proxy-server

# Proxy Server Skill Expert skill for proxy server implementation, configuration, and network traffic interception. ## Capabilities - **Proxy Configuration**: Configure Squid, mitmproxy, Charles, and nginx proxy - **HTTP CONNECT Tunneling**: Implement HTTP CONNECT for HTTPS tunneling - **SOCKS Protocol**: Configure SOCKS4/SOCKS5 proxy servers - **Transparent Proxying**: Implement transparent proxying with iptables/nftables - **Traffic Analysis**: Analyze proxy traffic and generate reports - **Debugging**: Debug proxy connection issues and SSL/TLS interception - **PAC File Generation**: Generate Proxy Auto-Configuration (PAC) files - **Caching**: Configure proxy caching strategies ## Tools and Dependencies - `Squid` - Caching proxy server - `mitmproxy` - Interactive HTTPS proxy - `nginx` - HTTP and reverse proxy - `iptables/nftables` - Linux firewall for transparent proxy - `Charles` - HTTP proxy/monitor - `tinyproxy` - Lightweight proxy ## Target Processes - http-proxy-server.js - socks5-proxy.js - transparent-proxy.js ## Usage Examples ### Squid HTTP Proxy Configuration ```squid http_port 3128 acl localnet src 10.0.0.0/8 http_access allow localnet cache_dir ufs /var/spool/squid 10000 16 256 ``` ### Transparent Proxy with iptables ```bash iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 3128 iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 443 -j REDIRECT --to-port 3129 ``` ### mitmproxy Interception ```bash mitmproxy -p 8080 --mode...