Of long names...

[Timothe Litt]

Discussing a 'you don't handle long names' issue that I discovered with
an application's developer, I thought I'd create a test case or two for him.

I did, but they don't resolve.  I might be missing something, so some
other eyes would be appreciated.

The test domain is hosted on godaddy's DNS.  (Because, well, it's a test
domain.)

dns fingerprint (w3dt.net) claims their server is 'VeriSign ATLAS'  Does
anyone have experience with this server?

The recursive servers queried are mine (bind) - I've flushed their
caches.  I've also tried several web services that run DNS lookups; the
results are consistent.  NXDOMAIN

The two names in question each have AAAA records:

 oh.what.a.beautiful.morning.oh.what.a.beautiful.day.oh.what.a.wonderful.feeling.everythings.lost.in.the.hay.litts.us


 oh-what-a-beautiful-morning.oh-what-a-beautiful-day.oh-what-a-wonderful-feeling.everythings-lost-in-the-hay.litts.us

The current zone serial number is 2015031503

dig reports that serial with a NXDOMAIN response to each name, so it's
not a propagation issue.

Exporting the zone file (yes, this is the entire file  -- 10 records) gives:

; SOA Record
LITTS.US.    3600    IN    SOA    ns71.domaincontrol.com.    dns.jomax.net (
                2015031503
                28800
                7200
                604800
                3600
                )

; A Records
@    3600    IN    A    97.74.42.79

; CNAME Records
www    3600    IN    CNAME    @

; MX Records
@    3600    IN    MX    10    nano.litts.net

; TXT Records
@    3600    IN    TXT    "v=spf1 ip4:96.233.62.58 ip4:96.233.62.59
ip4:96.233.62.60 ip4:96.233.62.61 ip4:96.233.62.62 mx a:micro.litts.net
a:nano.litts.net a:pico.sb.litts.net a:overkill.sb.litts.net
a:hagrid.sb.litts.net a:smtp.litts.net -all"

; AAAA Records
oh.what.a.beautiful.morning.oh.what.a.beautiful.day.oh.what.a.wonderful.feeling.everythings.lost.in.the.hay   
1800    IN    AAAA    2001:4830:11a2:941::43
beautiful.feeling    600    IN    AAAA    2001:4830:11a2:941::43
oh-what-a-beautiful-morning.oh-what-a-beautiful-day.oh-what-a-wonderful-feeling.everythings-lost-in-the-hay   
600    IN    AAAA    2001:4830:11a2:941::43

; NS Records
@    3600    IN    NS    ns71.domaincontrol.com
@    3600    IN    NS    ns72.domaincontrol.com

Dig lookups fail on the long names, but the SOA shows the correct serial.

 dig
oh.what.a.beautiful.morning.oh.what.a.beautiful.day.oh.what.a.wonderful.feeling.everythings.lost.in.the.hay.litts.us
aaaa

; <<>> DiG 9.9.4-P1 <<>>
oh.what.a.beautiful.morning.oh.what.a.beautiful.day.oh.what.a.wonderful.feeling.everythings.lost.in.the.hay.litts.us
aaaa
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 57860
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;oh.what.a.beautiful.morning.oh.what.a.beautiful.day.oh.what.a.wonderful.feeling.everythings.lost.in.the.hay.litts.us.
IN AAAA

;; AUTHORITY SECTION:
litts.us.               3600    IN      SOA     ns71.domaincontrol.com.
dns.jomax.net. 2015031503 28800 7200 604800 3600

;; Query time: 136 msec
;; SERVER: 192.168.148.6#53(192.168.148.6)
;; WHEN: Sun Mar 15 06:57:55 EDT 2015
;; MSG SIZE  rcvd: 216

 dig
oh-what-a-beautiful-morning.oh-what-a-beautiful-day.oh-what-a-wonderful-feeling.everythings-lost-in-the-hay.litts.us
aaaa

; <<>> DiG 9.9.4-P1 <<>>
oh-what-a-beautiful-morning.oh-what-a-beautiful-day.oh-what-a-wonderful-feeling.everythings-lost-in-the-hay.litts.us
aaaa
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 60478
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;oh-what-a-beautiful-morning.oh-what-a-beautiful-day.oh-what-a-wonderful-feeling.everythings-lost-in-the-hay.litts.us.
IN AAAA

;; AUTHORITY SECTION:
litts.us.               2617    IN      SOA     ns71.domaincontrol.com.
dns.jomax.net. 2015031503 28800 7200 604800 3600

;; Query time: 7 msec
;; SERVER: 192.168.148.4#53(192.168.148.4)
;; WHEN: Sun Mar 15 07:01:16 EDT 2015
;; MSG SIZE  rcvd: 216

I have verified that bind is happy to create and resolve similar names...

Oh, and the third AAAA record does resolve, which makes me suspicious of
the name length.

Any ideas on this mystery?

-- 
Timothe Litt
ACM Distinguished Engineer
--------------------------
This communication may not represent the ACM or my employer's views,
if any, on the matters discussed. 


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