Hello list 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:[email protected] 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 _______________________________________________ swinog mailing list [email protected] http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog
