On 07/15/2013 02:44 PM, Michal Schmidt wrote:
On 07/13/2013 01:44 AM, Reindl Harald wrote:
please take a look at this
https://bugzilla.redhat.com/show_bug.cgi?id=982740#c12
what do we do in the future to disable ipv6 entirely
and why is "ipv6.disable=1" as kernel param at least
with 3.10.0-1.fc20.x86_64 on F19?
Back in 2011 the preferred kernel parameter to do that was
"ipv6.disable_ipv6=1":
https://lists.fedoraproject.org/pipermail/kernel/2011-June/003106.html
I assume it's still true today.
"ipv6.disable=1" should still work though. I still see it handled
net/ipv6/af_inet6.c.
In the linked Bugzilla comment you mentioned "ipv6disable=1" (without
a dot). Did this ever work? I think it's a typo.
Adding |ipv6.disable=1| to the kernel commandline disables the whole
IPv6 stack
||
Adding |ipv6.disable_ipv6=1| will keep the IPv6 stack functional but
will not assign IPv6 addresses to any of your network devices.
Creating and adding to for example /etc/sysctl.d/ipv6.conf will avoid
assigning IPv6 addresses to spesific network interface
# Disable IPv6
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.<interface0>.disable_ipv6 = 1
However disabling IPv6 functionality in the kernel will not necessary
prevent other programs from trying to use IPv6 like for example dhcpd
which requires to add "noipv6rs" to /etc/dhcpd.conf so one needs to
consult the man pages for relevant program on how to disable it.
JBG
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