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From Jeff Trawick <traw...@gmail.com>
Subject Re: [users@httpd] What IP address is this log entry coming from? (Is "::" a valid IP address?)
Date Thu, 02 Sep 2010 18:30:02 GMT
On Wed, Sep 1, 2010 at 11:12 AM, Tom Evans <tevans.uk@googlemail.com> wrote:

> On Tue, Aug 31, 2010 at 12:00 AM, Apache Issues <apacheissues@yahoo.com>
> wrote:
> > I'm using:
> >
> > CustomLog "/var/log/apache2/access_log" "%a %l %u %t \"%r\" %>s %b
> > \"%{Referer}i\""
> >
> > And I occasionally see this right around the time the CPU starts running
> at
> > 100%:
> >
> > :: - - [27/Aug/2010:12:28:01 -0700] "GET /favicon.ico HTTP/1.1" 200 - "-"
> >
> > %a is supposed to be an IP address, so what IP address is "::"? I'm only
> > somewhat familiar with IPv6 but I've never seen "::" before.
>
> http://en.wikipedia.org/wiki/IPv6_address#Notation
>
> One or any number of consecutive groups of zero value may be replaced
> with two colons. [ ... ]
>
> The localhost (loopback) address, 0:0:0:0:0:0:0:1, and the IPv6
> unspecified address, 0:0:0:0:0:0:0:0, are reduced to ::1 and ::,
> respectively.
>

and it is bogus to have the unspecified address as the client IP address

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