Safesquid is an antivirus and content filtering proxy server. It has many advanced features like URL blacklists, bandwidth management, regular expression substitution on Website content and requested URL_s, ICP and CARP support to interoperate with other proxy servers, configuration synchronization to ease management of proxy servers in a cluster, ICAP support to use third-party content adaptation software, image and link prefetching, HTTP and FTP content caching, NTLM and Basic authentication, and an intutive Web interface to configure the proxy server.