OPNsense® version 21.1 "Marvelous Meerkat" of the open source firewall released Share Article The latest OPNsense 21.1 release is packed with improvements, new and updated plugins as well as new drivers to support the upcoming official certified OPNsense hardware. Secure Your Network with ease. OPNsense 21.1 "Marvelous Meerkat" New features include live traffic graphs as well support for multiple categories in both firewall rules as well as the NAT rules. MIDDELHARNIS, the Netherlands (PRWEB) January 28, 2021 Deciso® announces the immediate availability of OPNsense® 21.1 named “Marvelous Meerkat”. The latest release is packed with improvements, new and updated plugins as well as new drivers to support the upcoming official certified OPNsense hardware.