domain-name-system – PowerDNS和一个奇怪的NXDomain

概述首先让我设置场景. 我们以前习惯使用Bind9,但是放弃它以支持PowerDNS,因为坦率地说,Bind很糟糕. 我们的DNS主服务器中有一个“主要”区域. london.wibblesplat.com 还有其他区域,oob.london.wibblesplat.com 非oob区域中的大多数地址在192.168.0.0/16范围内. dns-1服务器的IP为192.168.123.140. (我 首先让我设置场景.

我们以前习惯使用Bind9,但是放弃它以支持PowerDNS,因为坦率地说,Bind很糟糕.

我们的DNS主服务器中有一个“主要”区域. london.wibblesplat.com
还有其他区域,oob.london.wibblesplat.com

非oob区域中的大多数地址在192.168.0.0/16范围内. dns-1服务器的IP为192.168.123.140. (我不确定这是否相关).

我想在172.16.254.0/24范围内的oob.london.wibblesplat.com区域添加一些带外(oob)访问IP

这就是驱动powerdns的数据库中的内容.

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)

这就是挖说的.

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

为什么PowerDNS没有提供记录？它存在.查询应该没问题.如果A记录不在服务器可访问的子网中,是否有一些奇怪的区域没有被提供？ (我看不出这是正确的,如果我想(无论出于何种原因)重新发布8.8.8.8的A记录或其他什么).

有什么想法吗？

编辑：

情节变浓.
出于兴趣,我修改了旧记录,并添加了一些新的,更短的记录.

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 |       |

现在..
tom.oconnor@charcoal-black：〜$dig rc1sw1搜索

; <<>> 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

它有效.

似乎Powerdns可能不喜欢这么多 – 名字中的字符.我会牢记这一点,继续下去.不过,答案可能还不错.

好吧,这是它不喜欢的-A1.

看看这个.

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 |       |

和

tom.oconnor@charcoal-black:~$dig bunt +search; <<>> DiG 9.7.0-P1 <<>> bunt +search;; global options: +cmd;; Got answer:;; ->>header<<- opcode: query,ID: 34027;; flags: qr aa rd ra; query: 1,ADDITIONAL: 0;; QUESTION SECTION:;bunt.london.wibblesplat.com.   IN  A;; ANSWER SECTION:bunt.london.wibblesplat.com. 120    IN  A   127.0.0.1;; query time: 1 msec;; SERVER: 192.168.123.140#53(192.168.123.140);; WHEN: Wed Feb  8 17:27:15 2012;; MSG SIZE  rcvd: 59tom.oconnor@charcoal-black:~$dig BUNT +search; <<>> DiG 9.7.0-P1 <<>> BUNT +search;; global options: +cmd;; Got answer:;; ->>header<<- opcode: query,ID: 60125;; flags: qr aa rd ra; query: 1,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: 59tom.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,ID: 22009;; flags: qr rd ra; query: 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

解决方法 至少在默认的PowerDNS表模式下,Postgresql区分大小写. PowerDNS会降低所有查询的范围.因此,请确保始终小写您的名字. 总结

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