In view of the importance of keeping the network always available and operational efficiency, some Blockbit appliances have built-in 3G / 4G / LTE module, providing connectivity to the mobile network infrastructure and allowing compatible appliances to have access. This solution is particularly useful in operations established in regions with unstable network performance, the feature aims to be used as a cost-effective alternative or also serving as a contingency network to guarantee availability in case of any unforeseen or bottleneck in the network.
This feature is available for use in internet access, static, dynamic routing policies, VPN and mainly in SD-WAN. If the appliance has a module installed, the graphical interface will automatically detect it allowing its configuration.
If the Appliance has 3G / 4G / LTE support, the interface will be automatically detected.
Click edit  on the WWAN0 interface.
Interfaces - Network edit Interfaces
The following screen will appear:
Interface 3G/4G/LTE - Edit Interfaces
Configure it according to the specifications of the respective fields, as shown below:
Interface 3G/4G/LTE - General
- Network Zone: Este campo refere-se à definição do tipo de agrupamento de interfaces. By default we have the “WAN”, “LAN” and “DMZ” zones. This is a mandatory requirement. Ex.: Enter “WAN” and select it from the list;
- Name: Refers to the identification of the network interface that was selected for editing. Ex.: “wwan0”;
- Description: Define a description to identify the configured interface. This is a mandatory requirement. Eg: “3G / 4G / LTE Connection”.
Interface 3G/4G/LTE – IPv4
To enable the IPv4 addressing standard, check the [. ] checkbox at the top of the panel and configure the form with the corresponding data for each field
- Dynamic IP[ ]: This check box is used to determine whether the IP will be automatically configured by DHCP. By checking this checkbox, the fields below will be disabled;
- IP Address: Defines the IPv4 address of the virtual interface. This is a mandatory requirement;
- Mask: This checkbox determines the mask corresponding to the IPv4 addressing. Este é um requisito obrigatório;
- Gateway: Define o endereço de gateway correspondente a rede. Este é um requisito NÃO obrigatório.
Interface 3G/4G/LTE – IPv6
To enable the IPv6 addressing standard, check the [. ] checkbox at the top of the panel and configure the form with the corresponding data for each field
- Dynamic IP[
- IP Address: Sets the IPv6 address of the virtual interface. This is a mandatory requirement;
- Prefix: Select the prefix corresponding to the IPv6 addressing. This is a mandatory requirement;
- Gateway: Defines the gateway address corresponding to the network. This is a NOT mandatory requirement.
There is a limit on the size of data transmitted over a network that limits the number of bytes that can be transmitted in a single packet. This limit, which is a characteristic of the link layer, is known as MTU ("Maximum Transmission Unit" or "Maximum Transmission Unit") and exists in several types of networks.
Below is a reference table of the standard MTU value for some types of networks.
MTU x Protocol table.
MTU (in bytes)
Ethernet Jumbo Frames
1501 - 9198
Token Ring 802.5
IEEE 802.3 / 802.2
Here is more information about the Advanced panel:
Interface 3G/4G/LTE – MTU
- MTU[ To enable this option, check the checkbox. This field defines the MTU of the virtual interface, the possible values are between 1280 to 9000 (JUMBO FRAME); ]:
In this panel the parameters of the 3G / 4G / LTE network are configured. The data in this panel is dynamic, so before configuring these fields, contact your operator for more information.
Interface 3G/4G/LTE – Parameters
Below we will describe the function of each of the fields in this panel.
- APN Server: Defines the server name;
- APN User: Determines the user to be used by the server;
- APN Password: Sets the user password;
- APN Auth Type: In this field, the type of authentication protocol to be used is determined, which can be:
- PIN: Determines the PIN number that will be used by the 3G / 4G / LTE interface.
If you want to delete all the settings made on this interface, click Erase.
To save changes, click Save, otherwise click Back[ ] to return to the previous screen.
After saving, you will need to access the command queue [UTM - Command queue.] and apply the changes made. For more information on the command queue access the page:
After performing these procedures, the interface will have been successfully configured.
For more information on how to configure a physical interface, visit this page.
To see the configuration parameters of the main operators, visit this page.