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m0n0wall logo
Developer Manuel Kasper
OS family FreeBSD (8.4-RELEASE)
Working state Discontinued / February 15, 2015[1]
Source model Open source
Latest release 1.8.1 / January 15, 2014 (2014-01-15)
Kernel type Monolithic kernel
License BSD
Official website m0n0.ch/wall/

m0n0wall was an embedded firewall distribution of FreeBSD, one of the BSD operating system descendants. It provides a small image which can be put on Compact Flash cards as well as on CD-ROMs and hard disks. It runs on a number of embedded platforms and generic PCs. The PC version can be run with just a Live CD and a floppy disk to store configuration data, or on a single Compact Flash card (with an IDE adapter). This eliminates the need for a hard drive, which reduces noise and heat levels.

On February 15, 2015 Manuel Kasper announced the "m0n0wall project has officially ended. No development will be done anymore, and there will be no further releases," encouraging "all current m0n0wall users to check out OPNsense and contribute if they can."[1][2] PfSense was forked from the m0n0wall project in 2004 and OPNsense was forked from Pfsense in 2015.


m0n0wall provides for a web-based configuration and uses PHP exclusively for the GUI and bootup configuration. Additionally, it adopts a single XML file for configuration parameters.

Some functions of m0n0wall are:


m0n0wall is installed on embedded hardware designed and manufactured by some companies.[citation needed]


Similar hardware requirements
  • t1n1wall : 2015 fork of m0n0wall after it was discontinued.
  • SmallWall: Another 2015 fork of m0n0wall after its end-of-life.
  • m0n0wall mod: Original m0n0wall with additional features (DHCP+PPTP, DHCP+PPPoE, static+PPPoE, L2TP, WAN eth interface), no activities since 2013.
Extended hardware requirements
  • OPNsense: Successor to m0n0wall, forked from pfSense in 2015[3][4]
  • pfSense: forked from the m0n0wall project in 2004, first released in 2006[5]
Other usages (not a firewall)

See also[edit]


  1. ^ a b Kasper, Manuel (February 15, 2015). "m0n0wall - End of the m0n0wall project".
  2. ^ Chirgwin, Richard (February 16, 2015). "M0n0wall comes tumbling down as dev throws in the trowel". The Register.
  3. ^ Yegulalp, Serdar (August 16, 2016). "Review: 6 slick open source routers". Infoworld via CIO.
  4. ^ Chirgwin, Richard (February 16, 2015). "M0n0wall comes tumbling down as dev throws in the trowel". The Register.
  5. ^ Fields, Robert (October 28, 2016). "Happy 10th Anniversary to pfSense Open Source Software". Netgate Blog.

External links[edit]