OpenBSD Journal

PsygNAT - free firewall and NAT router tool on a floppy!

Contributed by sean on from the openbsd on the most unreliable of mediums dept.

Some Anonymous Coward writes:
PsygNAT is a free firewall and NAT router tool for i386 which boots off on a single floppy.
It is based on the OpenBSD kernel and therefore, uses pf as its native ruleset management.

PsygNAT contains the necessary tools in configuring a simple NAT router, a stateful (and
transparent) firewall, or a bandwidth limiter via ALTQ. It supports both static and
dynamic client setup. It also includes mg, an emacs-like text editor, which can be used
to write firewall and network address translation rules.
PsygNAT home is here.

(Comments are closed)

  1. By johannes ( on

    Sounds nice.
    Some information about what version of OpenBSD is used would be cool.


    1. By jason ( on

      OpenBSD 3.5-stable I think.

    2. By Irvin ( on

      it is based on OpenBSD 3.5-stable.

  2. By Anonymous Coward ( on

    just burned it. i think psygnat-setup script is based on the openbsd installer and it works perfectly fit. can this image be burned onto a cd?

    1. By grey ( on has instructions on how to make a bootable .iso using a bootable floppy image and mkisofs, it should be adaptable to your situation.

  3. By Daniel Tams ( on

    Yes, like fdgw, just based on OpenBSD. I was looking for this some time ago. Gotta check it out!

  4. By Matt Van Mater ( on

    I noticed in the config file on his website he has a NO_PROPOLICE option defined. Why is that? Is that because of performance, floppy disk space contrataints, or something else? check it out un the url pasted above.

    1. By Anonymous Coward ( on

      its due to space constraints, it is only limited to 1.44mb (both kernel and userland)


Copyright © - Daniel Hartmeier. All rights reserved. Articles and comments are copyright their respective authors, submission implies license to publish on this web site. Contents of the archive prior to as well as images and HTML templates were copied from the fabulous original with Jose's and Jim's kind permission. This journal runs as CGI with httpd(8) on OpenBSD, the source code is BSD licensed. undeadly \Un*dead"ly\, a. Not subject to death; immortal. [Obs.]