Sophos UTM supports network connections via 3G/UMTS Universal Mobile Telecommunications System USB sticks.
To configure a 3G/UMTS interface, proceed as follows:
On the Interfaces tab, click New Interface.
The Add Interface dialog box opens.
Make the following settings:
Name: Enter a descriptive name for the interface.
Type: Select 3G/UMTS from the drop-down list.
Hardware: Select a USB modem stick from the drop-down list. Note that you need to reboot after you plugged the USB stick in.
Network: Select the mobile network type, which is either GSM Global System for Mobile Communications/W-CDMA Wideband Code Division Multiple Access, CDMA Code Division Multiple Access, or LTE 3GPP Long Term Evolution.
IPv4/IPv6 default GW (optional): Select this option if you want to use the default gateway of your provider.
PIN (optional): Enter the PIN of the SIM card if a PIN is configured.
APN autoselect (optional): By default, the APN (Access Point Name) used is retrieved from the USB modem stick. If you unselect the checkbox, enter APN information into the APN field.
Username/Password (optional): If required, enter a username and password for the mobile network.
Dial string (optional): If your provider uses a different dial string, enter it here. Default is *99#.
Comment (optional): Add a description or other information.
Optionally, make the following advanced settings:
Init string: Enter the string to initialize the USB modem stick. Remember that it might become necessary to adjust the init string to the USB modem stick. In this case, the init string can be gathered from the associated USB modem stick manual. If you do not have the required documentation available, keep the default setting ATZ.
Reset string: Enter the reset string for the USB modem stick. Keep in mind that it might be necessary to adjust the reset string to the USB modem stick. In this case you can gather it from the associated USB modem stick manual. If you do not have the required documentation available, keep the default setting ATZ.
MTU: Enter the maximum transmission unit for the interface in bytes. You must enter a value fitting your interface type here if you want to use traffic management. A sensible value for the interface type is entered by default. Changing this setting should only be done by technically adept users. Entering wrong values here can render the interface unusable. An MTU size greater than 1500 bytes must be supported by the network operator and the network card (e.g., Gigabit interface). By default, an MTU Maximum Tansmission Unit of 1500 bytes is set for the 3G/UMTS interface type.
Default route metric: Enter the default route metric for the interface. The metric value is used to distinguish and prioritize routes to the same destination and is valid for all interfaces.
Asymmetric (optional): Select this option if your connection's uplink and downlink bandwidth are not identical and you want the Dashboard to reflect this. Then, two textboxes are displayed, allowing you to enter the maximum uplink bandwidth in either MB/s or KB/s. Select the appropriate unit from the drop-down list.
Displayed max (optional): Here you can enter the maximum downlink bandwidth of your connection, if you want the Dashboard to reflect it. The bandwidth can be given in either MB/s or KB/s. Select the appropriate unit from the drop-down list.
The system will now check the settings for validity. After a successful check the new interface will appear in the interface list. The interface is not yet enabled (toggle switch is gray).
Enable the interface.
Click the toggle switch to activate the interface.
The interface is now enabled (toggle switch is green). The interface might still be displayed as being Down. The system requires a short time to configure and load the settings. Once the Up message appears, the interface is fully operable.
To show only interfaces of a certain type, select the type of the interfaces you want to have displayed from the drop-down list. To either edit or delete an interface, click the corresponding buttons.