PowerDNS e um estranho NXDomain

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4

Permitam-me primeiro definir a cena.

Nós costumávamos usar o Bind9, mas preferimos o PowerDNS, porque, francamente, o Bind é uma droga.

Temos uma zona "primária" no nosso mestre de DNS. %código% Há outras zonas também, london.wibblesplat.com

A maioria dos endereços na zona não-oob está no intervalo oob.london.wibblesplat.com O IP do servidor dns-1 é 192.168.0.0/16. . (Não tenho certeza se isso é relevante).

Eu queria adicionar alguns IPs de acesso fora da banda (oob) à zona oob.london.wibblesplat.com no intervalo 192.168.123.140

Isso é o que está no banco de dados que direciona powerdns. 

    powerdns=# select * from records where name like '%switch%';
   id   | domain_id |                        name                        | type |    content    | ttl  | prio | change_date | ordername | auth 
--------+-----------+----------------------------------------------------+------+---------------+------+------+-------------+-----------+------
 190709 |        24 | renderchassis-1-switch-A1.london.wibblesplat.com | A    | 172.16.254.12 | 3600 |    0 |  1328715923 |           | 
 190710 |        24 | renderchassis-1-switch-A2.london.wibblesplat.com | A    | 172.16.254.3  | 3600 |    0 |  1328715923 |           | 
 190711 |        24 | renderchassis-2-switch-A1.london.wibblesplat.com | A    | 172.16.254.2  | 3600 |    0 |  1328715923 |           | 
 190712 |        24 | renderchassis-2-switch-A2.london.wibblesplat.com | A    | 172.16.254.13 | 3600 |    0 |  1328715923 |           | 
(4 rows)

Isso é o que dig diz. 

tom.oconnor@charcoal-black:~$ dig renderchassis-1-switch-A1 +search
; <<>> DiG 9.7.0-P1 <<>> renderchassis-1-switch-A1 +search
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 28586
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;renderchassis-1-switch-A1.london.wibblesplat.com. IN A

;; AUTHORITY SECTION:
london.wibblesplat.com. 1800    IN  SOA dns1.london.wibblesplat.com. hostmaster.london.wibblesplat.com. 2012020803 28800 7200 604800 86400

;; Query time: 2 msec
;; SERVER: 192.168.123.140#53(192.168.123.140)
;; WHEN: Wed Feb  8 15:58:53 2012
;; MSG SIZE  rcvd: 120

Por que o PowerDNS não está servindo ao registro? Isso existe. A consulta deve ficar bem. Há algo estranho sobre as zonas não serem atendidas se o registro A não estiver na sub-rede à qual o servidor tem acesso? (Eu não posso ver isso sendo certo, e se eu quisesse (por qualquer motivo) para re-publicar um registro para 8.8.8.8 ou qualquer outra coisa).

Alguma opinião?

EDITAR:

O enredo engrossa. Por interesse, eu eliminei os registros antigos e adicionei alguns novos, mais curtos. 

powerdns=# select * from records where name like '%rc1sw%' or content like '%rc1sw%';
   id   | domain_id |            name             | type |    content    | ttl  | prio | change_date | ordername | auth 
--------+-----------+-----------------------------+------+---------------+------+------+-------------+-----------+------
 190810 |        23 | rc1sw1.london.wibblesplat.com | A    | 172.16.254.12 | 3600 |    0 |  1328720986 |           | 
 190811 |        23 | rc1sw2.london.wibblesplat.com | A    | 172.16.254.3  | 3600 |    0 |  1328720999 |   

    |

E agora .. tom.oconnor@charcoal-black: ~ $ dig rc1sw1 + pesquisa 

; <<>> DiG 9.7.0-P1 <<>> rc1sw1 +search
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 32849
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;rc1sw1.london.wibblesplat.com. IN  A

;; ANSWER SECTION:
rc1sw1.london.wibblesplat.com. 3600 IN  A   172.16.254.12

;; Query time: 0 msec
;; SERVER: 192.168.123.140#53(192.168.123.140)
;; WHEN: Wed Feb  8 17:10:35 2012
;; MSG SIZE  rcvd: 61

E funciona.

Parece que o Powerdns pode não gostar de muitos caracteres 172.16.254.0/24 em um nome. Eu vou ter isso em mente e continuar. Ainda assim, uma resposta pode ser legal.

OK, é o -A1 que não gosta.

Dê uma olhada nisso. 

powerdns=# select * from records order by id desc limit 5;
   id   | domain_id |              name               | type |             content             | ttl  | prio | change_date | ordername | auth 
--------+-----------+---------------------------------+------+---------------------------------+------+------+-------------+-----------+------
 190830 |        23 | bunt-1-A1.london.wibblesplat.com  | A    | 127.0.0.1                       |  120 |    0 |  1328722058 |           | 
 190829 |        22 | 80.124.168.192.in-addr.arpa.    | PTR  | claret-red.london.wibblesplat.com | 3600 |    0 |  1328722007 |           | 
 190828 |        23 | claret-red.london.wibblesplat.com | A    | 192.168.124.80                  | 3600 |    0 |  1328722007 |           | 
 190825 |        23 | BUNT.london.wibblesplat.com       | A    | 127.0.0.1                       |  120 |    0 |  1328721975 |           | 
 190824 |        23 | bunt.london.wibblesplat.com       | A    | 127.0.0.1                       |  120 |    0 |  1328721967 |    

   |

e 

tom.oconnor@charcoal-black:~$ dig bunt +search

; <<>> DiG 9.7.0-P1 <<>> bunt +search
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 34027
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;bunt.london.wibblesplat.com.   IN  A

;; ANSWER SECTION:
bunt.london.wibblesplat.com. 120    IN  A   127.0.0.1

;; Query time: 1 msec
;; SERVER: 192.168.123.140#53(192.168.123.140)
;; WHEN: Wed Feb  8 17:27:15 2012
;; MSG SIZE  rcvd: 59

tom.oconnor@charcoal-black:~$ dig BUNT +search

; <<>> DiG 9.7.0-P1 <<>> BUNT +search
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 60125
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;BUNT.london.wibblesplat.com.   IN  A

;; ANSWER SECTION:
BUNT.london.wibblesplat.com. 120    IN  A   127.0.0.1

;; Query time: 0 msec
;; SERVER: 192.168.123.140#53(192.168.123.140)
;; WHEN: Wed Feb  8 17:27:20 2012
;; MSG SIZE  rcvd: 59


tom.oconnor@charcoal-black:~$ dig bunt-1-A1 +search

; <<>> DiG 9.7.0-P1 <<>> bunt-1-A1 +search
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 22009
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;    ; QUESTION SECTION:
;bunt-1-A1.         IN  A

;; AUTHORITY SECTION:
.           1800    IN  SOA a.root-servers.net. nstld.verisign-grs.com. 2012020801 1800 900 604800 86400

;; Query time: 59 msec
;; SERVER: 192.168.123.140#53(192.168.123.140)
;; WHEN: Wed Feb  8 17:27:53 2012
;; MSG SIZE  rcvd: 102
    
por Tom O'Connor 08.02.2012 / 17:01

2 respostas

6

O PostgreSQL, pelo menos sob o esquema padrão da tabela do PowerDNS, faz distinção entre maiúsculas e minúsculas. O PowerDNS baixa todas as consultas. Portanto, certifique-se de sempre diminuir seus nomes.

    
por 08.02.2012 / 19:02
3

Então, parece que o PowerDNS tem uma coisa enorme sobre strings em letras maiúsculas em certas configurações.

Aceitará BUNT e Bunt, mas não Bunt-1-A1 ou suas variantes.

Veja as edições da pergunta e este bloco de escavações. 

tom.oconnor@charcoal-black:~$ dig bunt-A0000.london.wibblesplat.com

; <<>> DiG 9.7.0-P1 <<>> bunt-A0000.london.wibblesplat.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 21482
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;bunt-A0000.london.wibblesplat.com. IN  A

;; AUTHORITY SECTION:
london.wibblesplat.com. 86400   IN  SOA dns-1.london.wibblesplat.com. root.london.wibblesplat.com. 2012020835 28800 14400 2419200 86400

;; Query time: 1 msec
;; SERVER: 192.168.123.140#53(192.168.123.140)
;; WHEN: Wed Feb  8 17:39:01 2012
;; MSG SIZE  rcvd: 116

tom.oconnor@charcoal-black:~$ dig bunt-B.london.wibblesplat.com

; <<>> DiG 9.7.0-P1 <<>> bunt-B.london.wibblesplat.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 41445
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;bunt-B.london.wibblesplat.com. IN  A

;; AUTHORITY SECTION:
london.wibblesplat.com. 86400   IN  SOA dns-1.london.wibblesplat.com. root.london.wibblesplat.com. 2012020835 28800 14400 2419200 86400

;; Query time: 1 msec
;; SERVER: 192.168.123.140#53(192.168.123.140)
;; WHEN: Wed Feb  8 17:39:09 2012
;; MSG SIZE  rcvd: 112

tom.oconnor@charcoal-black:~$ dig bunt-BUNT.london.wibblesplat.com

; <<>> DiG 9.7.0-P1 <<>> bunt-BUNT.london.wibblesplat.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 57635
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;bunt-BUNT.london.wibblesplat.com.  IN  A

;; AUTHORITY SECTION:
london.wibblesplat.com. 86400   IN  SOA dns-1.london.wibblesplat.com. root.london.wibblesplat.com. 2012020835 28800 14400 2419200 86400

;; Query time: 1 msec
;; SERVER: 192.168.123.140#53(192.168.123.140)
;; WHEN: Wed Feb  8 17:39:14 2012
;; MSG SIZE  rcvd: 115

tom.oconnor@charcoal-black:~$ dig buntA1.london.wibblesplat.com

; <<>> DiG 9.7.0-P1 <<>> buntA1.london.wibblesplat.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 29929
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;buntA1.london.wibblesplat.com. IN  A

;; AUTHORITY SECTION:
london.wibblesplat.com. 86400   IN  SOA dns-1.london.wibblesplat.com. root.london.wibblesplat.com. 2012020835 28800 14400 2419200 86400

;; Query time: 1 msec
;; SERVER: 192.168.123.140#53(192.168.123.140)
;; WHEN: Wed Feb  8 17:39:18 2012
;; MSG SIZE  rcvd: 112
    
por 08.02.2012 / 18:40

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