Understanding SERVFAIL (for google)

[Mark Andrews]

> In general, if dig shows SERVFAIL are there specific options that will
> help detail why that's being reported?

	SERVFAIL is the generic error message.

	There are lots of things that can cause a SERVFAIL.  Bad
	delegations,  bad responses to EDNS queries,  the servers
	not being authoritative,  firewalls blocking queries /
	replies and lastly code bugs.

	This is not a exhaustive list of things.  It a matter of
	eliminating things one by one until you find the fault.

	Mark

--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org