@Clive_A Thank you for this, very much appreciated. I look forward for the adapted ER605v2 firmware so i can test this on a couple easily-accessible remote sites i have. I have a couple follow-up...

@KNR remove your public and internal IPs from your post, thas just asking for toruble having not just a public IP, but an internal one on a DMZ in plain text on an internet forum!

@MarekZegarek ah right, you dont have an omada router......the controller can only manage DHCP reservations for an omada controlled router, not anything else. This is expected. The best you can do is...

We have a device (theatre lighting desk) that uses the ETC Nomad software for remote control / mirroring. Unfortuantely, this software completely lacks the option to point it directly at a target IP,...

Wouldnt a better way of optimising this be to allow a !location_group, like we can on the 5.15 adapted firmwares with !network and !ip_group ? Then you only have to have the regions you want to allow...

@Matva Yes