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m0n0wall logo
DeveloperManuel Kasper
OS familyFreeBSD (8.4-RELEASE)
Working stateDiscontinued / February 15, 2015[1]
Source modelOpen source
Latest release1.8.1 / January 15, 2014 (2014-01-15)
Kernel typeMonolithic kernel
Official websitem0n0.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]


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:


PC Engines ALIX

m0n0wall is installed on embedded hardware designed and manufactured by some companies.


Similar hardware requirements
  • t1n1wall: 2015 fork of m0n0wall after it was discontinued.
  • SmallWall: Another 2015 fork of m0n0wall after its end-of-life, no activity since 2016.
  • m0n0wall mod: Original m0n0wall with additional features (DHCP+PPTP, DHCP+PPPoE, static+PPPoE, L2TP, WAN eth interface), no activity since 2013.
Extended hardware requirements
  • OPNsense: Forked from pfSense in 2015.[3]
  • pfSense: Forked from the m0n0wall project in 2004, first released in 2006.[4]
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. ^ Fields, Robert (October 28, 2016). "Happy 10th Anniversary to pfSense Open Source Software". Netgate Blog.

External links[edit]