Hello,
Thank you for contacting Teltonika crowd support.
Port 80 on RUT240 is used to access RUT240 WEBUI using HTTP protocol. If you would like to use it for other purposes, you don’t have to disable the port. You just need to go to access control and assign HTTP a different port and then use port 80 for another purpose. To change HTTP port, go to System > Administration > Access Control scroll to HTTP change the port from port 80 to your preferred port, do not forget to open this port on the firewall.
Alternatively, you can open a new port on RUT240 and assign it to your cameras.
To open a port, go to Network >Firewall > Traffic Rules scroll to add instance and open ports set the the relevant parameters. If need be, you can also implement port forwarding. For more information on port forwarding check the following link https://wiki.teltonika-networks.com/view/RUT240_Firewall#Port_Forwards
For more technical support, kindly revert.
Kind regards,
Shadrack.