Embedded IoT gateway platforms feature fieldbus control interface, as well as superior WiFi/LTE/3G enabled edge device/cloud connectivity. Secure, scalable computing gateways with fieldbus interfaces enable seamless connection, aggregation, filtering, and data transmission to the cloud with confidence.

For industrial gateway application, we would recommend you following highly integrated Modular Fanless Embedded IPC.
One of Embedded IoT gateway fanless computer configuration like following:
Description: Intel Celeron N3350 2.4G,2GB DDR3L,32G eMMC, 3xLAN, 4xUSB, 4xCOM, 4DI,4DO, DC12-32V, Desk/wall-mounting

It's designed with high-speed programmable digital IO, 2LAN supported by Intel i210, which is ideally suitable for gateway.

Features:

• Compact & robust, noiseless & anti-shock, low power consumption, high performance.

• Intel Apollo Lake N3350 Dual core/N4200 Quad core CPU + Onboard DDR3L upto 8GB Memory

• High-speed programmable isolated 4DI+4DO

• Support 2 GigE vision cameras+2USB3.0 cameras

• 2RS232, 2RS485 serial ports

• 3LAN (LAN1 RTL8111H, LAN2/LAN3 Intel i210)

• HDMI+DP dual display

• Support remote switch, wall mounting

• 120*100*51mm, 0.65Kg

• -20°C~60°C fit for harsh environment

• CE/FCC certification

• Support Win10 64Bit, Linux

• API & DEMO support