# Dedicated Cloud VPN Server

- **Language:** EN
- **Published on:** 2016-05-05

One of the most pressing issues in network communications recently is the shortage of public IPv4 addresses.
Currently, the term IoT, Internet of Things, is very popular, and more and more devices are connected and have internet access: smartphones, tablets, but also cars, refrigerators, dishwashers, televisions, ... and so on.

Many of these devices connect to the internet via a cellular connection, thanks to a SIM card from a telephone operator.
At the time of connection, this operator must assign an IP address to the device to allow it to communicate on the network.
Initially, this address was DYNAMIC and PUBLIC: meaning it was always assigned differently with each connection, but it was reachable via the internet from any other IP address.

![IP Pubblico](https://shop2.marcomweb.it/storage/blocks/images/CAdyfuv7F2QWDS5EBE5t1SgIbDGTtUOhw9gNbbpT.webp)

With the increasing demand for IP addresses, operators had to take action and created local area networks (LANs) distributed across the territory.
By doing so, when a new device connects to the network, it is no longer assigned a DYNAMIC and PUBLIC address, but rather a DYNAMIC and PRIVATE one.
To draw an analogy with classic private networks in the office or at home, the operator has a "router" (like a home ADSL router) that has a public IP address, while the various devices are assigned a private address in the subnet of this router.

![IP Privato](https://shop2.marcomweb.it/storage/blocks/images/Ve0L3yex8ZCRYwlRERfWTtyLMhqi1fUB4Va0sIJi.webp)

To reach your devices remotely, if these are cellular routers connected to your automation system, there are only two possibilities:

- request the telephone operator to assign a public IP address for each of your SIMs (M2M or DeNAT)
- **have a VPN infrastructure that allows reaching the routers through a protected, encrypted, and private connection**

MARCOM creates customized **OPENVPN CLOUD** servers, supporting up to 200 simultaneous OpenVPN clients. The main features are as follows:

- cloud service on a reliable and high-performance server: 1 GB RAM, 1 dedicated processor, 10 Gigabytes of monthly traffic
- firewall rules to limit/enable client visibility
- client/server authentication via certificates valid for 10 years
- static assignment of private IP addresses to clients
- possibility of creating LAN-to-LAN connections

The solution with a VPN server is as follows

![Soluzione OpenVPN](https://shop2.marcomweb.it/storage/blocks/images/KagKd5PnFYbhL6VgjcfvYDylIIEpjp9wmVus8SY7.webp)

The solution is compatible with Android and iOS smartphones, through the use of official or community OpenVPN APPs, with Windows, Linux, Mac OSX PCs.

Our solution for automation systems involves the use of devices with integrated OPENVPN client. We normally supply Inhand Networks routers or Teltonika routers with this property.

[INHAND NETWORKS IR611S ROUTER](it/shop-online/telecontrollo/router/router-industriale-3g-ir611-s-dettagli.html)[INHAND NETWORKS IR615S ROUTER](it/shop-online/in-evidenza/ir615-s-l3-router-industriale-4g-5-porte-ethernet-dettagli.html)[INHAND NETWORKS IR915 ROUTER](it/shop-online/telecontrollo/tutti-i-prodotti/router-cellulari/ir915l-fh09-s-2g-3g-4g-2xeth-100mbps-serial-port-dual-sim-dettagli.html)

[TELTONIKA RUT230 ROUTER](it/shop-online/obsoleti/teltonika-router-rut230-2g-3g-umts-con-wifi-global-dettagli.html)[TELTONIKA RUT240 ROUTER](it/shop-online/in-evidenza/teltonika-router-rut240-lte-4g-3g-2g-wifi-dettagli.html)[TELTONIKA RUT955 ROUTER](it/shop-online/telecontrollo/tutti-i-prodotti/router-cellulari/teltonika-router-4g-rut-955-con-seriale-ed-io-dettagli.html)

[OPENVPN CLOUD SERVER](it/shop-online/telecontrollo/servizi-software/openvpn-server-cloud-marcom-dettagli.html)

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Source: https://shop2.marcomweb.it/en/news/dedicated-cloud-vpn-server

MARCOM S.r.l. — a trusted supplier for industrial automation and building automation.