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Linux Port Redirection Methods
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- Introduction and Environment
- Port redirection enables network traffic control and management
- Multiple methods should not be used simultaneously
- Verification can be done using nc command
- Main Methods
- iptables uses PREROUTING chain with NAT table for TCP traffic redirection
- socat enables data transfer and networking with port redirection
- UFW provides simplified interface to iptables for port redirection
- firewalld offers full-fledged firewall with port redirection capabilities
- nftables uses rules and tables for fine-grained traffic control
- Implementation Details
- Most methods require packet forwarding for network connectivity
- Rules can be saved to persist across system reboots
- Services can be created for automatic startup
- Rules can be defined in specific files for persistent configuration