See http://wiki.centos.org/FAQ/CentOS5#head … 366b421dc4">http://wiki.centos.org/FAQ/CentOS5#head-47912ebdae3b5ac10ff76053ef057c366b421dc4

Thanks. I was familiar with this in general, however:

> Edit /etc/sysconfig/network and set "NETWORKING_IPV6" to "no"
On my Linode this line wasn't in /etc/sysconfig/network, as it is on other servers.

Should I just create it (set to "no" of course) and then follow the rest of the instructions?

Thanks.

Give it a go, I don't know how centos manages ipv6 see if it works if it doesn't yell and someone with more centos knowledge will probably pop up.

This worked for Debian Lenny. I don't know about Centos.

~~[http://www.cyberciti.biz/tips/linux-how-to-disable-the-ipv6-protocol.html#comment-154806" target="_blank">](http://www.cyberciti.biz/tips/linux-how … ent-154806">http://www.cyberciti.biz/tips/linux-how-to-disable-the-ipv6-protocol.html#comment-154806](

Add these lines to /etc/sysctl.conf

disable ipv6

net.ipv6.conf.all.disable_ipv6=1

and run

sysctl -p /etc/sysctl.conf

On further research I've seen that disabling it might cause issues.

Am I better off leaving it active and just using ip6tables? I'd really prefer not to have something active on my Linode if it isn't being used, but I wonder if this is the best way.

Is there actually an IPV6 address assigned to your Linode?

>> Is there actually an IPV6 address assigned to your Linode?

Not that I know of. I'm still new here so I'm not sure what goes on under the hood. But I just see the IPV4 address.

I've still heard that IPV6 should be deactivated if not in use…I'm no longer sure how true that is.

Thanks.

If it ain't broke don't fix it.

If ipv6 being enabled isn't causing you problems leave it alone.

Since you don't actually have any IPv6 connectivity, the only danger is from localhost. It'd be pretty easy to set up a couple firewall rules to kill all IPv6 traffic other than localhost, not that any exists in the first place.

Thanks to everyone!