Rewritten November 2025
Although virtually all modern web servers support CGI, and most support FastCGI as well, the most popular servers are probably Apache, IIS (Windows only) and NginX. In all cases, it will probably be necessary to adjust the web server configuration options to deal with CGI and or FastCGI as required for your environment. You'll probably have to consult the web server documentation and/or the Internet for help on that, but for what it's worth, here is an example of changes that might be made to the Apache configuration under Windows (in http.conf) :
For CGI:
LoadModule cgi_module modules/mod_cgi.so
...
<IfModule alias_module>
ScriptAlias /cgi-bin/ "c:/Apache24/cgi-bin/"
</IfModule>
...
<Directory "c:/Apache24/cgi-bin">
SetHandler cgi-script
AllowOverride None
Options +ExecCGI
Require all granted
</Directory>
For FastCGI:
LoadModule fcgid_module modules/mod_fcgid.so
...
<IfModule alias_module>
ScriptAlias /fcgi-bin/ "c:/Apache24/fcgi-bin/"
</IfModule>
...
<IfModule fcgid_module>
FcgidMaxRequestsPerProcess 50000
FcgidMinProcessesPerClass 1
FcgidMaxProcesses 2
FcgidBusyTimeout 60
FcgidBusyScanInterval 5
FcgidIOTimeout 60
FcgidIdleTimeout 0
FcgidIdleScanInterval 100
FcgidProcessLifeTime 0
<Directory "c:/Apache24/fcgi-bin">
SetHandler fcgid-script
AllowOverride None
Options +ExecCGI
Require all granted
</Directory>
</IfModule>
