[gentoo-user] disabling IPv6 autoconfig for all interfaces

[gentoo-user] disabling IPv6 autoconfig for all interfaces

[J. Roeleveld]

Hi all,

For my VM server, I have several network interfaces and bridges configured.
I don't want every single interface and bridge to have an IPv6 address.

Only the one required for accessing the host will be sufficient.

What is the correct way to disable any form of autoconfiguration? Setting the 
config to "null":

eg:  config_eth0="null" 

only works for IPv4.

A related question: How do I prevent IPv6 addresses other than the ones I DO 
configure?

Many thanks,

Joost

Re: [gentoo-user] disabling IPv6 autoconfig for all interfaces

[Alarig Le Lay]

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On Sat Nov 19 20:09:24 2016, J. Roeleveld wrote:
> Hi all,
> 
> A related question: How do I prevent IPv6 addresses other than the ones I DO 
> configure?
> 
> Many thanks,
> 
> Joost

Hi, 

You can do this with sysctl by setting the option
net.ipv6.conf.$if.accept_ra to 0.

-- 
alarig

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Re: [gentoo-user] disabling IPv6 autoconfig for all interfaces

[J. Roeleveld]

On Saturday, November 19, 2016 09:13:14 PM Alarig Le Lay wrote:
> On Sat Nov 19 20:09:24 2016, J. Roeleveld wrote:
> > Hi all,
> > 
> > A related question: How do I prevent IPv6 addresses other than the ones I
> > DO configure?
> > 
> > Many thanks,
> > 
> > Joost
> 
> Hi,
> 
> You can do this with sysctl by setting the option
> net.ipv6.conf.$if.accept_ra to 0.

doesn't work, I still get these:
inet6 fe80::2e0:81ff:fecc:6ec6  prefixlen 64  scopeid 0x20<link>

The problem with these (the mac-based ones) is that with multiple VLANs, they 
all insist on using the same IP as they are all on the same physical device.

--
Joost

Re: [gentoo-user] disabling IPv6 autoconfig for all interfaces

[Alarig Le Lay]

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On Sat Nov 19 22:33:33 2016, J. Roeleveld wrote:
> doesn't work, I still get these:
> inet6 fe80::2e0:81ff:fecc:6ec6  prefixlen 64  scopeid 0x20<link>
> 
> The problem with these (the mac-based ones) is that with multiple VLANs, they 
> all insist on using the same IP as they are all on the same physical device.

It’s a link-local IPv6, it’s normal to have at least one on each
interface. And you can have the same fe80 on several interfaces.

-- 
alarig

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