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Old January 19th, 2012, 11:18
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Default FreeBSD 9, disable ipv6
How can I disable ipv6 on FBSD FreeBSD 9?

I don't want the link-local on any interface, besides ntpd seems not able to bind the ipv6 addresses giving me error during startup.
Last edited by DutchDaemon; January 19th, 2012 at 11:42.
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Old January 19th, 2012, 11:27
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Not sure if this is correct, the settings changed a lot compared to 8.x and I'm still adjusting myself.

/etc/rc.conf:
Code:
ipv6_network_interfaces="none"    # Default is auto
ipv6_activate_all_interfaces="NO" # this is the default
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Old January 19th, 2012, 11:31
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Quote:
Originally Posted by SirDice View Post
Not sure if this is correct, the settings changed a lot compared to 8.x and I'm still adjusting myself.

/etc/rc.conf:
Code:
ipv6_network_interfaces="none"    # Default is auto
ipv6_activate_all_interfaces="NO" # this is the default
I've already tried that, it doesn't do the trick.
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Old January 19th, 2012, 11:57
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The NTPd problem doesn't occur on the other server, so my fault I guess. Even though I did the same thing on both. Only difference is the fist is a virtual machine and the second one "physical". Anyway, still don't care for the ipv6 stuff. If someone knows how to disable it it'd be great.
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Old January 19th, 2012, 12:07
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Anyway, still don't care for the ipv6 stuff.
You should. It won't be long until all IPv4 addresses are completely depleted.
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Old January 19th, 2012, 12:13
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Quote:
Originally Posted by SirDice View Post
You should. It won't be long until all IPv4 addresses are completely depleted.
Those servers won't see any public IP, ever.

And to be totally honest I'm not skilled enough on ipv6 - yet - to risk using it in production environment when it's more the superfluous.
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Old January 19th, 2012, 12:21
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And to be totally honest I'm not skilled enough on ipv6 - yet -
Neither was I but it never hurts to be prepared for the future. It'll also give you an edge over your colleagues as they will scramble to get educated when they're forced to migrate and you already know how it works

Quote:
to risk using it in production environment when it's more the superfluous.
Ah, yes, understandable.

Slightly offtopic, the 6th of June will be another IPv6 day. http://www.worldipv6day.org/
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Old January 19th, 2012, 12:32
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Neither was I but it never hurts to be prepared for the future. It'll also give you an edge over your colleagues as they will scramble to get educated when they're forced to migrate and you already know how it works
Sure but I barely have the time to check on the new FreeBSD release, you know. It's merely a question of having the time to do a bit of studying.

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Ah, yes, understandable.
And you know what? I'll stick with the 8.2 for now.
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Old January 19th, 2012, 16:36
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# grep ipv6 /etc/defaults/rc.conf
Read the comments attached to those, and the rc.conf(5) man page for details.
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Old January 19th, 2012, 16:45
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Originally Posted by phoenix View Post
# grep ipv6 /etc/defaults/rc.conf
Read the comments attached to those, and the rc.conf(5) man page for details.
That's the first thing I did, but I'm sure I missed something.
Last edited by phoenix; January 19th, 2012 at 17:23. Reason: fist -> first
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Old January 19th, 2012, 17:02
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Why not just rebuild kernel without IPv6?
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Old January 19th, 2012, 17:29
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This is how we do it on our 9.0 boxes:
Code:
ip6addrctl_enable="NO"                  # New way to disable IPv6 support
ip6addrctl_policy="ipv4_prefer"         # Use IPv4 instead of IPv6
ipv6_activate_all_interfaces="NO"       # Do not automatically add IPv6 addresses
Guess you have to search for "ip6" as well as "ipv6".
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Old April 16th, 2012, 14:10
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Quote:
Originally Posted by DD View Post
I don't want the link-local on any interface, besides ntpd seems not able to bind the ipv6 addresses giving me error during startup.
Setting
Code:
ifconfig_bge0_ipv6="inet6 auto_linklocal"
in rc.conf (change bge0 to your interface) has fixed the ntpd warnings for me (9.0-RELEASE).

I would suggest NOT disabling the link-local IPv6 address when using a kernel with IPv6 support (GENERIC does), because this may result in unexpected behaviors of the kernel (see ifconfig(8) BUGS section). Even if you do not use IPv6 yet, you will eventually
Last edited by DutchDaemon; April 16th, 2012 at 16:01. Reason: Proper formatting: http://forums.freebsd.org/showthread.php?t=8816
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