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Help needed to set up ZenWiFi XT9

EveningDarkstar

New Around Here
Hello, I am new to this forum so please bear with me if I make mistakes that violate this forums etiquette and customs.

I recently acquired a pair of ASUS ZenWiFi XT9 Tri-Band WiFi6 Mesh WiFiSystem but I am having trouble grokking how to set these up to handle the network configuration I need. I have a /29 block of public IP addresses (6 usable IP addresses) and I want to distribute these to different computers on my SOHO network. The kicker is that three of these computers are located in a remote telescope building with no wired connection capability. So I want to use the XT9s to extend my block of public IP addresses from my house (where my internet access fiber optics cable comes in) to the remote computers.

All of my computers are already connected on an internal 192.168.10.0/24 network with one computer acting as a gateway to one of my public IP addresses. The incoming fiber optics cable is connected to a switch and the switch intern has Cat5 cables running to 2 computers in my house, my gateway computer and one other computer. Both of these computers have a separate NIC card set up to handle traffic for one of my external public IP addresses, in essence assigning one of my public IP addresses to each computer. That works and each computer can run it's own Apache Web server, FTP service, etc. I just need to extend this concept to 3 other computers in another building. If I could run a Ethernet cable from the switch in my home to a switch in my telescope building that would work perfectly to extend my external set of /29 IP addresses to the other building. I need the XT9's to simply replace that "ideal" Ethernet cable with a WiFi link.

I don't have enough public IP addresses to assign one to each of my XT9's WLAN ports so that option is out. The trouble I am having is understanding how the LAN ports on the XT9's actually work. There are 3 of them on each XT9. Are all 3 of them combined in a simple switch, or are they expected to act as a gateway for 3 separate nets, each assigned with an IP address from the net to which they are connected?

So how do I configure these XT9's to handle my "external IP addresses" across the WiFi link? My guess was the assign one of my internal 192.168.10.0/24 IP addresses to the WLAN port on the XY9, and let my internal dhcpd server assign it an address along with route and gateway information. That much does work inside my house, but without understanding how the LAN side of the XT9's works, I don't know how to set these XT9's up to extend my public IP addresses across a link to my other building.

Thanks for any thoughts, comments, ideas in advance! Marc...
 

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