OC200 v1 5.1.7, fast roam not enabled, nor band steering at this time ER605+SG2008P if it matters My logs are filling up endlessly, because typically 1 client at a time, and usually only ever 2 of...

I'll presume based on the above respones you aren't currently using VLANs at all in your current design? If so, then imagine New108.port8 is connected to WAN2 of your ER605 router. Also, imagine that...

Well you could put another SG108 at the ER605 end and split out the VLANs again. That would allow you to re-use the single cable. More money, less effort?

@Sashabencic With the SG108, you should use 802.1q VLANs for the ISP connection. It should be untagged on the port attached to the modem, but tagged on ingress by the SG108 and received by the WAN2...

Can we implement filtering to drop posts that include 'dhabi' 'dubai' or a phone number format beginning with 05 or O5?

@Alex789 should be functionally equivalent. version 2 may provide more flexibility under Omada control than version 1, which has limited control over LAN ports on the routers.