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Is there a free service for checking for common DNS errors on your domain? I previously used dnsstuff.com for this, but they since moved to a paid model.

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Didn't realize dnsstuff.com went to a paid model. :-( –  Brian Knoblauch May 12 '09 at 18:41
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Do not regret it, they were always spending spurious warnings about missing glue... –  bortzmeyer May 13 '09 at 6:40

5 Answers 5

up vote 13 down vote accepted

I use a combination of:

and

...as well as manual querying using dig, host, WHOIS, etc...

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IntoDNS has no IPv6 support (and therefore produces spurious errors on IPv6-only nameservers). It sends errors when there is no "www" name in the zone which is quite stupid. It can not test TLD (it says "Invalid request!) –  bortzmeyer May 13 '09 at 6:46
    
DNSsy has no IPv6 support (and therefore produces spurious errors on IPv6-only nameservers). It sends errors when there is no "www" name in the zone which is quite stupid. –  bortzmeyer May 13 '09 at 6:48

There are several. I recommend Zonecheck, which is also available as free software that you can install on your own machine. The greatest thing about Zonecheck is that you can edit the configuration to change the policy (changing severity of tests from warning to fatal or the opposite, not running some tests, etc).

DNScheck is nice, too, and the only tool able to check DNSSEC.

I wrote a paper listing and comparing many online tools.

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Hmmm, Zonecheck stops on first error, which isn't helpful (at least, in the web interface). –  Kzqai Sep 11 '12 at 21:32

Try this one:

http://www.squish.net/dnscheck/

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As they say on the page, for experts only (it is quite low-level). –  bortzmeyer May 13 '09 at 6:56

A couple more:

And a quick guide on how to check your DNS yourself.

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howismydns.com has no IPv6 support and fail to detect the issue, so it produces spurious errors on IPv6-only nameservers. I –  bortzmeyer May 13 '09 at 6:54
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checkdns sends a spurious (and quite stupid, IMHO) warning when you have only one MX server. It seems to indicate a lack of knowledge regarding the way email works. –  bortzmeyer May 13 '09 at 6:55

You should definitely check out http://dnscog.com/report/serverfault.com

They give a nice detailed report and supply some recommendations too.

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