From Soekris Info Wiki

Contents 1 Ready-made distributions known to work on Soekris hardware: 1.1 Linux-based 1.1.1 Debian 1.1.2 Busybox / UCLibC 1.1.3 Telephony 1.1.4 General Purpose 1.1.5 Commercial 1.2 *BSD-based 1.2.1 NetBSD 1.2.1.1 CUWiN 1.2.2 FreeBSD 1.2.2.1 m0n0wall 1.2.2.2 pfSense

Ready-made distributions known to work on Soekris hardware:

Linux-based

Debian

• Installing_Debian_Linux_(4.0r1_Etch)

Busybox / UCLibC

• OpenWrtKamikazeSoekris port
• X-Wrt

Telephony

• Astlinux
• Askozia

General Purpose

• Pyramid
• Voyage
• Zeroshell

Commercial

• Locustworld
• StarOS
• Microtik

*BSD-based

NetBSD

CUWiN

• Download

FreeBSD

Note: FreeBSD 6.3 based dist requires comBIOS 1.32i on the net5501.

m0n0wall

• Stable (1.231)
• Beta (1.3b)

1.3b will run on a 4501-30, but can exceed 64MB if numerous features are in use.

pfSense

• Downloads

Minimum memory requirements are 128MB, but has been known to run on 64-MB platforms (4501-30) Linux and FreeBSD Distros for Soekris equipment.