# Disable IPv6 from a script **URL:** \ **Category:** SLES Networking\ **Created:** [June 6, 2013, 5:32pm UTC](https://forums.suse.com/t/disable-ipv6-from-a-script/24042 "2013-06-06T17:32:40Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![mrmcginnt](https://avatars.discourse-cdn.com/v4/letter/m/6a8cbe/32.png) [@mrmcginnt](https://forums.suse.com/u/mrmcginnt)\ **Post date:** [June 6, 2013, 5:32pm UTC](https://forums.suse.com/t/disable-ipv6-from-a-script/24042/1 "2013-06-06T17:32:40Z")
I need to disable IPv6 on 100 servers, so I was hoping to find a way to do it using a script. I searched the forums and the internet, but only found ways that might work. From what I can determine from using YaST to do it, YaST changes several files so I am looking for more of an authoritative answer. If anyone can help it would save me a lot of time. Thanks, Tim ---
**Author:** ![ab1](https://avatars.discourse-cdn.com/v4/letter/a/d2c977/32.png) [@ab1](https://forums.suse.com/u/ab1)\ **Post date:** [June 6, 2013, 7:01pm UTC](https://forums.suse.com/t/disable-ipv6-from-a-script/24042/2 "2013-06-06T19:01:11Z")
I’d start with the Yast changes. If you do not make those then the next time somebody goes to do anything networking-related (change hostname, DNS, server, IP, add other NICs, etc.) it is likely, depending on the setting, that things will be re-enabled. If you find how Yast does it (which ‘sysconfig’ files in particular) then scripting those changes and forcing a reboot (required) should be pretty simple. Good luck. ---
**Author:** ![Willem1](https://avatars.discourse-cdn.com/v4/letter/w/c57346/32.png) [@Willem1](https://forums.suse.com/u/Willem1)\ **Post date:** [June 7, 2013, 12:05am UTC](https://forums.suse.com/t/disable-ipv6-from-a-script/24042/3 "2013-06-07T00:05:06Z")
[QUOTE=mrmcginnt;13910]I need to disable IPv6 on 100 servers, so I was hoping to find a way to do it using a script. I searched the forums and the internet, but only found ways that might work. From what I can determine from using YaST to do it, YaST changes several files so I am looking for more of an authoritative answer. If anyone can help it would save me a lot of time. Thanks, Tim[/QUOTE] Along with Aaron’s reply, this might be an interesting approach: [http://const-cast.blogspot.nl/2009/11/disable-ipv6-using-sysctl-on-linux.html](http://const-cast.blogspot.nl/2009/11/disable-ipv6-using-sysctl-on-linux.html) Which comes down to adding the following to /etc/sysctl.conf: net.ipv6.conf.all.disable\_ipv6 = 1 net.ipv6.conf.default.disable\_ipv6 = 1 net.ipv6.conf.lo.disable\_ipv6 = 1 Cheers, Willem ---
**Author:** ![smflood](https://sea2.discourse-cdn.com/flex022/user_avatar/forums.suse.com/smflood/32/10576_2.png) [@smflood](https://forums.suse.com/u/smflood)\ **Post date:** [June 7, 2013, 12:40pm UTC](https://forums.suse.com/t/disable-ipv6-from-a-script/24042/4 "2013-06-07T12:40:24Z")
On 06/06/2013 22:14, Magic31 wrote: [color=blue] > Along with Aaron’s reply, this might be an interesting approach: > [http://const-cast.blogspot.nl/2009/11/disable-ipv6-using-sysctl-on-linux.html](http://const-cast.blogspot.nl/2009/11/disable-ipv6-using-sysctl-on-linux.html) > > Which comes down to adding the following to /etc/sysctl.conf: > > net.ipv6.conf.all.disable\_ipv6 = 1 > net.ipv6.conf.default.disable\_ipv6 = 1 > net.ipv6.conf.lo.disable\_ipv6 = 1[/color] An alternative is to add the following line to /etc/modprobe.conf.local alias net-pf-10 off net-pf-10 is networking protocol family 10 which is IPv6 - see “modprobe -c | grep net-pf”. The server(s) will then need restarting (just as disabling IPv6 during install also requires a restart). ## HTH. Simon SUSE Knowledge Partner * * * ## Do you work with SUSE technologies at a university, college or school? If so, your campus could benefit from joining the Technology Transfer Partner (TTP) program. See [novell.com/ttp](http://novell.com/ttp) for more details. ---
**Author:** ![jkinning](https://avatars.discourse-cdn.com/v4/letter/j/34f0e0/32.png) [@jkinning](https://forums.suse.com/u/jkinning)\ **Post date:** [May 6, 2014, 8:50pm UTC](https://forums.suse.com/t/disable-ipv6-from-a-script/24042/5 "2014-05-06T20:50:03Z")
So, I tried the following Added the following to /etc/sysctl.conf: net.ipv6.conf.all.disable\_ipv6 = 1 net.ipv6.conf.default.disable\_ipv6 = 1 net.ipv6.conf.lo.disable\_ipv6 = 1 This does appear to disable IPv6 when looking at the ifconfig output. However, if I look at the Networking in Yast the Enable IPv6 is still marked as enabled. Is there something else that needs to happen to remove this in Yast? I am running SLES 11sp3 and like the original poster have several servers which I need to disable this on. Just want to do it right the first time and the correct way. ---
**Author:** ![smflood](https://sea2.discourse-cdn.com/flex022/user_avatar/forums.suse.com/smflood/32/10576_2.png) [@smflood](https://forums.suse.com/u/smflood)\ **Post date:** [May 13, 2014, 2:45pm UTC](https://forums.suse.com/t/disable-ipv6-from-a-script/24042/6 "2014-05-13T14:45:58Z")
On 06/05/2014 18:54, jkinning wrote: [color=blue] > So, I tried the following > Added the following to /etc/sysctl.conf: > net.ipv6.conf.all.disable\_ipv6 = 1 > net.ipv6.conf.default.disable\_ipv6 = 1 > net.ipv6.conf.lo.disable\_ipv6 = 1 > > This does appear to disable IPv6 when looking at the ifconfig output. > However, if I look at the Networking in Yast the Enable IPv6 is still > marked as enabled. Is there something else that needs to happen to > remove this in Yast? I am running SLES 11sp3 and like the original > poster have several servers which I need to disable this on. Just want > to do it right the first time and the correct way.[/color] Unfortunately YaST not correctly reflecting IPv6 being disabled is a cosmetic defect - please see TID 7015035[1] which was recently published. HTH. ## [1] [https://www.suse.com/support/kb/doc.php?id=7015035](https://www.suse.com/support/kb/doc.php?id=7015035) Simon SUSE Knowledge Partner * * * ## If you find this post helpful and are logged into the web interface, please show your appreciation and click on the star below. Thanks.