Apache HTTP Server (Apache for short) is an open source web server software from the Apache Software Foundation that can run on most computer operating systems. Due to its cross-platform and security, it is widely used and is one of the most popular web server software.
# It is fast, reliable and can be extended through a simple API to compile interpreters such as Perl/Python into the server.
Apache supports many features, most of which are implemented through compiled modules. These features range from server-side programming language support to authentication schemes. Some common language interfaces support Perl, Python, Tcl, and PHP.
Popular authentication modules include mod_access, mod_auth and mod_digest. Other examples are SSL and TLS support (mod_ssl), the proxy module, the useful URL rewriting (implemented by mod_rewrite), custom log files (mod_log_config), and filtering support (mod_include and mod_ext_filter). Apache logs can be analyzed through a web browser using the free script AWStats or Visitors.
The core of Apache 2.x version has made important enhancements on top of Apache 1.x version. This includes: multi-threading, better support for non-UNIX platforms (such as Windows), MPM, new Apache API, and IPv6 support.
For more Apache related knowledge, please visit the Apache usage tutorial column!
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