How can VLANs and sensible LAN design stop the cellular router from becoming the weak point in a larger network?

Use VLANs to separate management, industrial equipment, cameras, staff devices and guest access. Apply firewall rules so each group can reach only the services it needs. The router’s administration interface should not be exposed to ordinary users, and remote access should terminate in a controlled management network rather than the whole LAN.

Change default credentials, disable unused services, restrict administration by source address and keep configuration backups. A separate managed switch may be needed for larger networks. The cellular router should be treated as a security boundary, not merely an internet socket. Confirm the selected Comset model’s VLAN, firewall and VPN capabilities before designing the final topology.