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VPN Security and Private Connectivity · 2026-07-20 Do I need a public IP address to use VPN on a cellular router?

Not always. Many mobile services use private addressing or carrier-grade NAT, which means the old habit of expecting inbound access on a public IP no longer tells the whole story. Some deployments use VPNs initiated from the remote router outwards, while others use managed remote-access methods that work around the lack of a public address. Comset generally looks at the end goal first: do you need a permanent site-to-site tunnel, occasional technician acc…

VPN Security and Private Connectivity · 2026-07-19 I want to check a remote site from home. What is the safest way to do that?

The safest answer is to use the router’s supported secure remote-access or VPN method rather than exposing open ports directly to the internet. The exact option depends on the router, the carrier constraints and the wider security policy, but the design should always be deliberate: authenticated access, clear user permissions and a manageable support process. Comset can usually steer the discussion towards secure remote access without turning the project …

VPN Security and Private Connectivity · 2026-06-04 How much can encryption and VPN processing reduce the usable throughput of an industrial router?

VPN encryption consumes processor time and adds packet overhead. The reduction depends on the router CPU, encryption algorithm, packet size and number of tunnels. A modem capable of high cellular speed may still deliver much lower encrypted throughput if the router’s processor is the limiting factor. For low-volume telemetry the impact may be negligible. For 5G, cameras or large file transfers, ask for tested VPN performance rather than assuming the modem…

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