FaPro (Fake Protocol Server) is a free, cross-platform, single-file network protocol server simulator designed for deception and honeypot operations. The tool enables security professionals to easily start or stop multiple network services that simulate real protocols with deep interaction capabilities. FaPro supports over 50 protocols including RDP, SSH, HTTP, MySQL, Redis, SMTP, FTP, DNS, SMB, Telnet, VNC, MQTT, Modbus, S7, IEC 104, Elasticsearch, MongoDB, PostgreSQL, Oracle TNS, MSSQL, LDAP, and many industrial control system protocols like SCADA, DNP3, BACnet, and OMRON. The tool operates in two modes: local machine and virtual network. It features advanced capabilities including TCP SYN logging, ICMP ping logging, UDP packet logging, JA3 SSL fingerprinting, IP limiting, and TCP traffic forwarding. Protocol simulations include realistic interactions such as RDP with CredSSP NTLMv2 NLA authentication and configurable login images, SSH with fake terminal commands and user authentication, IMAP/SMTP with user login support, and MySQL with SQL query interaction. FaPro is particularly useful for threat detection, threat hunting, and creating deceptive network environments to identify and analyze attacker behavior.