Add mcpwall to Security section

README.md

@@ -1262,6 +1262,7 @@ Tools for conducting research, surveys, interviews, and data collection.
 - [adeptus-innovatio/solvitor-mcp](https://github.com/Adeptus-Innovatio/solvitor-mcp) 🦀 🏠 - Solvitor MCP server provides tools to access reverse engineering tools that help developers extract IDL files from closed-source Solana smart contracts and decompile them.
 - [AIM-Intelligence/AIM-Guard-MCP](https://github.com/AIM-Intelligence/AIM-MCP) 📇 🏠 🍎 🪟 🐧 - Security-focused MCP server that provides safety guidelines and content analysis for AI agents.
 - [atomicchonk/roadrecon_mcp_server](https://github.com/atomicchonk/roadrecon_mcp_server) 🐍 🪟 🏠 MCP server for analyzing ROADrecon gather results from Azure tenant enumeration
+- [behrensd/mcp-firewall](https://github.com/behrensd/mcp-firewall) 📇 🏠 🍎 🪟 🐧 - Deterministic security proxy (iptables for MCP) that intercepts tool calls, enforces YAML policies, scans for secret leakage, and logs everything. No AI, no cloud.
 - [BurtTheCoder/mcp-dnstwist](https://github.com/BurtTheCoder/mcp-dnstwist) 📇 🪟 ☁️ - MCP server for dnstwist, a powerful DNS fuzzing tool that helps detect typosquatting, phishing, and corporate espionage.
 - [BurtTheCoder/mcp-maigret](https://github.com/BurtTheCoder/mcp-maigret) 📇 🪟 ☁️ - MCP server for maigret, a powerful OSINT tool that collects user account information from various public sources. This server provides tools for searching usernames across social networks and analyzing URLs.
 - [BurtTheCoder/mcp-shodan](https://github.com/BurtTheCoder/mcp-shodan) 📇 🪟 ☁️ - MCP server for querying the Shodan API and Shodan CVEDB. This server provides tools for IP lookups, device searches, DNS lookups, vulnerability queries, CPE lookups, and more.