nanog mailing list archives

Re: Yahoo DNS broken?


From: Nathan Ward <nanog () daork net>
Date: Thu, 4 Dec 2008 09:41:10 +1300

There is no A records, correct.
There is a CNAME though:
www.wa1.b.yahoo.com. 45 IN CNAME www- real.wa1.b.yahoo.com.
www-real.wa1.b.yahoo.com. 45    IN      A       209.131.36.158

On 4/12/2008, at 9:36 AM, Larry Daberko wrote:

I am unable to resolve www.yahoo.com.  Tracing DNS back from the root
servers shows that www.yahoo.com is a CNAME to www.wa1.b.yahoo.com and
there are no A records for that hostname.

Anyone have more details or a Yahoo contact? I'm unable to get to their
webpage as it is :-)

-Larry Daberko
iServe Technologies




$ dig @ns1.yahoo.com www.yahoo.com

; <<>> DiG 9.4.2 <<>> @ns1.yahoo.com www.yahoo.com
; (1 server found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 56431
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;www.yahoo.com.                 IN      A

;; ANSWER SECTION:
www.yahoo.com.          300     IN      CNAME   www.wa1.b.yahoo.com.

;; AUTHORITY SECTION:
wa1.b.yahoo.com.        300     IN      NS      yf1.yahoo.com.
wa1.b.yahoo.com.        300     IN      NS      yf2.yahoo.com.

;; ADDITIONAL SECTION:
yf1.yahoo.com.          1800    IN      A       68.142.254.15
yf2.yahoo.com.          1800    IN      A       68.180.130.15

;; Query time: 15 msec
;; SERVER: 68.180.131.16#53(68.180.131.16)
;; WHEN: Wed Dec  3 15:34:09 2008
;; MSG SIZE  rcvd: 123


but looking up the host itself gives no answer


$ dig @ns1.yahoo.com www.wa1.b.yahoo.com

; <<>> DiG 9.4.2 <<>> @ns1.yahoo.com www.wa1.b.yahoo.com
; (1 server found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 34875
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 2
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;www.wa1.b.yahoo.com.           IN      A

;; AUTHORITY SECTION:
wa1.b.yahoo.com.        300     IN      NS      yf1.yahoo.com.
wa1.b.yahoo.com.        300     IN      NS      yf2.yahoo.com.

;; ADDITIONAL SECTION:
yf1.yahoo.com.          1800    IN      A       68.142.254.15
yf2.yahoo.com.          1800    IN      A       68.180.130.15

;; Query time: 15 msec
;; SERVER: 68.180.131.16#53(68.180.131.16)
;; WHEN: Wed Dec  3 15:35:07 2008
;; MSG SIZE  rcvd: 105



!DSPAM:22,4936edf127844578318734!



--
Nathan Ward






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