PsygNAT is a free
router tool for i386 which boots off
on a single floppy. It is based on the
kernel and therefore, uses
as its native ruleset
PsygNAT contains the necessary tools in configuring a simple NAT router,
a stateful (and transparent) firewall, or a bandwidth limiter via
It supports both static and dynamic client setup. It also includes
an emacs-like text editor, which can be used to write firewall and network address translation
PsygNAT is free for download
by anyone, under the terms of an
license and other
licenses found on the OpenBSD
Supported PCI ethernet devices
- DC21X4X-based ethernet cards
- Intel EtherExpress 10/100 ethernet cards
- 3C9xx ethernet cards
- 3CR990 ethernet cards
- NE2000 compatible ethernet cards
- VIA Rhine ethernet
- SiS 900/7016 ethernet cards
- Get psygnat-0.4d.img.
MD5 (psygnat-0.4d.img) = 3726f824037b2281e236e53a268bbae8
SHA1 (psygnat-0.4d.img) = 0f9bb07dcefd151a578caf0ab669f75316f92586
RMD160 (psygnat-0.4d.img) = d297137abb9beacc2bf3dd67df37eb97600af4ee
- Get the config file.
- Burn the image file to a floppy disk.
Using dd (for Unix-like OS)
dd if=/path/to/psygnat-0.4d.img of=/path/to/floppy bs=32
Example: dd if=psygnat-0.4d.img of=/dev/fd0c bs=32
(for Windows NT,2000,XP)
ntrw \path\to\psygnat-0.4d.img floppy drive:
Example: ntrw c:\psygnat-0.4d.img a:
- Boot on the floppy and configure :-)
Please read the pf manual for more information.
- more clean ups and fixes
- some docs (hey teejay! :-)
- The changes to the OpenBSD sources that are applied to PsygNAT are
released under the terms of an ISC-like license.
- All other licenses, copyright holders, and credits remain the same and can
be found on the file sources
The image used in this page are copyrighted by
by Theo de Raadt,
or by developers or members of the OpenBSD group.
The name PsygNAT came from my IRC
nick: 'psygnosis' and the acronym 'NAT'. Ugh! I just can't think of a good
name. The word 'psygnosis' used in this site is not in anyway related to
Sony Computer Entertainment.