i use openwrt router as my main router. i connect the openwrt router to the ONT port and get a public ip address and can browse the internet etc.
i would like however use the isp provided livebox6 (Orange) to serve as a simple AP including a guest network that i use for working from home. as my lan is connected to a vpn in my home country and the work computer refuses to connect.
I disabled dhcp on the livebox and on the lan everything is working. the devices are obtaining the address from the openwrt router
BUT when I connect a device to the guest network that i configured on the livebox i do not get internet.
the devices on the lan use a 192.168.1.x/24 address.
the devices connected to the guest wifi have a 192.168.128.0/24 address with 192.168.128.1 as default gateway and dns.
this is the topology
INTERNET --> ONT---> OPENWRT---LIVEBOX
no devices are connected the livebox. it is there just to server as a wifi6 access points for lan and iot devices/work connected to the guest network.
the livebox appears to have running a separate dhcp server for the guest wifi... I do not know if that traffic is vlan tagged as the livebox is a blackbox and i cannot configure anything aside disabling dhcp and created basic nat rules.. etc
can i simply create a interface on the openwrt with ip address in the 192.168.128.x range and all it to a firewall zone guest so that i can access the wan? and nothing on the lan?