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02-16-2008, 05:44 AM
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 openbsd 3.5 and IPv6 - can it be disabled? 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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02-16-2008, 05:50 AM
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| Re: openbsd 3.5 and IPv6 - can it be disabled? 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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