Re: openbsd 3.5 and IPv6 - can it be disabled?
From: George Thorogood (thorogood_at_mailinator.com)
Date: 07/25/04
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Date: 25 Jul 2004 16:53:38 -0500
On Sun, 20 Jun 2004 17:42:55 GMT, JoeSmith <JoeSmith@IDontWantSpam.bogus.bogusaddress.com> wrote:
Kernel recompile is the only way I know of. But it's so easy.
There are only a few simple commands to get the whole thing done.
Now figuring out exactly what kernel features your specific system
requires and removing everything else from the kernel is a little
more challenging. But still not that bad.
George
>Most of the rest of the world is not up to IPv6. I am wondering if one
>can disable use of IPv6 without recompiling the kernel. I have looked
>on news grous and did not see anything. I was hoping that 3.5 might be
>new enough that it would have this.
>
>The reason that I want to disable IPv6 is that some programs take
>several mintues to complete an operation when using IPv6. The main
>problem appears to be that DNS IPv6 packets are not answered and it
>takes a long time for the retry and so forth. For example, to do a
>'whois yahoo.com', it would take about two minutes. Also, I was going
>to setup apache 2.0.49 as a proxy; however, it takes a couple of minutes
>to get a single page due to this problem.
>
>Also, if I know that IPv6 DNS will not get answered, it would seem
>inneficient to even have the OS try IPv6 first. Why not skip to IPv4?
>
>As a separate note, doing nslookup on host being looked up by whois
>completes in less than a second. I suspect that whois and apache httpd
>might make a different call to for host name resolution than most programs.
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