Sali Daniel
vielen Dank für's veröffentlichen dieses Verhaltens.
Wir konnten es zusammen "flicken". Gruss
Martin.Wismer.
On 19.06.13 14:07, Ambauen Daniel wrote:
Does anybody know why cns7.bluewin.ch does answer one out of four specific
queries
with an mixed case DNS answer?
;; QUESTION SECTION:
;_autodiscover._tcp.id.ethz.ch. IN SRV
;; ANSWER SECTION:
_autodiscover._tcp.id.ethz.ch. 43200 IN SRV 0 100 443 mail.ethz.ch.
;; ANSWER SECTION:
_autodiscover._tcp.id.ethz.ch. 43200 IN SRV 0 100 443 mail.EThZ.CH.
The Outlook mail client is treating the DNS answers case sensitive so
mail.ethz.ch and mail.EThZ.CH are not the same.
Every time the mail client discovers a different "mail.ethz.ch" the user has to
accept the new mail.etHz.cH server.
>From my point of view the use of Bit 0x20 in DNS Labels should happen between
caching and authoritative name servers.
http://tools.ietf.org/html/draft-vixie-dnsext-dns0x20-00
Is my point of view wrong?
Regards
Daniel
------------------------------------------------------------------------
Daniel Ambauen
Hostmaster
ETH Zentrum WET B 1 mailto:daniel.amba...@id.ethz.ch
Weinbergstrasse 43 tel : +41 44 632 35 48
CH-8092 Zürich
------------------------------------------------------------------------
C:\dig>dig @195.186.1.162 _autodiscover._tcp.id.ethz.ch srv
; <<>> DiG 9.3.2 <<>> @195.186.1.162 _autodiscover._tcp.id.ethz.ch srv
; (1 server found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 924
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; QUESTION SECTION:
;_autodiscover._tcp.id.ethz.ch. IN SRV
;; ANSWER SECTION:
_autodiscover._tcp.id.ethz.ch. 43200 IN SRV 0 100 443 mail.ethz.ch.
;; ADDITIONAL SECTION:
mail.ethz.ch. 2775 IN A 129.132.126.69
;; Query time: 93 msec
;; SERVER: 195.186.1.162#53(195.186.1.162)
;; WHEN: Wed Jun 19 10:50:50 2013
;; MSG SIZE rcvd: 95
C:\dig>dig @195.186.1.162 _autodiscover._tcp.id.ethz.ch srv
; <<>> DiG 9.3.2 <<>> @195.186.1.162 _autodiscover._tcp.id.ethz.ch srv
; (1 server found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1411
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; QUESTION SECTION:
;_autodiscover._tcp.id.ethz.ch. IN SRV
;; ANSWER SECTION:
_autodiscover._tcp.id.ethz.ch. 43200 IN SRV 0 100 443 mail.ethz.ch.
;; ADDITIONAL SECTION:
mail.ethz.ch. 2706 IN A 129.132.126.69
;; Query time: 483 msec
;; SERVER: 195.186.1.162#53(195.186.1.162)
;; WHEN: Wed Jun 19 10:51:04 2013
;; MSG SIZE rcvd: 95
C:\dig>dig @195.186.1.162 _autodiscover._tcp.id.ethz.ch srv
; <<>> DiG 9.3.2 <<>> @195.186.1.162 _autodiscover._tcp.id.ethz.ch srv
; (1 server found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1611
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; QUESTION SECTION:
;_autodiscover._tcp.id.ethz.ch. IN SRV
;; ANSWER SECTION:
_autodiscover._tcp.id.ethz.ch. 43193 IN SRV 0 100 443 mail.ethz.ch.
;; ADDITIONAL SECTION:
mail.ethz.ch. 2699 IN A 129.132.126.69
;; Query time: 156 msec
;; SERVER: 195.186.1.162#53(195.186.1.162)
;; WHEN: Wed Jun 19 10:51:11 2013
;; MSG SIZE rcvd: 95
C:\dig>dig @195.186.1.162 _autodiscover._tcp.id.ethz.ch srv
; <<>> DiG 9.3.2 <<>> @195.186.1.162 _autodiscover._tcp.id.ethz.ch srv
; (1 server found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1171
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; QUESTION SECTION:
;_autodiscover._tcp.id.ethz.ch. IN SRV
;; ANSWER SECTION:
_autodiscover._tcp.id.ethz.ch. 43200 IN SRV 0 100 443 mail.EThZ.CH.
;; ADDITIONAL SECTION:
mail.EThZ.CH. 2848 IN A 129.132.126.69
;; Query time: 202 msec
;; SERVER: 195.186.1.162#53(195.186.1.162)
;; WHEN: Wed Jun 19 10:51:12 2013
;; MSG SIZE rcvd: 95
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