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Message from discussion Opinion: Should web clients be required to have DNS PTR records?
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Eli the Bearded  
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 More options Jul 30 2011, 1:08 pm
Newsgroups: alt.apache.configuration, alt.culture.www, comp.infosystems.www.misc, news.admin.net-abuse.misc
From: Eli the Bearded <*...@eli.users.panix.com>
Date: Sat, 30 Jul 2011 17:08:11 +0000 (UTC)
Local: Sat, Jul 30 2011 1:08 pm
Subject: Re: Opinion: Should web clients be required to have DNS PTR records?
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In comp.infosystems.www.misc,

D. Stussy <repl...@newsgroups.kd6lvw.ampr.org> wrote:
> "Eli the Bearded" <*...@eli.users.panix.com> wrote:
>> If it's your server, you can do what you want. I think that's foolish.

My opinion has not changed.

> 1)  I already have host name lookups enabled for other reasons.  I do not
> see a signficant slowdown in that all non-cgi queries get satisfied within
> 1 second.

Either you are not very precise in measuring the time-to-serve, or you
are a lot more forgiving of slowness than I am. Possibly both.

As an experiment, take all the IP addresses from a day of your logs
and on a different network, just do lookups on all of them and time
how long it takes. That's how much you are slowing down your webserver
every day.

I haven't done that in years (now I just do off-line geo-location on
the IPs) but it used to be about two hours a day for my servers. It
will vary a lot with the sorts of traffic you get. A lot from one site?
You get a nice caching benefit. Much of it from slow third-world ISPs?
You take a big hit on the distant DNS.

> 2)  I don't use the default log format.  My logs contain both the client
> host name and address fields.

No problem for you on that front, then.

Elijah
------
thinks D. Stussy has made up his mind and just wants others to follow


 
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