I have just moved a host from a network that supports static IPv4 and IPv6. The IPv4 addr is set in ifcfg-eth0, and the IPv6 via RA (I set the MAC so I get an IPv6 addr that I like).
I just moved the host to a network that supports static IPv4, but only dymanic IPv6, so at this time (until I get static IPv6), I need to disable the global IPv6 addressing. So in the ifcfg-eth0 file I set:
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. I can restart the network as needed.
I seem to recall, once upon atime an option in /etc/sysconfig/network
thanks
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.
Barry
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.
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.
On Fri, Mar 6, 2015 at 11:52 AM, Robert Moskowitz rgm@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
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@gmail.com wrote:
On Fri, Mar 6, 2015 at 11:52 AM, Robert Moskowitz rgm@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@centos.org http://lists.centos.org/mailman/listinfo/centos
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@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@gmail.com wrote:
On Fri, Mar 6, 2015 at 11:52 AM, Robert Moskowitz rgm@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@centos.org http://lists.centos.org/mailman/listinfo/centos
-- Chris Stone AxisInternet, Inc. www.axint.net
+1
IPv6 = solution looking for a problem.
Disabled on all our systems!
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@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@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@gmail.com wrote:
On Fri, Mar 6, 2015 at 11:52 AM, Robert Moskowitz rgm@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@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@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@centos.org [mailto:centos-bounces@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@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@gmail.com wrote:
On Fri, Mar 6, 2015 at 11:52 AM, Robert Moskowitz rgm@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@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@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
On Mon, Mar 9, 2015 at 12:39 PM, Robert Moskowitz rgm@htt-consult.com wrote:
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.
On the contrary. NAT and HTTP are the reasons most households are connected. But now we have http 2.0 to provide some pretense of security.
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@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@gmail.com wrote:
On Fri, Mar 6, 2015 at 11:52 AM, Robert Moskowitz rgm@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@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@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@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@gmail.com wrote:
On Fri, Mar 6, 2015 at 11:52 AM, Robert Moskowitz rgm@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@centos.org http://lists.centos.org/mailman/listinfo/centos
-- Chris Stone AxisInternet, Inc. www.axint.net
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
On 03/09/2015 02:18 PM, Chris Stone wrote:
How about, in your /etc/sysconfig/network file adding or editing the line for IPV6 to be:
NETWORKING_IPV6=no
One of the first things I tried. It is still in there and doing no difference.
What I have is:
# cat network NETWORKING=yes HOSTNAME=z9m9z.htt-consult.com NETWORKING_IPV6=no IPV6INIT=no IPV6_AUTOCONF=no
and:
cat network-scripts/ifcfg-eth0 DEVICE="eth0" BOOTPROTO=none ONBOOT="yes" TYPE="Ethernet" NAME="System eth0" MACADDR=02:67:15:00:00:03 MTU=1500 DNS1=50.253.254.2 DNS2=192.168.224.2 GATEWAY="50.253.254.14" IPADDR="50.253.254.3" NETMASK="255.255.255.240" HOSTNAME="z9m9z.htt-consult.com" IPV6INIT="no"
I have used all the magic glue to say "no ipv6" and it just chugs along.
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@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@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@gmail.com wrote:
On Fri, Mar 6, 2015 at 11:52 AM, Robert Moskowitz rgm@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@centos.org http://lists.centos.org/mailman/listinfo/centos
-- Chris Stone AxisInternet, Inc. www.axint.net
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
On 03/09/2015 01:15 AM, Chris Stone wrote:
sysctl -w net.ipv6.conf.all.accept_ra=0
On 03/10/2015 06:52 AM, Robert Moskowitz wrote:
No change after running this and trying both:
system network restart
it'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 03:24 PM, Peter wrote:
On 03/09/2015 01:15 AM, Chris Stone wrote:
sysctl -w net.ipv6.conf.all.accept_ra=0
On 03/10/2015 06:52 AM, Robert Moskowitz wrote:
No change after running this and trying both:
system network restart
it's: service network restart
Typo. My dsyelxia at work again.
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
error: "net.ipv6.conf.eth0.disable_ipv6" is an unknown key
and then run: service network restart
And no more IPv6. Now to document this so I can reverse it when the time comes!
thanks
Peter _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
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-d47139912868bcb9d754441ecb6a8a10d417...
Don'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!
On 03/09/2015 12:55 AM, Ryan Wagoner wrote:
On Fri, Mar 6, 2015 at 11:52 AM, Robert Moskowitz rgm@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
Added this, did a 'service network restart' and still seeing the IPv6 addr.
On 03/06/2015 10:40 AM, Robert Moskowitz wrote:
I have just moved a host from a network that supports static IPv4 and IPv6. The IPv4 addr is set in ifcfg-eth0, and the IPv6 via RA (I set the MAC so I get an IPv6 addr that I like).
I just moved the host to a network that supports static IPv4, but only dymanic IPv6, so at this time (until I get static IPv6), I need to disable the global IPv6 addressing. So in the ifcfg-eth0 file I set:
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. I can restart the network as needed.
I seem to recall, once upon atime an option in /etc/sysconfig/network
thanks
AFAIK/recall none of the ipv6 disabling in the /etc/sysconfig files has ever quite worked the way it was advertised, I ended up writing a small shell script to be executed on startup to handle the issue. something like: echo "disable ipv6 on physical interfaces" for i in /proc/sys/net/ipv6/conf/eth* do echo 1 > $i/disable_ipv6 done
but you may have better luck.
On 03/06/2015 10:59 AM, zep wrote:
On 03/06/2015 10:40 AM, Robert Moskowitz wrote:
I have just moved a host from a network that supports static IPv4 and IPv6. The IPv4 addr is set in ifcfg-eth0, and the IPv6 via RA (I set the MAC so I get an IPv6 addr that I like).
I just moved the host to a network that supports static IPv4, but only dymanic IPv6, so at this time (until I get static IPv6), I need to disable the global IPv6 addressing. So in the ifcfg-eth0 file I set:
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. I can restart the network as needed.
I seem to recall, once upon atime an option in /etc/sysconfig/network
thanks
AFAIK/recall none of the ipv6 disabling in the /etc/sysconfig files has ever quite worked the way it was advertised, I ended up writing a small shell script to be executed on startup to handle the issue. something like: echo "disable ipv6 on physical interfaces" for i in /proc/sys/net/ipv6/conf/eth* do echo 1 > $i/disable_ipv6 done
but you may have better luck.
I ended up simply disabling IPv6 for postfix. If it does not send with IPv6, no MTAs will fail to accept an IPv6 connection with no DNS or rDNS for that address. And really it SHOULD be that only postfix would be starting an outbound connection. Well there is spamassasin and clamav, but I don't believe they verify the source IP address asking for updates.
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zep