Skip to content
The XG Series hardware appliances will reach end-of-life (EOL) on March 31, 2025. Click here to see the XG to XGS migration documentation.

Page permalink

Always use the following permalink when referencing this page. It will remain unchanged in future help versions.

https://docs.sophos.com/nsg/sophos-firewall/21.0/Help/en-us/webhelp/onlinehelp/index.html?contextId=network-cellular-WAN-interface

Cellular WAN interface

When you turn on cellular WAN, the firewall creates the WWAN1 interface. This interface is a member of the WAN zone, and the firewall rules for the WAN zone apply to it. The firewall also creates the WWAN1 host. You can protect against malware attacks and unauthorized usage by specifying firewall rules and policies for the host.

Status

Click the Cellular WAN radio button to turn Cellular WAN on or off.

To view the modem details and the recommended configuration, click Show recommended configuration and click Load recommended configuration to load the settings.

You can see the following details for the Cellular WAN connection:

  • Status: Shows whether Cellular WAN is connected or disconnected. You can click Connect or Disconnect to turn the connection on or off.
  • Modem name: The name of the modem.
  • IP address: The IP address of the modem.
  • Gateway IP: The IP address of the gateway.
  • Bytes uploaded: The amount of data sent to the gateway.
  • Bytes downloaded: The amount of data received from the gateway.
  • Time duration: The length of time the connection has been active.

General settings

You can configure the following general settings:

  • Name: Enter a name up to a maximum of 58 characters. You can change this name later. The subsystems will show the customizable name instead of the interface's hardware name.
  • Hardware: The hardware name of the cellular WAN interface appears automatically. You can't change this name.

  • IP assignment: The IP assignment method used by the modem.

    Note

    For 5G wireless modules, only the Network adapter (DHCP) method is available. Dial-up (PPP) is turned off. You can't turn it on.

  • Connect: The mode to use to establish a cellular WAN connection.

  • Reconnect tries: The number of attempts the firewall makes when reconnecting to an access point. To provide unlimited attempts, select Always.
  • Modem port: The serial interface on which the modem will establish a connection.
  • Phone number: The phone number to use to establish the connection.
  • Username: The user name required for the connection.
  • Password: The password required for the connection.
  • SIM card PIN code: The code required to unlock the PIN-enabled SIM card.

  • APN: The access point name. The APN is a configurable network identifier that identifies the Packet Data Network (PDN) or the GSM carrier with which the user wants to communicate.

    Tip

    Check with your carrier for the recommended settings.

  • DHCP connect command: DHCP command to connect to the cellular WAN.

  • DHCP disconnect command: DHCP command to disconnect from the cellular WAN.
  • Initialization string: String that turns on or off certain features on the wireless modem. Priority is assigned according to the sequence indicated.

Gateway settings

You can configure the following gateway settings:

  • Gateway name: Name to identify the gateway.
  • Gateway IP: IP address of the gateway.

Other settings

You can configure the Assignment type. This is the method used to assign the values for Maximum Transmission Unit (MTU) and Maximum Segment Size (MSS). Select one of the following options:

  • Automatic: Fetches the values for MTU and MSS automatically from your ISP. This is the default option.

  • Manual: Use this option if the automatically fetched values don't work for you. Manually enter the values for the following settings:

    • MTU: Maximum Transmission Unit (MTU) value in bytes. This is the largest packet size that a network can transmit. Packets larger than the specified value are divided into smaller packets before they're sent.
    • MSS: Maximum Segment Size (MSS) in bytes. It's the amount of data that can be transmitted in a TCP packet.