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From Mark J Bradakis <>
Subject Re: [users@httpd] CGI scripts generating 503 error
Date Sun, 28 Apr 2019 09:16:16 GMT
Finally figured it out.

The problem was the difference in the Apache CGI modules.  If you use 
prefork MPM ( Multi Processing Modul ) you need to use mod_cgi.  If you 
use worker MPM you need to use mod_cgid.  The reverse combinations do 
not work.  One will actually give you an error and not start the daemon, 
the other combination, which I had, will start the server and give no 
indication whatsoever about any problem, other than the 503 Service 
Unavailable code when trying to execute CGI programs.


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