I-OPNsense iwumthombo ovulekile, i-FreeBSD-based firewall kanye nesofthiwe yomzila eyakhiwe yi-Deciso, inkampani yaseNetherlands eyenza i-hardware futhi ithengise amaphakheji okusekela e-OPNsense. Kuyimfoloko ye-pfSense, yona eyashintshwa isuka ku-m0n0wall eyakhelwe ku-FreeBSD. Yethulwe ngoJanuwari 2015.