SecuritySpace.com Internet Research Reports( October 2001)

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The Secure Web Server Survey across all domains showed that the Apache webserver had a market share increase of 8.82 percent (from September to August). And Apache webserver went from 61.40 percent of the market in August to 61.78% in September.

The survey also showed that the top five Apache modules are: PHP, mod_ssl, FrontPage, OpenSSl, and perl. The Secure Web Server Survey across all domains showed that the Apache webserver had a market share increase of 8.82 percent (from September to August). And Apache webserver went from 61.40 percent of the market in August to 61.78% in September.

The Market Share Theft and Upgrade Report provides information based on sites that changed the server product type (e.g. Apache to Microsoft) or revision (IIS/4.0 to IIS/5.0) of their web server from the previous month:

Apache:   Gained: 14,512  (0.63% of installed base)
          Lost:   21,231  (0.91% of installed base)

IIS:      Gained: 12,751  (1.24% of installed base)
          Lost:   10,234  (1.00% of installed base)