system environment/daemons

• apf - APF - Advanced Policy Firewall
• fail2ban - Ban IPs that make too many password failures
• fedora-ds - Red Hat Directory, Administration, and Console Suite
• havp - HTTP anti-virus proxy filter
• maildrop - Mail delivery agent with filtering abilities
• mod_cband - Bandwidth limiting for virtual hosts
• mod_fcgid - FastCGI interface module for Apache 2
• mod_hostinglimits - Apache module
• mod_qos - Quality of service module for Apache
• mod_rpaf - mod_rpaf
• mod_ruid2 - Run all httpd process under user's access right.
• mod_security - Security module for the Apache HTTP Server
• mod_sed - mod_sed can be used to filter input/output data using sed commands.
• mod_suphp - An apache2 module for executing PHP scripts with the permissions of their owners
• nepenthes - A low interaction honeypot
• p3scan - Virus scanning transparent proxy server for POP3 POP3S SMTP
• rbldnsd - Small, fast daemon to serve DNSBLs
• rinetd - TCP redirection server
• unrealircd - UnrealIRCd is an IRC server.
• xl2tpd - Layer 2 Tunnelling Protocol Daemon (RFC 2661)