Let’s contact their DNS server for the A record for bookride.com:
$ dig @126.96.36.199 www.bookride.com
; <<>> DiG 9.3.6-P1-RedHat-9.3.6-4.P1.el5_4.2 <<>> @188.8.131.52 www.bookride.com
; (1 server found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 10397
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;www.bookride.com. IN A
;; ANSWER SECTION:
www.bookride.com. 3600 IN CNAME ghs.google.com.
;; AUTHORITY SECTION:
google.com. 86400 IN SOA ns1.aplus.net. hostmaster.aplus.net. 1007 86403 3600 3600000 86400
;; Query time: 304 msec
;; SERVER: 184.108.40.206#53(220.127.116.11)
;; WHEN: Sat Aug 14 01:18:15 2010
;; MSG SIZE rcvd: 119
This is an invalid packet: It is marked as a NXDOMAIN (complete with a SOA record in the NS/Authority section), but it is actually a CNAME.
I have updated Deadwood to treat these broken packets like ordinary CNAME packets. The snapshot can be downloaded here:
I am also in the process of trying to file a bug report with aplus.net.