The desc explicitly states this is the count of Fwz encrypted packets — packets encrypted using the legacy FWZ protocol without the additional encapsulation layer, a simpler FWZ mode typically used when NAT traversal isn't needed. Seeing traffic in this counter rather than in cpvFwzEncapsEncPkts tells you the legacy FWZ tunnel is operating in its simpler, non-encapsulated mode, mainly relevant to anyone still trying to understand how that old VPN community was configured before eventually retiring it. e.g. cpvFwzEncPkts carrying traffic for a legacy internal FWZ-protected connection that never needed the extra encapsulation layer.