>> _______________________________________________ >>> CentOS mailing list >>> CentOS at centos.org >>> http://lists.centos.org/mailman/listinfo/centos >>> >> >> >> -- >> Chris Stone >> AxisInternet, Inc. >> www.axint.net >> > >
How about, in your /etc/sysconfig/network file adding or editing the line for IPV6 to be: NETWORKING_IPV6=no and then try a 'service network restart' and see what you get. Chris On Mon, Mar 9, 2015 at 11:52 AM, Robert Moskowitz <rgm at htt-consult.com> wrote:> 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 at gmail.com> 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 at gmail.com> >>> wrote: >>> >>> On Fri, Mar 6, 2015 at 11:52 AM, Robert Moskowitz <rgm at htt-consult.com> >>>> 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 >>>> _______________________________________________ >>>> CentOS mailing list >>>> CentOS at centos.org >>>> http://lists.centos.org/mailman/listinfo/centos >>>> >>>> >>> >>> -- >>> Chris Stone >>> AxisInternet, Inc. >>> www.axint.net >>> >>> >> >> > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >-- Chris Stone AxisInternet, Inc. www.axint.net
> On 03/09/2015 01:15 AM, Chris Stone wrote: >> >> sysctl -w net.ipv6.conf.all.accept_ra=0On 03/10/2015 06:52 AM, Robert Moskowitz wrote:> No change after running this and trying both: > > system network restartit's: service network restart Try also setting these in sysctl: net.ipv6.conf.all.disable_ipv6=1 net.ipv6.conf.default.disable_ipv6=1 net.ipv6.conf.eth0.disable_ipv6=1 and then run: service network restart Peter
On 03/09/2015 12:52 PM, Robert Moskowitz wrote:> 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 ;) >Hmm, I've used the information in this link in the past with good results:> http://wiki.centos.org/FAQ/CentOS6#head-d47139912868bcb9d754441ecb6a8a10d41781dfDon't know how this would with with Redsleeve, but with both CentOS 6 and RHEL 6 it works fine. I was able to disable IPv6 on-the-fly without a reboot using the "sysctl -w" method. Your Mileage May Vary! -- Jay Leafey - jay.leafey at mindless.com Memphis, TN