[Postfixbuch-users] OT: DNS Probleme

Sascha Peters postfix-list at novuage.de
Mi Nov 28 08:29:26 CET 2012


Hallo,

kann sich jemand folgenden Erklären?

Ich habe auf ein und dem selben Ubuntu 10.04 Server Abfragen über das 
DNS mit "host" und mit "dig" gemacht. Mit unterschiedlichen Ergebnissen.

     A-RR von follong.nl
     MX-RR von follong.nl
     A-RR von follong.nl

Hintergrund... ich habe von einem E-Mailserver die Meldung erhalten das 
er 5 Tage lang die E-Mail nicht zustellen konnte. Folgender Fehler von 
"qmail"... Das wollte ich auf meinem Server dann kurz testen, und bekamm 
dann die wiedersprüchlichen Informationen auf meinem Server.

--- Schnipp ---
"relay=follong.nl., dsn=4.0.0, stat=Deferred: Name server: follong.nl.: 
host name lookup failure"
--- Schnapp ---



--- Schnipp ---

#> host -t a follong.nl
follong.nl has address 159.253.0.151
#> host -t mx follong.nl
follong.nl mail is handled by 10 mail.follong.nl.
#> host -t a mail.follong.nl
mail.follong.nl has address 159.253.0.151


#> dig a follong.nl

; <<>> DiG 9.7.0-P1 <<>> a follong.nl
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 24072
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2

;; QUESTION SECTION:
;follong.nl.                    IN      A

;; ANSWER SECTION:
follong.nl.             13955   IN      A       159.253.0.151

;; AUTHORITY SECTION:
follong.nl.             6755    IN      NS      ns2.windvogelserver.com.
follong.nl.             6755    IN      NS      ns1.windvogelserver.com.

;; ADDITIONAL SECTION:
ns1.windvogelserver.com. 13957  IN      A       159.253.0.117
ns2.windvogelserver.com. 13957  IN      A       159.253.0.117

;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Nov 28 08:24:57 2012
;; MSG SIZE  rcvd: 131

[server01]:~# dig a follong.nl

; <<>> DiG 9.7.0-P1 <<>> a follong.nl
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 24072
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2

;; QUESTION SECTION:
;follong.nl.                    IN      A

;; ANSWER SECTION:
follong.nl.             13955   IN      A       159.253.0.151

;; AUTHORITY SECTION:
follong.nl.             6755    IN      NS      ns2.windvogelserver.com.
follong.nl.             6755    IN      NS      ns1.windvogelserver.com.

;; ADDITIONAL SECTION:
ns1.windvogelserver.com. 13957  IN      A       159.253.0.117
ns2.windvogelserver.com. 13957  IN      A       159.253.0.117

;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Nov 28 08:24:57 2012
;; MSG SIZE  rcvd: 131

[server01]:~# dig mx follong.nl

; <<>> DiG 9.7.0-P1 <<>> mx follong.nl
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 728
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;follong.nl.                    IN      MX

;; Query time: 25 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Nov 28 08:25:03 2012
;; MSG SIZE  rcvd: 28

[server01]:~# dig a mail.follong.nl

; <<>> DiG 9.7.0-P1 <<>> a mail.follong.nl
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 12921
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;mail.follong.nl.               IN      A

;; Query time: 26 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Nov 28 08:25:09 2012
;; MSG SIZE  rcvd: 33


#> dig mx follong.nl

; <<>> DiG 9.7.0-P1 <<>> mx follong.nl
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 728
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;follong.nl.                    IN      MX

;; Query time: 25 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Nov 28 08:25:03 2012
;; MSG SIZE  rcvd: 28


#> dig a mail.follong.nl

; <<>> DiG 9.7.0-P1 <<>> a mail.follong.nl
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 12921
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;mail.follong.nl.               IN      A

;; Query time: 26 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Nov 28 08:25:09 2012
;; MSG SIZE  rcvd: 33


--- Schnapp ---


Gruß
Sascha




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