Network Address Translation — Port Forwards | pfSense Documentation
Example for Configuring NAT and Redirection to Implement Two Egresses and Provide the Web Service - AR100-S, AR110-S, AR120-S, AR150-S, AR160-S, AR200-S, AR1200-S, AR2200-S, and AR3200-S CLI-based Typical Configuration Examples - Huawei
Cyber Security/Secure Router or Modem - Dahua Wiki