ipv6 stop in slackware 14.0

hyperborea · 11-09-2013, 06:53 AM

Hello , sorry for my stupid question, but I am so desperate. Please, help me to stop ipv6 on my network interfaces. I successfully stoped ipv6 on slackware 12.1 with this command: "echo blacklist ipv6 >> /etc/modprobe.d/blacklist" and reboot the mashine. I have second server with Slackware 14.0 and this method does not work. I does not found blacklist file and I created him with commands "touch /etc/modprobe.d/blacklist" and "touch /lib/modprobe.d/blacklist". In this two files I added "blacklist ipv6" .

How can I stop ipv6 only on eth1 and ipv6 still work on eth0?

Thanks in advance !

allend · 11-09-2013, 10:08 AM

There was change between Slackware 12.1 and Slackware 14.0 where files in /etc/modprobe.d/ needed to have a .conf suffix to be acted upon.
The options for handling ipv6 are shown in /usr/src/linux/Documentation/networking/ipv6.txt

Quote:

Options for the ipv6 module are supplied as parameters at load time.

Module options may be given as command line arguments to the insmod
or modprobe command, but are usually specified in either
/etc/modules.d/*.conf configuration files, or in a distro-specific
configuration file.

The available ipv6 module parameters are listed below. If a parameter
is not specified the default value is used.

The parameters are as follows:

disable

Specifies whether to load the IPv6 module, but disable all
its functionality. This might be used when another module
has a dependency on the IPv6 module being loaded, but no
IPv6 addresses or operations are desired.

The possible values and their effects are:

0
IPv6 is enabled.

This is the default value.

1
IPv6 is disabled.

No IPv6 addresses will be added to interfaces, and
it will not be possible to open an IPv6 socket.

A reboot is required to enable IPv6.

autoconf

Specifies whether to enable IPv6 address autoconfiguration
on all interfaces. This might be used when one does not wish
for addresses to be automatically generated from prefixes
received in Router Advertisements.

The possible values and their effects are:

0
IPv6 address autoconfiguration is disabled on all interfaces.

Only the IPv6 loopback address (::1) and link-local addresses
will be added to interfaces.

1
IPv6 address autoconfiguration is enabled on all interfaces.

This is the default value.

disable_ipv6

Specifies whether to disable IPv6 on all interfaces.
This might be used when no IPv6 addresses are desired.

The possible values and their effects are:

0
IPv6 is enabled on all interfaces.

This is the default value.

1
IPv6 is disabled on all interfaces.

No IPv6 addresses will be added to interfaces.

So, as to this

Quote:

How can I stop ipv6 only on eth1 and ipv6 still work on eth0?

I do not think you can do it.

Stuferus · 11-09-2013, 12:05 PM

why do you want to stop it? you know its not a good idea as ipv4 has reachd end of life.. there are no more ipv4 addresses free by ripe and others.

its recommended to switch/use ipv6 since the last ipv6 day.

so whats the problem with it? thanks.

hyperborea · 11-09-2013, 01:48 PM

Thanks for respondings
I didn't understant How to stop ipv6 load like modules in Slackware 14.0.

In my country ISP don't offer IPv6.

Stuferus · 11-09-2013, 05:28 PM

Quote:

Originally Posted by hyperborea

In my country ISP don't offer IPv6.

thats no reason to disable it.

allend · 11-09-2013, 05:51 PM

To stop the ipv6 module loading, try changing the blacklist file name to include a .conf suffix.

Code:

mv /etc/modprobe.d/blacklist /etc/modprobe.d/blacklist.conf

This is not the recommended procedure though, as without the kernel module present, there may be problems with other software that expects it.

Rather than using a configuration file in /etc/modprobe.d, you can also use a kernel parameter passed at boot time. You could allow the module to load, but disable the functionality by adding ' disable_ipv6=1' to the append line in lilo.conf, rerunning lilo and then rebooting.