network-netcat

# Netcat Network Utility ## Overview Netcat (nc) is the "Swiss Army knife" of networking tools, providing simple Unix utility for reading and writing data across network connections. This skill covers authorized offensive security applications including reverse shells, bind shells, file transfers, port scanning, and banner grabbing. **IMPORTANT**: Netcat capabilities can be used maliciously. Only use these techniques in authorized penetration testing environments with proper written permission. ## Quick Start Basic connection and listening: ```bash # Listen on port 4444 nc -lvnp 4444 # Connect to remote host nc <target-ip> <port> # Banner grab a service echo "" | nc <target-ip> 80 # Simple port scan nc -zv <target-ip> 1-1000 ``` ## Core Workflow ### Netcat Operations Workflow Progress: [ ] 1. Verify authorization for network testing [ ] 2. Test basic connectivity and port availability [ ] 3. Perform banner grabbing and service enumeration [ ] 4. Establish reverse or bind shells (if authorized) [ ] 5. Transfer files between systems [ ] 6. Create relay and pivot connections [ ] 7. Document findings and clean up connections [ ] 8. Remove any backdoors or persistence mechanisms Work through each step systematically. Check off completed items. ### 1. Authorization Verification **CRITICAL**: Before any netcat operations: - Confirm written authorization for network testing - Verify in-scope targets and allowed activities - Understand restrictions on shell access and d...