Need Help Setting Up two Isolated Networks with ZTE F6600 Router

I'm seeking assistance with a networking setup using my ZTE F6600 router. Here's the scenario: Setup : Main Router : ZTE F6600 (provided by ISP) Devices : Linux server connected to the main router Requirement : I want to share internet access with a family in the same building. To achieve this, I plan to use an access point router and an Ethernet cable connected to one of the LAN ports of my main router. Objective : Create two isolated networks: One network for me (existing setup with the Linux server). Another network for the family sharing the internet. Challenges : I couldn't find a solutio

Question by Youssef Ben hammouda on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.