Devices behind the edge gateway do not have an internet connection

5 Nov 2026
Knowledge

Problem

Devices behind the edge gateway do not have an internet connection.

Cause

By default, LAN devices do not have internet access (e.g. PLCs). Even when configured correctly, in certain conditions it's possible that LAN devices do not have internet access, even when they should.

Solution

Verify that the basic settings are all set correctly.

In the edge gateway settings, make sure that Allow access to internet or Allow limited access is enabled and pushed to the edge gateway.
In the LAN device's network settings (e.g. the PLC's), make sure that the edge gateway's LAN IP address is entered as the LAN device's default gateway.

That's generally all you need to do for your LAN devices to get internet access.

If your LAN devices still do not have internet access after following the above steps and the edge gateway is using a cellular connection, an additional step may be required.

Set the edge gateway's cellular MTU size to automatic.
- For instructions to configure this through the IXON Cloud, see Change the edge gateway's WAN configuration.
- For instructions to change this on the local web interface of the edge gateway, follow the instructions below.

IXrouter3

Connect locally to the edge gateway, or set up a VPN connection, and enter the edge gateway's LAN IP address in a new browser tab to open the local web interface.
Go to Configuration and log in.
- The default password (PW) can be found on the side of the edge gateway.
- If you cannot login with the default password, the password has been changed. Please contact the person that commissioned the edge gateway.
- If there is no password (PW) on the side, the edge gateway does not have a default password configured because it was manufactured before this feature existed. We can then configure a password for you. Make sure that the edge gateway is online and tell us on which device you'd like us to configure a password when granting us support access at Fleet Manager > Tools.
Under Cellular, clear the MTU field.
- An empty MTU size effectively sets the MTU size to automatic.
Apply the settings.
In the IXON Cloud, go to Fleet Manager > Devices and click on your device name.
Open the sync optionsand select Import config from device.

SecureEdge and SecureEdge Pro

Connect locally to one of the LAN ports of the edge gateway or set up a VPN connection.
- The local web interface is not accessible from the WAN side (Cloud port and also OT/LAN port when it's configured as WAN2).
Open a new browser tab, go to the edge gateway's LAN IP address, and log in.
- The default LAN IP address is 192.168.140.1.
- If you're connecting locally, make sure that your laptop has an IP address in the same range. You may need to configure this manually. There are many online guides on this if you need a step by step guide.
- The default username is admin.
- The default password (PW) is printed on the side of the edge gateway.
- The number of login attempts is limited per time window, in compliance with cybersecurity standard IEC 62443-4-2. By default, the number of login attempts is limited to 5 per 1 minute, replenishing a login attempt every 1 minute. We recommend you configure this to align with your corporate security policy. Do so by logging in and going to Administration > Authentication.
- You can change the password by logging in and going to Administration > Change password.
Go to Network > WAN.
Under Cellular, set the MTU size to default.
- A default MTU size effectively sets the MTU size to automatic. This is not the same as the deprecated "default MTU size" that was in the IXON Cloud, which effectively set the MTU size to 1200.
Submit the changes.
In the IXON Cloud, go to Fleet Manager > Devices and click on your device name.
Open the sync optionsand select Import config from device.

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Devices behind the edge gateway do not have an internet connection

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