<%NUMBERING1%>.<%NUMBERING2%>.<%NUMBERING3%> PRTG Manual: SNMP SonicWall VPN Traffic Sensor

The SNMP SonicWall VPN Traffic sensor monitors the traffic of an Internet Protocol Security (IPsec) VPN on a SonicWall Network Security Appliance (NSA) via the Simple Network Management Protocol (SNMP).

SNMP SonicWall VPN Traffic Sensor

SNMP SonicWall VPN Traffic Sensor

i_square_cyanFor a detailed list and descriptions of the channels that this sensor can show, see section Channel List.

Sensor in Other Languages

  • Dutch: SNMP SonicWall VPN Verkeer
  • French: SonicWall trafic VPN (SNMP)
  • German: SNMP SonicWall VPN-Datenverkehr
  • Japanese: SNMP SonicWall VPN トラフィック
  • Portuguese: Tráfego de VPN SonicWall (SNMP)
  • Russian: Трафик VPN SonicWall по SNMP
  • Simplified Chinese: SNMP SonicWall VPN 流量
  • Spanish: Tráfico VPN SonicWall (SNMP)


Consider the following remarks and requirements for this sensor:




  • This sensor supports IPv6.

Performance impact

  • This sensor has a very low performance impact.

Knowledge Base

Add Sensor




Select the connections that you want to monitor. PRTG creates one sensor for each connection that you select.

Basic Sensor Settings

Basic Sensor Settings

Basic Sensor Settings

The sensor has the following default tags that are automatically predefined in the sensor's settings when you add the sensor:

  • snmpsonicwallvpntrafficsensor
  • traffic

i_square_cyanFor more information about basic sensor settings, see section Sensor Settings.

SonicWall VPN Specific

SonicWall VPN Specific

SonicWall VPN Specific



Security Policy

The security policy of the connection that this sensor monitors.

Remote IP Address

The remote IP address of the connection that this sensor monitors.

Source IP Addresses

The source IP addresses of the connection that this sensor monitors.

Destination IP Addresses

The destination IP addresses of the connection that this sensor monitors.


The index of the connection that this sensor monitors.

Identification Method

Define how you want to identify the connection that you want to monitor:

  • Index: Every connection has a unique index. This is the safest method to identify your connection. If the connection is lost and reconnected, it receives a new index.
  • Remote IP address: If the target of the VPN always has the same IP address, you can use this IP address to identify the connection.
  • Security policy name: If you use a different security policy for every VPN, you can use its name to identify the connection.
  • Remote IP address and security policy name: You can also combine both identification methods.
  • Remote IP address, security policy name, and IP address ranges: If you use separate connections for specific IP address ranges, identify the connection by remote IP address, security policy name, and IP address ranges.
  • IP address ranges: Use IP address ranges only to identify the connection.

i_round_blueThe sensor always uses the first connection that it finds that matches all criteria.

i_round_blueYou cannot change this value after sensor creation.

Sensor Display

Sensor Display

Sensor Display



Primary Channel

Select a channel from the list to define it as the primary channel. In the device tree, PRTG displays the last value of the primary channel below the sensor's name. The available options depend on what channels are available for this sensor.

i_round_blueYou can set a different primary channel later by clicking b_channel_primary below a channel gauge on the sensor's Overview tab.

Graph Type

Define how this sensor shows different channels:

  • Show channels independently (default): Show a graph for each channel.
  • Stack channels on top of each other: Stack channels on top of each other to create a multi-channel graph. This generates a graph that visualizes the different components of your total traffic.
    i_round_redYou cannot use this option in combination with manual Vertical Axis Scaling (available in the channel settings).

Stack Unit

This setting is only visible if you select Stack channels on top of each other above.

Select a unit from the list. PRTG stacks all channels with this unit on top of each other. By default, you cannot exclude single channels from stacking if they use the selected unit. However, there is an advanced procedure to do so.

Inherited Settings

By default, all of these settings are inherited from objects that are higher in the hierarchy. We recommend that you change them centrally in the root group settings if necessary. To change a setting for this object only, click b_inherited_enabled under the corresponding setting name to disable the inheritance and to display its options.

i_square_cyanFor more information, see section Inheritance of Settings.

Channel List

i_round_blueWhich channels the sensor actually shows might depend on the target device, the available components, and the sensor setup.



Decrypted Packets

The number of decrypted packets

Decrypted Transmissions

The decrypted transmissions


In the channel table on the Overview tab, this channel never shows any values. PRTG uses this channel in graphs and reports to show the amount of time in which the sensor was in the Down status

Encrypted Packets

The number of encrypted packets

i_round_blueThis channel is the primary channel by default.

Encrypted Transmissions

The encrypted transmissions

Fragmented Packets In

The number of incoming fragmented packets

Fragmented Packets Out

The number of outgoing fragmented packets


i_square_blueKNOWLEDGE BASE

Why does PRTG write error messages into my SonicWall log?

What security features does PRTG include?

My SNMP sensors don’t work. What can I do?