Public bug reported: (The following seems to impact Raring, which I believe is a regression from Precise where the following setup did successfully disable ipv6).
I have attempted to disable ipv6 by adding a bunch of configuration flags to the bottom of /etc/sysctl.conf: # tail -n 4 /etc/sysctl.conf net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 net.ipv6.conf.lo.disable_ipv6 = 1 net.ipv6.conf.eth0.disable_ipv6 = 1 However from a fresh reboot ipv6 is *enabled* on eth0. Perhaps this is because it is trying to be set before that interface has come up. But then shouldn't the all interface cover it? We can see the values currently set: # for i in /proc/sys/net/ipv6/conf/*/disable_ipv6; do echo -n "$i: " ; cat $i; done /proc/sys/net/ipv6/conf/all/disable_ipv6: 1 /proc/sys/net/ipv6/conf/default/disable_ipv6: 1 /proc/sys/net/ipv6/conf/eth0/disable_ipv6: 0 /proc/sys/net/ipv6/conf/lo/disable_ipv6: 1 Starting up procps again does set the configuration to what I would have expected: # service procps start procps stop/waiting # for i in /proc/sys/net/ipv6/conf/*/disable_ipv6; do echo -n "$i: " ; cat $i; done /proc/sys/net/ipv6/conf/all/disable_ipv6: 1 /proc/sys/net/ipv6/conf/default/disable_ipv6: 1 /proc/sys/net/ipv6/conf/eth0/disable_ipv6: 1 /proc/sys/net/ipv6/conf/lo/disable_ipv6: 1 How can I disable ipv6 at bootup time? ---- # uname -a Linux salinas 3.8.0-19-generic #29-Ubuntu SMP Wed Apr 17 18:16:28 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux # lsb_release -rd Description: Ubuntu 13.04 Release: 13.04 # apt-cache policy procps procps: Installed: 1:3.3.3-2ubuntu5 Candidate: 1:3.3.3-2ubuntu5 Version table: *** 1:3.3.3-2ubuntu5 0 500 http://mirror.anl.gov/pub/ubuntu/ raring/main amd64 Packages 100 /var/lib/dpkg/status ** Affects: procps (Ubuntu) Importance: Undecided Status: New ** Description changed: + (The following seems to impact Raring, which I believe is a regression + from Precise where the following setup did successfully disable ipv6). + I have attempted to disable ipv6 by adding a bunch of configuration flags to the bottom of /etc/sysctl.conf: - # tail -n 4 /etc/sysctl.conf - net.ipv6.conf.all.disable_ipv6 = 1 - net.ipv6.conf.default.disable_ipv6 = 1 - net.ipv6.conf.lo.disable_ipv6 = 1 - net.ipv6.conf.eth0.disable_ipv6 = 1 + # tail -n 4 /etc/sysctl.conf + net.ipv6.conf.all.disable_ipv6 = 1 + net.ipv6.conf.default.disable_ipv6 = 1 + net.ipv6.conf.lo.disable_ipv6 = 1 + net.ipv6.conf.eth0.disable_ipv6 = 1 + However from a fresh reboot ipv6 is *enabled* on eth0. Perhaps this is + because it is trying to be set before that interface has come up. But + then shouldn't the all interface cover it? We can see the values + currently set: - However from a fresh reboot ipv6 is *enabled* on eth0. Perhaps this is because it is trying to be set before that interface has come up. But then shouldn't the all interface cover it? We can see the values currently set: + # for i in /proc/sys/net/ipv6/conf/*/disable_ipv6; do echo -n "$i: " ; cat $i; done + /proc/sys/net/ipv6/conf/all/disable_ipv6: 1 + /proc/sys/net/ipv6/conf/default/disable_ipv6: 1 + /proc/sys/net/ipv6/conf/eth0/disable_ipv6: 0 + /proc/sys/net/ipv6/conf/lo/disable_ipv6: 1 - # for i in /proc/sys/net/ipv6/conf/*/disable_ipv6; do echo -n "$i: " ; cat $i; done - /proc/sys/net/ipv6/conf/all/disable_ipv6: 1 - /proc/sys/net/ipv6/conf/default/disable_ipv6: 1 - /proc/sys/net/ipv6/conf/eth0/disable_ipv6: 0 - /proc/sys/net/ipv6/conf/lo/disable_ipv6: 1 + Starting up procps again does set the configuration to what I would have + expected: - - Starting up procps again does set the configuration to what I would have expected: - - # service procps start - procps stop/waiting - # for i in /proc/sys/net/ipv6/conf/*/disable_ipv6; do echo -n "$i: " ; cat $i; done - /proc/sys/net/ipv6/conf/all/disable_ipv6: 1 - /proc/sys/net/ipv6/conf/default/disable_ipv6: 1 - /proc/sys/net/ipv6/conf/eth0/disable_ipv6: 1 - /proc/sys/net/ipv6/conf/lo/disable_ipv6: 1 - + # service procps start + procps stop/waiting + # for i in /proc/sys/net/ipv6/conf/*/disable_ipv6; do echo -n "$i: " ; cat $i; done + /proc/sys/net/ipv6/conf/all/disable_ipv6: 1 + /proc/sys/net/ipv6/conf/default/disable_ipv6: 1 + /proc/sys/net/ipv6/conf/eth0/disable_ipv6: 1 + /proc/sys/net/ipv6/conf/lo/disable_ipv6: 1 How can I disable ipv6 at bootup time? ---- # uname -a Linux salinas 3.8.0-19-generic #29-Ubuntu SMP Wed Apr 17 18:16:28 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux # lsb_release -rd Description: Ubuntu 13.04 Release: 13.04 # apt-cache policy procps procps: - Installed: 1:3.3.3-2ubuntu5 - Candidate: 1:3.3.3-2ubuntu5 - Version table: - *** 1:3.3.3-2ubuntu5 0 - 500 http://mirror.anl.gov/pub/ubuntu/ raring/main amd64 Packages - 100 /var/lib/dpkg/status + Installed: 1:3.3.3-2ubuntu5 + Candidate: 1:3.3.3-2ubuntu5 + Version table: + *** 1:3.3.3-2ubuntu5 0 + 500 http://mirror.anl.gov/pub/ubuntu/ raring/main amd64 Packages + 100 /var/lib/dpkg/status -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1171914 Title: disable_ipv6 value in /etc/sysctl.conf not set at boot time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/procps/+bug/1171914/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
