Setting up Ethernet LAN network

I need assistance in setting up ethernet LAN network with OpenWrt and firewall configuration and intrusion detection systems for my small, simple network infrastructure. I also need to set up nmap (Cisco Packet Tracer), change network device's DNS address, IPv4, IPv6, and MAC address. The freelancer should be based in Hong Kong SAR. This is a one-time project.

The freelancer should ideally possess the following skills and experience:
- network security
- Proficient with Ethernet LAN installation and set up
- Proficient in OpenWrt
- Proficient in firewall configuration
- Knowledgeable in intrusion detection systems
- Experience working with small network infrastructures, creating new DNS address, IPv4, IPv6, and MAC address

Please be ready to provide examples of similar work you've done in the past. Thanks!