Add APN Interfaces for Single Engines

You can define multiple APN Interfaces for the Modem Interface.

For more details about the product and how to configure features, click Help or press F1.

An APN Interfaces is a logical interface that uses a cellular modem to connect to a mobile network using an APN.

Important: You can only add up to 8 APN interfaces for a modem interface.

Steps

  1. Right-click a Single Engine and select Edit Single Engine.

    The Engine Editor opens.

  2. In the navigation pane on the left, select Interfaces.

    The Interfaces pane opens on the right.

  3. Do one of the following:
    1. Right-click the Modem Interface, then select New APN Interface.
    2. Select the Modem Interface, click the Add button, and then select the APN Interface option.
  4. Define the APN Interface properties.
  5. Click OK.

Next steps

Add IPv4 Address or IPv6 Address for the APN Interface.

APN Interface Properties dialog box

Use this dialog box to configure properties for APN Interfaces.

Option Definition
General tab
Access Point Name The access point name that is provided by your service provider.
Authentication Method

(Optional)

 The authentication method that is used by the service provider.
  • No Authentication
  • PAP — Password Authentication Protocol.
  • CHAP — Challenge-Handshake Authentication Protocol.
  • MSCHAPV2 — Microsoft version of the CHAP protocol.
Username The user name provided by your service provider.
Password The password provided by your service provider. By default, passwords and keys are not shown in plain text. To show the password or key, deselect the Hide option.
Zone

(Optional)

 Select the network zone to which the interface belongs. Click Select to select an element, or click New to create an element.
Quality of Service and bandwidth Management section
QoS Mode

(Optional)
Select the QoS mode to apply to the link on this interface. You can select from one of the following options:
  • No QoS: When selected, no QoS mode is enabled.
  • QoS Statistics Only: It allows the collection of QoS Class-based counters without activating any other QoS feature.
  • DSCP Handling and Throttling: When selected, no queues and no throttling of all traffic. Only the connections that are tagged with QoS Class are treated as per the action that is defined in the QoS policy.
  • Full QoS: It throttles all traffic to the Interface Throughput Limit that is set in the interface properties.
Note:
  • If Full QoS or DSCP Handling and Throttling is selected, a QoS policy must also be selected. If Full QoS is selected, the throughput must also be defined.
  • If the interface is a Physical Interface, the same QoS mode is automatically applied to any VLANs created under it.
MTU

(Optional)

The maximum transmission unit (MTU) size on the connected link. Either enter a value between 1280–65535 or select a common MTU value from the list.

Note: If the service provider provides a lower MTU, it is used.

The default value (also the maximum standard MTU in Ethernet) is 1500. Do not set a value larger than the standard MTU, unless you know that all devices along the communication path support it.

To set the MTU for a Virtual Engine, you must configure the MTU for the interface on the Master Engine that hosts the Virtual Engine, then refresh the policy on the Master Engine and the Virtual Engine.

Comment

(Optional)

 A comment for your own reference.
Option Definition
Advanced tab
Override Engine’s Default Settings When selected, the default settings of the Security Engine are overridden.
SYN Rate Limits
  • Default — The interface uses the SYN rate limits defined for the Security Engine on the Advanced Settings branch of the Engine Editor.
  • None — Disables SYN rate limits on the interface.
  • Automatic — This is the recommended mode if you want to override the general SYN rate limits defined on the Advanced Settings branch of the Engine Editor. The Engine calculates the number of allowed SYN packets per second and the burst size (the number of allowed SYNs before the Security Engine starts limiting the SYN rate) based on the Engine’s capacity and memory size.
  • Custom — Enter the values for Allowed SYNs per Second and Burst Size.
Allowed SYNs per Second Defines the number of allowed SYN packets per second.
Burst Size The number of allowed SYNs before the Engine starts limiting the SYN rate.

We recommend that you set the burst size to be at least one tenth of the Allowed SYNs per Second value. If the burst size is too small, SYN rate limits do not work. For example, if the value for Allowed SYNs per Second is 10000, set the value for Burst Size to at least 1000.

Enable Log Compression By default, each generated Antispoofing and Discard log entry is logged separately and displayed as a separate entry in the Logs view. Log Compression settings allow you to define the maximum number of separately logged entries. When the defined limit is reached, a single antispoofing log entry or Discard log entry is logged. The single entry contains information about the total number of the generated Antispoofing log entries or Discard log entries. After this log entry, the logging returns to normal and all generated entries are once more logged and displayed separately. Log Compression is useful when the routing configuration generates a large volume of antispoofing logs or the number of Discard logs becomes high.
For each event type, Antispoofing or Discard, you can define:
  • Log Rate (Entries/s) — The maximum number of entries per second. The default value for antispoofing entries is 100 entries/s. By default, Discard log entries are not compressed.
  • Burst Size (Entries) — The maximum number of matching entries in a single burst. The default value for antispoofing entries is 1000 entries. By default, Discard log entries are not compressed.
Set to Default Returns all changes to the log compression settings to the default settings.