cayvman wrote I must have inadvertently closed off the internet. Or failed to turned it on. Did you set up the firewall already? Installed a zone forwarding? See...

Sure it is possible, although it makes not much sense. First of all, real-live distance is limited by the main router. Second, repeater mode often introduces more problems - like hidden node problems...

I agree with Johnsontp. TL-WA5210's directional antenna supports a maximum distance of 2km at best. Better use CPEs.

RTouris wrote One thing that's puzzling me though is that this specific CPE was used as an AP for another link for a few months now with no issues whatsoever, which makes me thing maybe this is due...

Are you able to set up the firewall for yourself to protect the LAN network against access from the guest network? See https://wiki.openwrt.org/doc/recipes/guest-wlan-webinterface for how to do with...

First you create an interface with name guest. Be sure to assign a static IP and a netmask: Then set up DHCP, it can help to not have to change between IPs on your laptop/PC: Now configure the...