<div dir="ltr">I'm not sure what you are asking - DNS servers are supposed to be there in order to respond to queries, why shouldn't they answer queries? The slaves are there exactly as a back-up in case the master becomes unavailable. What else do you think they are there for?<br>
<br>If at all - the usual setup is that the master is hidden behind a firewall and only the slaves answer queries. This is supposed to make it harder to inject bad records into the database since the secondaries should only read from a secure none-public server.<br>
<br>BTW - if you have your own servers and your own IP address block then check options for using anycast to get DNS queries routed to the closest DNS server (<a href="http://en.wikipedia.org/wiki/Anycast">http://en.wikipedia.org/wiki/Anycast</a>).<br>
<br>(we just use GoDaddy's anycast DNS servers for our corporate domain and Neustar for the heavy-lifting SaaS application domain, with automatic DNS fail-over in case one of our DC's becomes unavailable, at least for now. I don't see a way to use GoDaddy as pure secondary DNS service but a quick call to their very helpful support can clear that, and there must be many other providers you can use for that).<br>
<br>--Amos<br><br><div class="gmail_quote">2011/6/17 Hetz Ben Hamo <span dir="ltr"><<a href="mailto:hetzbh@gmail.com">hetzbh@gmail.com</a>></span><br><blockquote class="gmail_quote" style="margin:0 .8ex;border-left:1px #ccc solid;border-right:1px #ccc solid;padding-left:1ex;padding-right:1ex">
<div dir="rtl"><div dir="ltr">Hi,</div><div dir="ltr"><br></div><div dir="ltr">After big frustration from some DNS providers, I've decided to roll my own with servers here in Israel, Ireland, and 2 US servers.</div><div dir="ltr">
I've configured the Master in Israel and the rest are slaves.</div><div dir="ltr"><br></div><div dir="ltr">I threw some domains, and the sync works great.</div><div dir="ltr"><br></div><div dir="ltr">My problem is simple: The server in Israel answer queries from the world, but should the slaves answer too? </div>
<div dir="ltr">If not, what happens when the master goes down?</div><div dir="ltr"><br></div><div dir="ltr">I checked some big names servers (like Yahoo) - their servers don't answer any queries.</div><div dir="ltr">
<br>
</div><div dir="ltr">So should the slave server be configured not to answer any query from outside?</div><div dir="ltr"><br></div><div dir="ltr">(I know it's a non issue in corporates where you can configure both master and slave answer from internal IP's, but here there are no internal IP's).</div>
<div dir="ltr"><br></div><div dir="ltr">Thanks,</div><div dir="ltr">Hetz</div><div dir="ltr"><br></div>
</div>
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