= Useful server applications = || Apache || web server || || denyhosts || abusive addresses to hosts.deny || || dirvish || disk-to-disk backup || || kwiki || wiki community web pages || || Mailman || Mailing List || || Mindterm || web-based SSH terminal in Java || || OpenSSH || Secure Shell || || OpenSSL || Secure Sockets Layer || || OpenVPN || Virtual private network || || Osiris || Host Integrity monitoring || || Postfix || mail server || || Postgrey || grey listing for postfix || || Subversion || Software version control || || viewCVS || Web viewer for Subversion ||