I have an LTE/3G dongle connected via USB to my RB750.
My network range is 192.168.0.*
The dongle is on 192.168.8.1
How can I access the web interface of the dongle from a computer on my network?
actually, you should have it. check your firewall rules. i think you have smth like "HiLink" modem. It has it's own DHCP that gives ip gw and dns to LTE interface in RB. Check if there is a route to 192.168.8.* subnetnobody?