обратный резолвер, cname

[Igor Sysoev]

On Fri, Jan 30, 2009 at 06:53:15PM +0600, Artem Bokhan wrote:

> Igor Sysoev пишет:
> >On Fri, Jan 30, 2009 at 03:06:10PM +0600, Artem Bokhan wrote:
> >
> >  
> >>Похоже на проблемы в обратном резолвере
> >>
> >>
> >>2009/01/30 14:57:25 [error] 5545#0: *15448 74.72-79.???X ! could not be 
> >>resolved (3: Host not found) while in resolving client hostname, client: 
> >>200.149.10.74, server: 0.0.0.0:33333
> >>    
> >
> >Нет, дело не в cname. Патч прилагается, использовать вместе с предыдущим.
> 
> Следующие сообщения тоже вызывают подозрение:
> 
> 2009/01/30 18:22:01 [alert] 21910#0: unexpected response for 89.37.173.164
> 2009/01/30 18:22:01 [alert] 21910#0: unexpected response for 89.37.173.164
> 2009/01/30 18:22:06 [alert] 21910#0: unexpected response for 77.120.128.76
> 2009/01/30 18:22:06 [alert] 21910#0: unexpected response for 77.120.128.76
> 2009/01/30 18:22:06 [alert] 21910#0: unexpected response for 77.120.128.76
> 2009/01/30 18:22:14 [alert] 21910#0: unexpected response for 212.220.81.177
> 2009/01/30 18:22:14 [alert] 21910#0: unexpected response for 212.220.81.177
> 2009/01/30 18:22:14 [alert] 21910#0: unexpected response for 212.220.81.177
> 2009/01/30 18:26:10 [alert] 32489#0: unexpected response for 77.120.128.57
> 2009/01/30 18:26:10 [alert] 32489#0: unexpected response for 77.120.128.57
> 2009/01/30 18:27:25 [alert] 32489#0: unexpected response for 91.201.240.171
> 2009/01/30 18:27:42 [alert] 32489#0: unexpected response for 77.120.128.28
> 2009/01/30 18:27:42 [alert] 32489#0: unexpected response for 77.120.128.28
> 2009/01/30 18:27:42 [alert] 32489#0: unexpected response for 77.120.128.28
> 2009/01/30 18:27:42 [alert] 32489#0: unexpected response for 77.120.128.28
> 2009/01/30 18:27:48 [alert] 32489#0: unexpected response for 
> ns.km23012.keymachine.de
> 2009/01/30 18:27:48 [alert] 32489#0: unexpected response for 
> ns.km23012.keymachine.de
> 2009/01/30 18:27:48 [alert] 32489#0: unexpected response for 
> ns.km23012.keymachine.de
> 2009/01/30 18:27:48 [alert] 32489#0: unexpected response for 
> ns.km23012.keymachine.de
> 2009/01/30 18:27:48 [alert] 32489#0: unexpected response for 
> ns.km23012.keymachine.de
> 2009/01/30 18:27:48 [alert] 32489#0: unexpected response for 
> ns.km23012.keymachine.de
> 2009/01/30 18:27:57 [alert] 32489#0: unexpected response for 89.34.124.59
> 2009/01/30 18:27:57 [alert] 32489#0: unexpected response for 89.34.124.59
> 2009/01/30 18:27:57 [alert] 32489#0: unexpected response for 89.34.124.59
> 2009/01/30 18:27:57 [alert] 32489#0: unexpected response for 89.34.124.59
> 2009/01/30 18:27:57 [alert] 32489#0: unexpected response for 89.34.124.59
> 2009/01/30 18:28:59 [alert] 30598#0: unexpected response for 
> 43.subnet0.22.49.65.in-addr.arpa
> 2009/01/30 18:28:59 [alert] 30598#0: unexpected response for 
> 43.subnet0.22.49.65.in-addr.arpa
> 2009/01/30 18:28:59 [alert] 30598#0: unexpected response for 
> 43.subnet0.22.49.65.in-addr.arpa
> 2009/01/30 18:28:59 [alert] 30598#0: unexpected response for 
> 43.subnet0.22.49.65.in-addr.arpa
> 2009/01/30 18:28:59 [alert] 30598#0: unexpected response for 
> 43.subnet0.22.49.65.in-addr.arpa
> 2009/01/30 18:29:03 [alert] 30598#0: unexpected response for 62.73.68.253
> 2009/01/30 18:29:03 [alert] 30598#0: unexpected response for 62.73.68.253
> 2009/01/30 18:29:03 [alert] 30598#0: unexpected response for 62.73.68.253
> 2009/01/30 18:29:03 [alert] 30598#0: unexpected response for 62.73.68.253
> 2009/01/30 18:29:03 [alert] 30598#0: unexpected response for 62.73.68.253
> 2009/01/30 18:37:44 [alert] 20587#0: unexpected response for 124.227.213.130
> 2009/01/30 18:42:30 [alert] 27148#0: unexpected response for 77.77.74.136
> 2009/01/30 18:42:30 [alert] 27148#0: unexpected response for 77.77.74.136
> 2009/01/30 18:42:30 [alert] 27148#0: unexpected response for 77.77.74.136
> 2009/01/30 18:42:30 [alert] 27148#0: unexpected response for 77.77.74.136
> 2009/01/30 18:42:30 [alert] 27148#0: unexpected response for 77.77.74.136

Обычно это выдаётся в такой ситуации:

1) DNS-запрос ушёл,
2) резолвинг был отменён по таймауту,
3) пришёл ответ, но информции по запросу уже нет, поэтому он unexpected.

Возможно, его имеет смысл перенести на уровень info или notice.


-- 
Игорь Сысоев
http://sysoev.ru