OpenBSD Component Projects
Despite the small team size and relatively low usage of OpenBSD, the project has successfully spun off widely available portable versions of numerous parts of the base system, including:
- OpenBGPD and OpenOSPFD, which turn personal computers into network routers
- OpenNTPD, a simple alternative to ntp.org's Network Time Protocol (NTP) daemon
- Common Address Redundancy Protocol (CARP), a free alternative to CISCO's patented HSRP/VRRP server redundancy protocols
- OpenSMTPD, an implementation of the Simple Mail Transfer Protocol, currently still considered work in progress
- OpenSSH, a highly regarded implementation of the Secure Shell (ssh) protocol
- PF, a stateful firewall
- spamd, a spam filter designed to collaborate with the PF firewall, which has a greylisting capability
- tmux, a free, secure and maintainable alternative to the GNU Screen terminal multiplexer
- sndio, compact audio and MIDI framework
Some of the subsystems have been integrated into the core system of several other BSD projects, and all are available widely as packages for use in other Unix-like systems, and in some cases in Microsoft Windows.
Read more about this topic: OpenBSD
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