防火墙 Traditional form: 防火牆 Pinyin (reading): fánghuǒqiáng Definitions: firewall CL:堵 (dǔ) Characters: 防 - to protect, to defend, to guard against 火 - fire, flame; to burn; anger, rage 墙 - wall Traditional characters: 防 - to protect, to defend, to guard against 火 - fire, flame; to burn; anger, rage 牆 - wall