Overland Park-based FireMon, a security intelligence software vendor, has received a majority stake investment from Insight Venture Partners. Insight Venture is a New York-based venture capital firm with several other security and technology markets in its portfolio. FireMon started out as a professional services tool developed by FishNet (also based in Overland Park) to automate the analysis of firewall rulesets. The FireMon product continued development until became so robust it was spun off as a separate company in 2004. FireMon has about 100 employees, and has sales divisions in Europe, China, India and the Middle East and Southeast Asia. The terms of the acquisition were not disclosed.