A watan Yuni 2001, jawo da damuwa a kan Darren Reed ta modification na IPFilter ta lasisi wording, a tsarin lasisi duba na OpenBSD mashigai da source itatuwa da aka gudanar. A fiye da ɗari fayiloli a ko'ina cikin tsarin da aka samu ya zama unlicensed, ambiguously lasisi ko amfani a cikin sharuddan da aiki Code. Don tabbatar da cewa duk dacewa lasisi aka yadda ya kamata bi, an yi kokarin "kiyaye ruhun na asali Berkeley Unix hakkin mallaka", wanda ya yarda da "relatively unencumbered Unix source rarraba". Yadu amfani da Apache License da GNU Janar Public License an dauke overly restrictive. A watan Yuni 2001, jawo da damuwa a kan Darren Reed ta gyara na IPFilter ta lasisi wording, a tsarin lasisi duba na OpenBSD mashigai da source itatuwa da aka gudanar.
Berkeley Unix