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Groups > comp.os.linux.networking > #1502

Re: "Timeout" DNS IP to name resolution

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On Sat, 23 Jun 2012 17:56:22 +0000, buck wrote:

> I run a rather busy Apache web server with HostnameLookups On because
> management wants it so.

Tell management that if they really want this, they need something like  
10 times the amount of webservers to handle the same amount of requests. 
And even then, there are no guarentees, so 20 times the amount of 
webservers would be even better. If they are willing to invest this kind 
of money fine. If not, point them to the alternatives given in this 
thread.

rDNS requests can and will time out for various reasons, legitimate or 
not. It's easier to resolve afterwards. This may mean that you see some 
rDNSses that are not the same as at the moment the request came in to 
your webserver, but hey, rDNS is informative anyhow. People can set it up 
to whatever they like, so it cannot be relied on anyhow.

Another idea would be to logrotate-post-process the logs to do the rDNS 
then. Maybe that's acceptable?

M4

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"Timeout" DNS IP to name resolution buck <buck@private.mil> - 2012-06-23 17:56 +0000
  Re: "Timeout" DNS IP to name resolution Chris Davies <chris-usenet@roaima.co.uk> - 2012-06-23 22:29 +0100
    Re: "Timeout" DNS IP to name resolution buck <buck@private.mil> - 2012-06-24 01:05 +0000
      Re: "Timeout" DNS IP to name resolution Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-06-24 11:52 +0200
      Re: "Timeout" DNS IP to name resolution Chris Davies <chris-usenet@roaima.co.uk> - 2012-06-24 12:15 +0100
        Re: "Timeout" DNS IP to name resolution Moe Trin <ibuprofin@painkiller.example.tld.invalid> - 2012-06-24 11:09 -0500
          Re: "Timeout" DNS IP to name resolution buck <buck@private.mil> - 2012-06-24 19:50 +0000
            Re: "Timeout" DNS IP to name resolution Moe Trin <ibuprofin@painkiller.example.tld.invalid> - 2012-06-24 19:12 -0500
              Re: "Timeout" DNS IP to name resolution J G Miller <miller@yoyo.ORG> - 2012-06-25 10:22 +0000
  Re: "Timeout" DNS IP to name resolution MJ <me@invalid.org> - 2012-06-27 07:44 +0000
    Re: "Timeout" DNS IP to name resolution buck <buck@private.mil> - 2012-06-29 17:00 +0000
      Re: "Timeout" DNS IP to name resolution Joe Beanfish <joebeanfish@nospam.duh> - 2012-06-29 15:43 -0400
        Re: "Timeout" DNS IP to name resolution buck <buck@private.mil> - 2012-06-30 20:04 +0000
  Re: "Timeout" DNS IP to name resolution Martijn Lievaart <m@rtij.nl.invlalid> - 2012-06-30 00:58 +0200

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