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<div class="moz-cite-prefix">I'm not sure I understand your concern.
nsupdate will only update the records you tell it to update. So,
if you have a "static" record, then don't target it with nsupdate
and you should be fine.<br>
<br>
When you dial a telephone number, do you worry that your dialing
may have "consequences" against telephone numbers that you
*didn't* dial? Seems very unlikely.<br>
<br>
- Kevin<br>
On 7/23/2013 7:21 AM, Manish Rane wrote:<br>
</div>
<blockquote
cite="mid:CA+z6RjHQL7uLo+9TtXw3zz_GQotHqhyiaiYYV8YAMmBgcLLW-A@mail.gmail.com"
type="cite">
<p>In that case how about other entries from same zone? I m
talking about any consequences on static entries or the ones
which I dont want to me dynamic. </p>
<div class="gmail_quote">On 23 Jul 2013 16:45, "Kumar, Naveen,
Vodafone Group" <<a moz-do-not-send="true"
href="mailto:naveen.kumar32@vodafone.com">naveen.kumar32@vodafone.com</a>>
wrote:<br type="attribution">
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div link="blue" vlink="purple" lang="EN-US"> <br>
<br>
<div>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Manish,</span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">You
can configure the zone as dynamic, this way it can
start taking nsupdates,</span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Upon
failed TCP monitor by nagios, it can fire nsupdate
command and update the A record accordingly.</span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Regards,</span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Naveen</span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
bind-users-bounces+naveen.kumar=<a
moz-do-not-send="true"
href="mailto:cw.com@lists.isc.org" target="_blank">cw.com@lists.isc.org</a>
[mailto:<a moz-do-not-send="true"
href="mailto:bind-users-bounces%2Bnaveen.kumar"
target="_blank">bind-users-bounces+naveen.kumar</a>=<a
moz-do-not-send="true"
href="mailto:cw.com@lists.isc.org" target="_blank">cw.com@lists.isc.org</a>]
<b>On Behalf Of </b>Manish Rane<br>
<b>Sent:</b> Tuesday, July 23, 2013 4:30 PM<br>
<b>To:</b> Mark Andrews<br>
<b>Cc:</b> <a moz-do-not-send="true"
href="mailto:bind-users@isc.org" target="_blank">bind-users@isc.org</a><br>
<b>Subject:</b> Re: Can I change the zone file from
command line?</span></p>
<p class="MsoNormal"> </p>
<div>
<div>
<div>
<div>
<div>
<p class="MsoNormal">Well, I am trying to
configure DNS System Monitoring stuff with
Nagios plugins. This monitor the server status
and if any of th link fails remove the said IP
from zone and reload the zone. This entry
would have low TTL so that traffic would be
routed to new entry instantly.<br>
<br>
Lets say I have two ISPs terminated on my
firewall and <a moz-do-not-send="true"
href="http://www.example.com"
target="_blank">www.example.com</a> with
private IP 172.16.3.10 is natted with 1.2.3.4
and 5.6.7.8 with TTL value 300</p>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt">Nagios
plugin check_tcp would monitor those links or
IPs on port 80 and if any of the link fails I
can have by any mean edit the zone file and
remove the IP associated with failed link so
that traffic would never reach to that IP.</p>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt">Upon
recovery the plugin will show the result GREEN and
I can again have the A record added in zone file,
thus reload the zone. Due to the low TTL I believe
there shouldn't be any issue for populating those
changes faster. </p>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt">What
say guys?<br>
<br>
</p>
</div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal"><br clear="all">
</p>
<div>
<p class="MsoNormal">
--------------------------------------------------------------------------<br>
Thanks and Regards,<br>
Manish R</p>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt"> </p>
<div>
<p class="MsoNormal">
On Tue, Jul 23, 2013 at 11:46 AM, Mark Andrews <<a
moz-do-not-send="true" href="mailto:marka@isc.org"
target="_blank">marka@isc.org</a>> wrote:</p>
<p class="MsoNormal"><br>
In message <<a moz-do-not-send="true"
href="mailto:CAN3um4yrT%2Bt7Cp2EZYWq-rM5eWx3-ygOK9VKxVUG4qbxcbpzcA@mail.gmail.com"
target="_blank">CAN3um4yrT+t7Cp2EZYWq-rM5eWx3-ygOK9VKxVUG4qbxcbpzcA@mail.gmail.com</a>></p>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt">,
Mike Hale writes:<br>
> This seems pretty straight forward.<br>
><br>
> Use your standard bash tools to modify the
file when necessary, then<br>
> you should simply be able to call rndc reload
ZONENAME in the script.</p>
</div>
<p class="MsoNormal">Though why one would want to do
this rather than just updating the<br>
zone using DDNS is beyond me. It's not like DDNS
can't be made<br>
secure by using TSIG.<br>
<br>
Normalize the zone file using named-checkzone.<br>
Use awk or similar to change the relevent entries
and update the SOA serial.<br>
Use named-checkzone to confirm that the resulting
file is still valid then<br>
if it is rename it and reload the zone.<br>
<br>
named-checkzone -D -q zone file |<br>
awk '$1 == "server" && $4 == "A" { print $1,
$2, $3, $4, NEWIP}<br>
$4 == "SOA" { $7 = $7 + 1; print }' > temp<br>
named-checkzone -q zone temp && mv temp file
&& rndc reload zone<br>
<br>
Mark</p>
<div>
<div>
<p class="MsoNormal"><br>
> On Mon, Jul 22, 2013 at 10:28 PM, Mihamina
Rakotomandimby<br>
> <<a moz-do-not-send="true"
href="mailto:mihamina@rktmb.org"
target="_blank">mihamina@rktmb.org</a>>
wrote:<br>
> > Hello,<br>
> ><br>
> > I did not catch what you're trying to
achieve.<br>
> > Please give more details.<br>
> ><br>
> ><br>
> > On 2013-07-23 08:25, Manish Rane
wrote:<br>
> ><br>
> > Hi Folks,<br>
> ><br>
> > Wondering if I can edit/change the
static zone file as a result of certain<br>
> > bash script. Well, I am trying to
write a script which will monitor the<br>
> > server on certain ports and it if
fails to connect to the server it will<br>
> > delete or add the entry from zone file
so that traffic will be routed to<br>
> > another server, possible?<br>
> ><br>
> > OR does any one aware of such solution
available in open source?<br>
> ><br>
> ><br>
> ><br>
> >
_______________________________________________<br>
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> ><br>
> ><br>
> > --<br>
> > RMA.<br>
> ><br>
> ><br>
> >
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<p class="MsoNormal"><span><span style="color:#888888">--</span></span><span
style="color:#888888"><br>
<span>Mark Andrews, ISC</span><br>
<span>1 Seymour St., Dundas Valley, NSW 2117,
Australia</span><br>
<span>PHONE: +61 2 9871 4742
INTERNET: <a moz-do-not-send="true"
href="mailto:marka@isc.org" target="_blank">marka@isc.org</a></span></span></p>
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