id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
95	Return error for non-IN classes in DNS server	kchen	ecprice	"The DNS server currently returns results for class IN, regardless of what class the server is queried for.  For example:

kchen@scyther:~$ dig ch abra.xvm.mit.edu @sipb-xen-dev.mit.edu
;; Warning: Message parser reports malformed message packet.

; <<>> DiG 9.3.4 <<>> ch abra.xvm.mit.edu @sipb-xen-dev.mit.edu
; (1 server found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4134
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;abra.xvm.mit.edu.              CH      A

;; ANSWER SECTION:
abra.xvm.mit.edu.       900     IN      A       18.181.0.105

;; AUTHORITY SECTION:
xvm.mit.edu.            3600    IN      SOA     sipb-xen-dev.mit.edu. sipb-xen.mit.edu. 1 3600 900 3600000 21600

This doesn't operationally affect anything, of course.  The server should probably return status REFUSED (which is what BIND does, except for a few special names).  An NXDOMAIN response is probably OK too, since NXDOMAIN is on a per-class level, although I'm not sure what you would fill the other sections of the response with."	defect	new	trivial		dns