Open your /etc/modprobe.conf file and append:
# Turn off IPv6 alias net-pf-10 off alias ipv6 off
Then restart your server.
How to disable IPv6 in RHEL, Fedora, CentOS
November 21st, 2008 | Linux
linux + ruby on rails = love
November 21st, 2008 | Linux
Open your /etc/modprobe.conf file and append:
# Turn off IPv6 alias net-pf-10 off alias ipv6 off
Then restart your server.
10 comments ↓
Why would you want to disable IPv6 on your machine?
When you are not using IPv6 yet, then it’s a good reason to disable it.
Why? It shouldn’t hurt anything to leave it enabled. And we’ll need to migrate to IPv6 soon. The more people turn it off on devices, the harder it will be to get it deployed.
In business environment the pressure is very high, usually you don’t have time to test/run new features that you don’t need. You just want to do your job quick and right, so this is left to people who really need those features or do have enough time to test them well.
I think that’s a rather myopic position to take. If you don’t start preparing for IPv6 now, you’ll be in for a world of hurt when you have to start using it. It’s better to prepare now, before it’s a crisis.
I agree with Mr. Morr.
Why disable IPv6,when you need to start migrating to IPv6.
I understand in one sense,that there is little native global IPv6 in some areas,but that is really no excuse.
The way I see it,adoption of IPv6 will be as desirable for some,as learning the metric system.
A remark for all IPv6 early adopters.
Disabling IPv6 may somewhat reduce possible attack vectors. I have seen instances of SSH brute forcing through IPv6 in data centers.
So, the reason I found myself disabling ipv6 was because I was concerned about this message that was riddled throughout lsof on an apache server i maintain (primarily for downloads)
httpd 31611 root 8u sock 0,5 34880 can’t identify protocol
I think it was causing some memory issues for me but I’ll be able to say for sure tomorrow as I just disabled ipv6 and am letting it run for a bit. I certainly can’t deny Derek’s rationale though regarding not disabling and I’m curious to hear any thoughts from the early ipv6 adopter camp.
& there’s more @ g-loaded.eu/2008/05/12/how-to-disable-ipv6-in-fedora-and-centos/
We also had issues with IPv6 on Debian 4. In a special environment, having IPv6 enabled causes the first DNS query to fail. Any successive dns queries will succeed (first goes to ipv6, second to ipv4, then cache).
George
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