[dns-operations] Firewall defaults and EDNS

Mark Andrews marka at isc.org
Thu Nov 20 04:16:05 UTC 2014

	If you are running a firewall in front of your nameserver
	and it is blocking EDNS Verion 1 queries or EDNS queries
	with flag bits set or EDNS queries with unknown options by
	default could you send the vendor and release image so I
	can generate a list of broken by default for EDNS firewalls.

	dig +edns=1 $zone @$server
	dig +ednsopt=100 $zone @$server	[1]
	dig +ednsflags=0x40 $zone @$server [1]


	[1] Requires dig from BIND 9.11 available in the master branch
	at source.isc.org

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

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