ISAPI_Rewrite is Apache .htaccess mod_rewrite compatible URL rewriter for Microsoft IIS. It makes possible to move configurations from Apache to IIS and vice versa just by copying .htaccess files. It is used for search engine optimization, to proxy another server's content, stop hotlinking or strengthen server security.

Top features of ISAPI_Rewrite:
- Same syntax and behavior as of Apache mod_rewrite makes it possible to migrate configurations just by copying .htaccess files.
- Regular expressions for flexible and powerful configurations.
- Extremely fast, durable and highly scalable pure C++ code.
- Distributed configurations: global server level, virtual host (web site) level, directory level .htaccess files with real-time monitoring.
- Isolation - user level configuration affects only local user environment making ISAPI_Rewrite an ideal solution for web hosting providers.

Top usage examples:
- Search engine optimization.
- Proxying content of one web server through another web server.
- Prevention of content leeching (direct hotlinking).
- Blocking specific hosts, referrers or annoying robots.
- Content negotiation - serving different files for different language or different browsers.- Load balancing emulation for web cluster.

List of supported Apache .htaccess directives:<VirtualHost><Directory><DirectoryMatch><Files><FilesMatch><Location><LocationMatch>AccessFileNameAllowOverrideErrorLogLogLevelRewriteEngineRewriteRule [C,CO,F,G,L,N,NC,NE,P,PT,QSA,R=,S=,T=]RewriteCond [NC,OR,-d,-f,-s]RewriteBaseRewriteMap [txt:, rnd:, int:]RewriteLogRewriteLogLevelRewriteOptionsRewriteLockYou can find more useful examples in ISAPI_Rewrite documentation and Apache online documentation or script archives. Most of Apache examples can run with ISAPI_Rewrite without modification.

Platforms: WinXP , Windows2000 , Windows2003 , Windows Vista Home Basic , Vista , Windows Vista Home Premium , Windows Vista Business , Windows Vista Enterprise , Windows Vista Ultimate , Windows Vista Home Basic x64 , Windows Vista Home Premium x64 , Windows Vista Business x64 , Windows Vista Enterprise x64 , Windows Vista Ultimate x64

System requirements: Not specified