One A record fails on one server on Sunday evening

[Bill Larson]

Josh Luthman <josh at imaginenetworksllc.com> said:

> Let me say it this way...
> 
> Starting ~7PM EST Sunday evening the command
> 
> dig mail.alexandertelecominc.com @74.218.88.168 #fails
> dig mail.alexandertelecominc.com @4.2.2.2 #works
> 
> until I issue
> 
> rndc reload && /etc/init.d/named restart #on the 74.218.88.168 server

Ok, we're getting somewhere.  Do the logs on your 74.218.88.168 server tell 
you anything?  Is there anything unusual logged prior to ~7PM EST Sunday?

Again, without knowing more there is no way that we can identify exactly 
what occurred to cause the query to fail.  Also, even with all the 
information that is available, we may still not be able to identify the 
problem.

Then again, is this a one time situation or does it occur regularly?

> Josh Luthman
> Office: 937-552-2340
> Direct: 937-552-2343
> 1100 Wayne St
> Suite 1337
> Troy, OH 45373
> 
> "When you have eliminated the impossible, that which remains, however
> improbable, must be the truth."
> --- Sir Arthur Conan Doyle

I don't know exactly why, but this statement struck me.  Sherlock Holmes 
should never have been susceptable to this logical falicy.  

The opposite of "the impossible" is "the possible", but no matter how 
improbable this "possible" may be, this is not the same as "truth".

A counter example, something occurs and there are three posited causes.  One 
cause is "impossible" and can be eliminated.  This leaves the other two 
possibilities, no matter how improbable.  This does NOT make both, or 
either, of these possibilities "the truth".

> On Mon, Nov 2, 2009 at 10:33 AM, Bill Larson <wllarso at swcp.com> wrote:
> 
> > Josh Luthman <josh at imaginenetworksllc.com> said:
> >
> > > --000e0cd32f54da30b8047764ddcc
> > > Content-Type: text/plain; charset=ISO-8859-1
> > >
> > > The issue is that the A record no longer gets resolved.
> > >
> > > The command dig mail.alexandertelecominc.com @firstserver times out.
> >  Not
> > > sure what else I can provide that would help.
> >
> > Well, when you are querying this "firstserver" (whatever that is - giving
> > us
> > a fully qualified domain name would be helpful), it times out.  The DNS
> > server on this "firstserver" isn't answering the query.
> >
> > "Not sure what else I can provide that would help".  You don't give us 
much
> > to work with.
> >
> > Bill Larson
> >
> > > Josh Luthman
> > > Office: 937-552-2340
> > > Direct: 937-552-2343
> > > 1100 Wayne St
> > > Suite 1337
> > > Troy, OH 45373
> > >
> > > "When you have eliminated the impossible, that which remains, however
> > > improbable, must be the truth."
> > > --- Sir Arthur Conan Doyle
> > >
> > >
> > > On Mon, Nov 2, 2009 at 10:13 AM, Jeremy C. Reed <jreed at isc.org> wrote:
> > >
> > > > > I am looking for any suggestions or ideas to help fix this issue.
> > Thanks
> > > > in
> > > > > advance!
> > > >
> > > > To get good help, you may want to tell us what the issue is. Provide
> > > > real names and show your real tests. Also the version of BIND you are
> > > > using is out of date and is no longer supported.
> > >
> > > --000e0cd32f54da30b8047764ddcc
> > > Content-Type: text/html; charset=ISO-8859-1
> > > Content-Transfer-Encoding: quoted-printable
> > >
> > > The issue is that the A record no longer gets resolved.<br><br>The
> > command
> > =
> > > dig <a
> > href=3D"http://mail.alexandertelecominc.com">mail.alexandertelecomin=
> > > c.com</a> @firstserver times out.=A0 Not sure what else I can provide
> > that
> > =
> > > would help.<br>
> > >
> > > <br>Josh Luthman<br>Office: 937-552-2340<br>Direct: 937-552-
2343<br>1100
> > Wa=
> > > yne St<br>Suite 1337<br>Troy, OH 45373<br><br>"When you have
> > eliminate=
> > > d the impossible, that which remains, however improbable, must be the
> > truth=
> > > ."<br>
> > >
> > > --- Sir Arthur Conan Doyle<br>
> > > <br><br><div class=3D"gmail_quote">On Mon, Nov 2, 2009 at 10:13 AM,
> > Jeremy
> > =
> > > C. Reed <span dir=3D"ltr"><<a
> > href=3D"mailto:jreed at isc.org">jreed at isc.or=
> > > g</a>></span> wrote:<br><blockquote class=3D"gmail_quote"
> > style=3D"borde=
> > > r-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; 
padding-
> > le=
> > > ft: 1ex;">
> > >
> > > <div class=3D"im">> I am looking for any suggestions or ideas to 
help
> > fi=
> > > x this issue.=A0 Thanks in<br>
> > > > advance!<br>
> > > <br>
> > > </div>To get good help, you may want to tell us what the issue is.
> > Provide<=
> > > br>
> > > real names and show your real tests. Also the version of BIND you 
are<br>
> > > using is out of date and is no longer supported.</blockquote></div><br>
> > >
> > > --000e0cd32f54da30b8047764ddcc--
> > >
> >
> >
> >
> > --
> >
> >
> >
> >
> 



--