OpenBSD is a free, multi-platform 4.4BSD-based UNIX-like operating system. Its priorities are portability, standardization, correctness, proactive security and integrated cryptography, thus making it one of the most secure and reliable OSes around.
It's an OpenBSD world...
All your corporate servers running OpenBSD... Wouldn't it be cool? In the following documents, we will go through implementing the most common network services on OpenBSD.
Redundant firewalls with OpenBSD, CARP and pfsync
Installing and configuring high-availability firewalls using OpenBSD's free tools and protocols.
OpenBSD as a mail server
Setting up a full-featured, secure mail server using OpenBSD, Postfix, MySQL, Courier-IMAP, Cyrus SASL, Amavisd-new, SpamAssassin, ClamAV and SquirrelMail.
The Squid and the Blowfish
OpenBSD as a web proxy server. Featuring Squid, SquidGuard, SquidClamav and AdZapper
OpenBSD as a domain name server
Step by step configuration of the Bind name server on OpenBSD, including dynamic update, TSIG and NAT handling.
Network monitoring with Nagios and OpenBSD
Keeping tabs on your network with Nagios and OpenBSD. Also featuring NRPE, NSCA and NagVis.
OpenBSD as a Primary Domain Controller
Turning OpenBSD into a full-featured Primary Domain Controller with Samba, OpenLDAP, the smbldap-tools, CUPS and Samba-vscan (not to mention Bind and ClamAV).
Boxing Puffy...
OpenBSD bringing the best out of your embedded systems.
Embedded OpenBSD
Installing your favourite OS on embedded systems.
Building VPNs on OpenBSD
A practical comparison of the most popular VPN technologies available on OpenBSD: IPsec, OpenVPN and OpenSSH.