PDA

View Full Version : [Solved] FreeBSD 9, disable ipv6

DD
January 19th, 2012, 11:18
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.
SirDice
January 19th, 2012, 11:27
Not sure if this is correct, the settings changed a lot compared to 8.x and I'm still adjusting myself.

/etc/rc.conf:

ipv6_network_interfaces="none" # Default is auto
ipv6_activate_all_interfaces="NO" # this is the default
DD
January 19th, 2012, 11:31
Not sure if this is correct, the settings changed a lot compared to 8.x and I'm still adjusting myself.

/etc/rc.conf:

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.
DD
January 19th, 2012, 11:57
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.
SirDice
January 19th, 2012, 12:07
Anyway, still don't care for the ipv6 stuff.
You should. It won't be long until all IPv4 addresses are completely depleted.
DD
January 19th, 2012, 12:13
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.
SirDice
January 19th, 2012, 12:21
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 ;)

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/
DD
January 19th, 2012, 12:32
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.

Ah, yes, understandable.

And you know what? I'll stick with the 8.2 for now.
phoenix
January 19th, 2012, 16:36
grep ipv6 /etc/defaults/rc.conf
Read the comments attached to those, and the rc.conf man page for details.
DD
January 19th, 2012, 16:45
grep ipv6 /etc/defaults/rc.conf
Read the comments attached to those, and the rc.conf man page for details.

That's the first thing I did, but I'm sure I missed something.
bbzz
January 19th, 2012, 17:02
Why not just rebuild kernel without IPv6?
phoenix
January 19th, 2012, 17:29
This is how we do it on our 9.0 boxes:

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".
Wout
April 16th, 2012, 14:10
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 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 BUGS section). Even if you do not use IPv6 yet, you will eventually ;)