Again question about edns (like swupdl.adobe.com)

[Mike Hoskins (michoski)]

For what little it's worth, I've seen this somewhat even on 9.8 (it's not new), though increasingly on 9.9...not saying it's BIND specific, just that I've hit these kind of annoyances with remote servers awhile now.

I've tried explaining this on numerous internal email threads, tickets, webex (calls are great), etc...but it is quite frustrating, because so long as reasonably savvy users can "dig @8.8.8.8" and get a response, they don't believe your server isn't broken.

From: IDS Submit <submit at ids.it<mailto:submit at ids.it>>
Date: Wednesday, October 22, 2014 at 6:30 AM
To: "bind-users at isc.org<mailto:bind-users at isc.org>" <bind-users at isc.org<mailto:bind-users at isc.org>>
Subject: Again question about edns (like swupdl.adobe.com)

Good morning,

with www.acer.it<http://www.acer.it> I have the same problem as swupdl.adobe.com

NXDOMAIN with bind 9.10 but NOERROR with Google DNS

I have read the Mark Andrews reply on july 4 2014:
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It looks like nameserver vendors are not doing even rudimentry checks like those above.  DiG has thos options so that we could perform checks like these.



Until Adobe fix their broken servers you can use a server clause to disable sending SIT requests to them.  Obviously this does not scale.



      server <address> { request-sit no; };



Mark
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But this doesn’t solve the problem on others domains …
… should be possible enable “request-sit no” for all domains and not manually add it?
Because I think there are lot of domains with this problem :(


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\Server\Bind\bin\dig.exe @81.174.15.142 www.acer.it

; <<>> DiG 9.10.1 <<>> @81.174.15.142 www.acer.it
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 42228
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;www.acer.it.                   IN      A

;; ANSWER SECTION:
www.acer.it.            300     IN      CNAME   public-akamai.gtm.acer.com.

;; AUTHORITY SECTION:
gtm.acer.com.           60      IN      SOA     gtm1.acer.com. hostmaster.gtm1.acer.com. 482 10800 3600 604800 60

;; Query time: 572 msec
;; SERVER: 81.174.15.142#53(81.174.15.142)
;; WHEN: Wed Oct 22 12:13:12 ora legale Europa occidentale 2014
;; MSG SIZE  rcvd: 132
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------------------------------------------------------------------
\Server\Bind\bin\dig.exe @8.8.8.8 www.acer.it

; <<>> DiG 9.10.1 <<>> @8.8.8.8 www.acer.it
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 34510
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;www.acer.it.                   IN      A

;; ANSWER SECTION:
www.acer.it.            281     IN      CNAME   public-akamai.gtm.acer.com.
public-akamai.gtm.acer.com. 11  IN      CNAME   www.acer.com.edgesuite.net.
www.acer.com.edgesuite.net. 12306 IN    CNAME   a492.b.akamai.net.
a492.b.akamai.net.      19      IN      A       88.149.196.137
a492.b.akamai.net.      19      IN      A       88.149.196.145

;; Query time: 60 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Wed Oct 22 12:14:02 ora legale Europa occidentale 2014
;; MSG SIZE  rcvd: 180
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Thanks in advance and best regards

Staff IDS
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