Data verified Jun 2026
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s7scan is a tool written in Python that scans networks, enumerates Siemens PLCs, and gathers basic information about them, such as PLC firmware and hardware version, network configuration, and security parameters. It uses the S7 protocol to connect to PLCs, specifically performing 'Read SZL' requests to obtain controller information. The tool can identify active PLCs, retrieve details like PLC type, software and hardware versions, protection settings, and network configuration. It supports both TCP/IP and LLC transport protocols and can be built as a stand-alone binary with pyinstaller. s7scan is based on the 'plcscan' utility by Dmitry Efanov (Positive Research).
s7scan FAQ
Common questions about s7scan including features, pricing, alternatives, and user reviews.
s7scan is A tool for scanning networks, enumerating Siemens PLCs, and gathering detailed information about them. It is a Cyber-Physical Security solution designed to help security teams with Network Discovery, Plc, Network Scanning.
s7scan is a free Cyber-Physical Security tool. This makes it accessible for organizations of all sizes, from startups to enterprises. Visit https://github.com/klsecservices/s7scan/ for download and installation instructions.
Popular alternatives to s7scan include:
1.Vantelis Data Acquisition Platform - Agentless OT data acquisition platform for passive asset & traffic visibility. (Commercial)
2.Redinent Deep Asset Intelligence - Cloud-based IoT/OT asset intelligence engine for device profiling and OEM detection. (Commercial)
3.SAM Intelligence - Network device & service visibility platform for ISPs using device fingerprinting. (Commercial)
4.Nozomi Networks Nozomi Smart Polling - Active polling add-on for OT/IoT asset discovery and configuration data (Commercial)
5.Armis Threat Detection and Analysis - OT/IoT asset discovery and threat detection platform for industrial environments (Commercial)
Compare all s7scan alternatives at https://cybersectools.com/alternatives/s7scan
s7scan is for security teams and organizations that need Network Discovery, Plc, Network Scanning. It's particularly suitable for small to medium-sized teams looking for cost-effective solutions. Other Cyber-Physical Security tools can be found at https://cybersectools.com/categories/ot-security
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