Re: Turning off ipv6

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On 02/08/2010 10:16 AM, Tom H wrote:
>> There's lots of variegated advice around on turning off ipv6, much of it
>> out of date. What's the canonical way of doing this in Fedora (12), or
>> at least getting named to shut up about it?
>>      
> ipv6 is now compiled into the kernel so all the previous advice about
> modprobe.conf, modprobe.d, and sysctl.conf no longer works.
>
> You now have to
> (1) add
> ipv6.disable=1
> to the kernel (grub1) or linux (grub2) line
> or
> (2) recompile the kernel without ipv6 or with ipv6 as a module
>    
I created /etc/modprob.d/blacklist-ckj.conf  (ckj being my initials) 
containing:
# Blacklist additions by ckj
# block ipv6 being loaded
blacklist ipv6

That worked for me with kernel 2.6.31.9-174.fc12.i686.PAE without the 
kernel argument in grub, so I don't believe ipv6 is compiled into the 
kernel.  I've not tested the kernel argument, but that may be preferable.

In addition there is an '-4' argument for named to preclude its use of 
IPv6.  You can edit /etc/sysconfig/named to add that argument:
OPTIONS=-4


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