A sterilizer-filler nozzle assembly for an aseptic packaging machine, which assembly comprises: - a forming section that has an outer wall, a proximal and a distal end, which outer wall is designed to form a packaging tube out of a web-shaped packaging material around the outer wall while the packaging tube moves downstream and while the packaging tube gets sealed along a longitudinal edge; - a product supply duct that • extends at least partly through the forming section; • has a product inlet connector which lies upstream of the distal end of the forming section; and • has a product outlet portion which lies downstream of the distal end of the forming section; - a sterilization medium supply duct that • extends at least partly through the forming section; • has a sterilization medium inlet connector which lies upstream of the distal end of the forming section; and • has a sterilization medium outlet portion which lies between the distal end of the forming section and the product outlet portion; - an exhaust duct that • extends at least partly through the forming section; • has an exhaust outlet connector which lies upstream of the distal end of the forming section; and • has an exhaust inlet portion which lies between the distal end of the forming section and the product outlet portion; characterized by further comprising: - a gas supply duct that • extends at least partly through the forming section; • has a gas inlet connector which lies upstream of the distal end of the forming section; and • has a gas outlet portion which lies between the sterilization medium outlet portion and the product outlet portion. - a forming section that has an outer wall, a proximal and a distal end, which outer wall is designed to form a packaging tube out of a web-shaped packaging material around the outer wall while the packaging tube moves downstream and while the packaging tube gets sealed along a longitudinal edge; - a product supply duct that • extends at least partly through the forming section; • has a product inlet connector which lies upstream of the distal end of the forming section; and • has a product outlet portion which lies downstream of the distal end of the forming section; • extends at least partly through the forming section; • has a product inlet connector which lies upstream of the distal end of the forming section; and • has a product outlet portion which lies downstream of the distal end of the forming section; - a sterilization medium supply duct that • extends at least partly through the forming section; • has a sterilization medium inlet connector which lies upstream of the distal end of the forming section; and • has a sterilization medium outlet portion which lies between the distal end of the forming section and the product outlet portion; • extends at least partly through the forming section; • has a sterilization medium inlet connector which lies upstream of the distal end of the forming section; and • has a sterilization medium outlet portion which lies between the distal end of the forming section and the product outlet portion; - an exhaust duct that • extends at least partly through the forming section; • has an exhaust outlet connector which lies upstream of the distal end of the forming section; and • has an exhaust inlet portion which lies between the distal end of the forming section and the product outlet portion; • extends at least partly through the forming section; • has an exhaust outlet connector which lies upstream of the distal end of the forming section; and • has an exhaust inlet portion which lies between the distal end of the forming section and the product outlet portion; - a gas supply duct that • extends at least partly through the forming section; • has a gas inlet connector which lies upstream of the distal end of the forming section; and • has a gas outlet portion which lies between the sterilization medium outlet portion and the product outlet portion. • extends at least partly through the forming section; • has a gas inlet connector which lies upstream of the distal end of the forming section; and • has a gas outlet portion which lies between the sterilization medium outlet portion and the product outlet portion.