DNSSEC Readiness

Mark Andrews marka at isc.org
Mon Feb 15 18:16:20 CST 2010


In message <4B798F1E.6080403 at knownelement.com>, Charles N Wyble writes:
> All,
> 
> How are folks verifying DNSSEC readiness of their environments? Any
> existing testing methodologies / resources that folks are using?
> 
> It seems like this is something that will become a front and center
> issue for help desks everywhere pretty quick. :) Ideally the more we can
> stave off issues through proactive testing/fixing the better.

Make the following queries from your recursive servers.  If you
force the query source in the nameserver add a "-b <address>" to
match.

dig -4 ns . +norec @l.root-servers.net
dig -4 ns . +dnssec +cd +norec @l.root-servers.net
dig -4 any . +dnssec +cd +norec @l.root-servers.net
dig -4 any . +dnssec +cd +norec @l.root-servers.net +vc

If any of them fail you need to fix your middleware and / or firewall
on the box.

The first +dnssec query checks that unfragmented DNSSEC responses
over 512 bytes are passed.  I get 801 bytes today when I run this
test.

The second +dnssec query checks that fragmented DNSSEC responses are
passed.  I get 1906 bytes today when I run this test.

The third +dnsec query checks that DNSSEC responses over TCP are
passed.

The non +dnssec query is a control query to check that you can reach
l.root-servers.net.

Repeat for IPv6.

dig -6 ns . +norec @l.root-servers.net
dig -6 ns . +dnssec +cd +norec @l.root-servers.net
dig -6 any . +dnssec +cd +norec @l.root-servers.net
dig -6 any . +dnssec +cd +norec @l.root-servers.net +vc
 
Mark
 
> - --
> Charles N Wyble
> Linux Systems Engineer
> charles at knownelement.com (818)280-7059
> http://www.knownelement.com
> Unless agreed upon, assume everything in this e-mail might be blogged.
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.9 (GNU/Linux)
> Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org
> 
> iEYEARECAAYFAkt5jxoACgkQJmrRtQ6zKE94eQCghyDn96HG2g7G1MDogj/yy1WB
> GFQAn22n3a48Mt9ssiwfyqN1Ne0N+X6L
> =Xt79
> -----END PGP SIGNATURE-----
> 
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org




More information about the NANOG mailing list