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From Marc Perkel <>
Subject Re: [users@httpd] Conditions based on reverse lookup
Date Thu, 10 Aug 2006 21:12:12 GMT

Joshua Slive wrote:
> On 8/10/06, Marc Perkel <> wrote:
>> I'm running Apache 2.2. Here's what I want to do. I want to restrict
>> access based on a failed reverse host lookup. For example, if the IP of
>> the client fails revers lookup I want then to not be able to post.
>> Can that be done?
> There's probably some module that does this, but a quick hack would be
> HostnameLookups On
> SetEnvIf Remote_Host [0-9]$ noname=1
> <Location />
> Order deny,allow
> Deny from env=noname
> </Location>
> This *will* slow down your server.
> Joshua.

I'm already looking up host names and it seems fast enough.

How would I do this so that only POST is denied. I'm trying to reduce 
comment spam on blogs and BBS boards.

Thanks in advance.

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