Standard Nagios Plugins 1.4.9 and IPv6 problem?

[Hugo van der Kooij]

On Fri, 21 Sep 2007, Holger Weiss wrote:

> * "Frost, Mark {PBG}" <mark.frost1 at pepsi.com> [2007-09-21 11:14]:
>> It does open a socket with parameters for IPv6 (AF_INET6) and then tells
>> the resolver to run the query.
>
> The plugins won't actually open an IPv6 socket, they merely call
> getaddrinfo(3) which, depending on how it's called, may query your
> nameserver for an AAAA record before querying it for an A record.  This
> is done before opening a socket.
>
>> I guess the big problem I have here is what is necessary to convince an
>> application that a system does not use IPv6?  That there's no interface
>> configured to use IPv6? (check)  That there's no routing or other
>> networking setup at boot time to enable it? (check)  I feel that I'm an
>> unfortunate victim of Linux just throws IPv6 include files into its base
>> configuration whether I want them or not so the plugins assume that they
>> might as well try it.
>
> As I said, the plugins don't actually "decide" to try IPv6 DNS lookups,
> they just call the system's getaddrinfo(3) function without explicitly
> stating that the function should only try IPv4 address lookups.  The
> latter could be done and I'll implement that behaviour for "./configure
> --without-ipv6".


Have a look at the thread: 
http://blog.florianlaws.de/archives/126-BIND-slow-on-SLES9-Disable-IPv6.htmlhttp://blog.florianlaws.de/archives/126-BIND-slow-on-SLES9-Disable-IPv6.html

It seems Centos 3 and Centos 4 received fixes for unexpected AAAA
queries.

Hugo.

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 	hvdkooij at vanderkooij.org	http://hugo.vanderkooij.org/
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