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).

For 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)

Remarks

Consider the following remarks and requirements for this sensor:

Remark	Description
IPv6	This sensor supports IPv6.
Performance impact	This sensor has a very low performance impact.
Knowledge Base	Knowledge Base: Why does PRTG write error messages into my SonicWall log?

Add Sensor

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

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

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

SonicWall VPN Specific

Setting	Description
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.
Index	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 (default): 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. The sensor always uses the first connection that it finds that matches all criteria. You cannot change this value after sensor creation.

Sensor Display

Setting	Description
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. You can set a different primary channel later by clicking 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. You 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.

Setting

Description

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.

You can set a different primary channel later by clicking 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.
You 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 under the corresponding setting name to disable the inheritance and to display its options.

For more information, see section Inheritance of Settings.

Channel List

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

Channel	Description
Decrypted Packets	The number of decrypted packets
Decrypted Transmissions	The decrypted transmissions
Downtime	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 This 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