[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"workflow-asset-68ab0576":3,"seo:featured-workflow:68ab0576-4d55-11f1-9bc6-00163e2b0d79:fr":84,"workflow-related-asset-68ab0576-68ab0576-4d55-11f1-9bc6-00163e2b0d79":85},{"id":4,"uuid":5,"slug":6,"title":7,"description":8,"author_id":9,"author_name":10,"author_avatar":11,"token_estimate":12,"time_saved":12,"model_used":11,"fork_count":12,"vote_count":12,"view_count":13,"parent_id":12,"parent_uuid":11,"lang_type":14,"steps":15,"tags":22,"has_voted":28,"visibility":18,"share_token":11,"is_featured":12,"content_hash":29,"asset_kind":30,"target_tools":31,"install_mode":35,"entrypoint":19,"risk_profile":36,"dependencies":38,"verification":43,"agent_metadata":46,"agent_fit":59,"trust":71,"provenance":80,"created_at":82,"updated_at":83},3080,"68ab0576-4d55-11f1-9bc6-00163e2b0d79","asset-68ab0576","ClamAV — Open Source Antivirus Engine for Servers and Mail Gateways","ClamAV is a free, open-source antivirus engine maintained by Cisco Talos. It provides command-line scanning, a daemon for on-access and batch scanning, and automatic signature updates for detecting malware.","8a911193-3180-11f1-9bc6-00163e2b0d79","AI Open Source","",0,2,"en",[16],{"id":17,"step_order":18,"title":19,"description":11,"prompt_template":20,"variables":11,"depends_on":21,"expected_output":11},3643,1,"ClamAV Overview","# ClamAV — Open Source Antivirus Engine for Servers and Mail Gateways\n\n## Quick Use\n```bash\n# Install on Debian\u002FUbuntu\nsudo apt install clamav clamav-daemon\n\n# Update virus definitions\nsudo freshclam\n\n# Scan a directory\nclamscan -r \u002Fpath\u002Fto\u002Fscan\n\n# Start the daemon for on-access scanning\nsudo systemctl start clamav-daemon\n```\n\n## Introduction\nClamAV is a free, open-source antivirus toolkit designed primarily for mail gateway scanning and server-side file inspection. Maintained by Cisco Talos, it provides reliable malware detection with regularly updated signature databases and is widely deployed on Linux servers and email infrastructure.\n\n## What ClamAV Does\n- Scans files and directories for malware using signature-based detection\n- Runs as a daemon (clamd) for high-throughput scanning via socket or TCP\n- Updates virus definitions automatically through the freshclam updater\n- Supports scanning of archives, email attachments, PDF, and Office documents\n- Integrates with mail transfer agents like Postfix, Exim, and Sendmail\n\n## Architecture Overview\nClamAV consists of three main components: clamscan (standalone scanner), clamd (multi-threaded daemon), and freshclam (signature updater). The scanning engine uses a combination of signature matching, heuristic analysis, and bytecode signatures. clamd keeps signature databases loaded in memory for fast repeated scans, communicating with clients over a Unix socket or TCP port.\n\n## Self-Hosting & Configuration\n- Install from your distribution package manager or compile from source\n- Run `freshclam` immediately after install to download the latest signature database\n- Configure clamd via `\u002Fetc\u002Fclamav\u002Fclamd.conf` for socket path, scan limits, and logging\n- Set up freshclam as a systemd timer or cron job for automatic daily updates\n- Integrate with Postfix using clamav-milter or amavisd-new for email scanning\n\n## Key Features\n- Detects millions of malware signatures with daily database updates from Cisco Talos\n- Multi-threaded daemon mode handles high scan volumes with low latency\n- Supports on-access scanning via the clamonacc module on Linux\n- Scans inside archives (zip, tar, gzip, rar) and compound document formats\n- Provides a C API (libclamav) for embedding scanning into custom applications\n\n## Comparison with Similar Tools\n- **Sophos** — commercial AV with broader endpoint protection but requires licensing\n- **ESET** — advanced heuristics and low resource usage but proprietary and paid\n- **rkhunter** — rootkit-focused scanner but not a general-purpose antivirus\n- **chkrootkit** — lightweight rootkit checker but limited malware signature coverage\n- **VirusTotal** — cloud-based multi-engine scanning but not suitable for offline or bulk use\n\n## FAQ\n**Q: Is ClamAV effective as a desktop antivirus?**\nA: ClamAV is designed for server and mail gateway use. It lacks real-time GUI protection features that desktop users expect from consumer antivirus products.\n\n**Q: How often are virus signatures updated?**\nA: Cisco Talos publishes signature updates multiple times per day. freshclam checks for updates at a configurable interval, typically every few hours.\n\n**Q: Can ClamAV scan files on upload in a web application?**\nA: Yes. Use clamd with a socket connection from your application code or a reverse proxy module to scan uploaded files before they reach storage.\n\n**Q: Does ClamAV detect zero-day threats?**\nA: ClamAV primarily uses signature-based detection. 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