Dip obsługuje połączenia potrzebne do zestawiania linków IP, takich jak SLIP lub PPP. Obsługuje zarówno połączenia przychodzące jak i wychodzące, używając haseł dla połączeń przychodzących.
Netleak is a collection of small perlscripts that detects connectivity between network segments. It is mostly useful to detect "leaks" in large organizations that have private network segments physically separated from the Internet.
Pam_chroot is a Linux-PAM module that allows a user to be chrooted in auth, account, or session. The pam_chroot configuration employs a flexible syntax which allows for a user to be selectively chrooted based upon username or group membership.
Protoscope is a utility that aids Web developers by revealing the HTTP communication in their own applications. It is a nice tool for Web developers who want to "look under the hood" as they develop.
Jumpgate is a TCP connection forwarder that provides many enhancements and improvements over the existing programs that do the same thing. Only tested on OpenBSD, but should run without problems on any Unix-like system.