PRTG Manual: SNMP Cisco ASA VPN Connections Sensor
The SNMP Cisco ASA VPN Connections sensor monitors the VPN connections on a Cisco Adaptive Security Appliance 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.
- Dutch: SNMP Cisco ASA VPN Verbindingen
- French: Cisco ASA connexions VPN (SNMP)
- German: SNMP Cisco ASA VPN-Verbindungen
- Japanese: SNMP Cisco ASA VPN 接続数
- Portuguese: Conexões VPN Cisco ASA (SNMP)
- Russian: Подключения SNMP Cisco ASA VPN
- Simplified Chinese: SNMP Cisco ASA VPN 连接
- Spanish: Conexiones VPN Cisco ASA (SNMP)
- This sensor supports the IPv6 protocol.
- This sensor has a very low performance impact.
- For a general introduction to the technology behind SNMP, see section Monitoring via SNMP.
The Add Sensor dialog appears when you manually add a new sensor to a device. It only shows the settings that are required to create the sensor. You can change nearly all settings on the sensor's Settings tab after creation.
Click the Settings tab of a sensor to change its settings.
Setting |
Description |
---|---|
Sensor Name |
Enter a name to identify the sensor. |
Parent Tags |
Shows tags that the sensor inherits from its parent device, parent group, and parent probe.
|
Tags |
Enter one or more tags. Confirm each tag with the Spacebar key, a comma, or the Enter key. You can use tags to group objects and use tag-filtered views later on. Tags are not case-sensitive. Tags are automatically inherited.
The sensor has the following default tags that are automatically predefined in the sensor's settings when you add the sensor:
|
Priority |
Select a priority for the sensor. This setting determines the position of the sensor in lists. The highest priority is at the top of a list. Choose from the lowest priority ( |
Usually, a sensor connects to the IP Address/DNS Name of the parent device. See the device settings for details. For some sensors, you can explicitly define the monitoring target in the sensor settings.
Setting |
Description |
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Primary Channel |
Select a channel from the list to define it as the primary channel. In the device tree, the last value of the primary channel is always displayed below the sensor's name. The available options depend on what channels are available for this sensor.
|
Graph Type |
Define how different channels are shown for this sensor:
|
Stack Unit |
This setting is only visible if you enable Stack channels on top of each other as Graph Type. Select a unit from the list. All channels with this unit are stacked 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. |
By default, all of the following 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.
Click to interrupt the inheritance.
Setting |
Description |
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SNMP Version |
Select the Simple Network Management Protocol (SNMP) version for the connection to the target SNMP device:
|
Community String |
This setting is only visible if you select SNMP v1 or SNMP v2c (recommended) above. Enter the community string of your device. This is like a clear-text password for simple authentication.
|
Authentication Method |
This setting is only visible if you select SNMP v3 above. Select the authentication method:
|
User Name |
This setting is only visible if you select SNMP v3 above. Enter the user name for access to the target SNMP device.
|
Password |
This setting is only visible if you select SNMP v3 above. Enter the password for access to the target SNMP device.
|
Encryption Type |
This setting is only visible if you select SNMP v3 above. Select an encryption type:
|
Encryption Key |
This setting is only visible if you select SNMP v3 above. Enter an encryption key. If you provide a key, PRTG encrypts SNMP data packets with the encryption algorithm that you selected above. Enter a string or leave the field empty.
|
Context Name |
This setting is only visible if you select SNMP v3 above. Enter a context name only if the configuration of the device requires it. Context is a collection of management information that is accessible by an SNMP device. Enter a string. |
SNMP Port |
Enter the port for the connection to the SNMP target device. Enter an integer value. The default port is 161.
|
Timeout (Sec.) |
Enter a timeout in seconds for the request. Enter an integer value. The maximum timeout value is 300 seconds (5 minutes).
|
Click to interrupt the inheritance.
Setting |
Description |
---|---|
Scanning Interval |
Select a scanning interval from the dropdown list. The scanning interval determines the amount of time that the sensor waits between two scans. Choose from:
|
If a Sensor Query Fails |
Select the number of scanning intervals that the sensor has time to reach and to check a device again if a sensor query fails. Depending on the option that you select, the sensor can try to reach and to check a device again several times before the sensor shows the Down status. This can avoid false alarms if the monitored device only has temporary issues. For previous scanning intervals with failed requests, the sensor shows the Warning status. Choose from:
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Schedules, Dependencies, and Maintenance Window
You cannot interrupt the inheritance for schedules, dependencies, and maintenance windows. The corresponding settings from the parent objects are always active. However, you can define additional schedules, dependencies, and maintenance windows. They are active at the same time as the parent objects' settings.
Setting |
Description |
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Schedule |
Select a schedule from the list. You can use schedules to monitor during a certain time span (days or hours) every week. Choose from:
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Maintenance Window |
Select if you want to set up a one-time maintenance window. During a maintenance window, monitoring stops for the selected object and all child objects. They show the Paused status instead. Choose between:
|
Maintenance Begins |
This setting is only visible if you enable Set up a one-time maintenance window above. Use the date time picker to enter the start date and time of the one-time maintenance window. |
Maintenance Ends |
This setting is only visible if you enable Set up a one-time maintenance window above. Use the date time picker to enter the end date and time of the one-time maintenance window. |
Dependency Type |
Select a dependency type. You can use dependencies to pause monitoring for an object depending on the status of a different object. You can choose from:
|
Dependency |
This setting is only visible if you enable Select a sensor above. Click |
Dependency Delay (Sec.) |
This setting is only visible if you select Select a sensor above. Define a time span in seconds for the dependency delay. After the master sensor for this dependency returns to the Up status, PRTG additionally delays the monitoring of the dependent objects by the time span you define. This can prevent false alarms, for example, after a server restart or to give systems more time for all services to start. Enter an integer value.
|
Click to interrupt the inheritance.
Setting |
Description |
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User Group Access |
Define the user groups that have access to the sensor. You see a table with user groups and group access rights. The table contains all user groups in your setup. For each user group, you can choose from the following group access rights:
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Which channels the sensor actually shows might depend on the monitored device, the available components, and the sensor setup.
Channel |
Description |
---|---|
Active Email Sessions |
The number of active email sessions |
Active IPSec Sessions |
The number of active Internet Protocol Security (IPsec) sessions |
Active L2L Sessions |
The number of active LAN-to-LAN (L2L) sessions |
Active LB Sessions |
The number of active LB sessions |
Active Sessions |
The total number of active sessions
|
Active SVC Sessions |
The number of active switched virtual circuit (SVC) sessions |
Active Users |
The number of active users |
Active WebVPN Sessions |
The number of active WebVPN users |
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 in percent. |
Groups With Active Users |
The number of groups with active users |
Knowledge Base
What security features does PRTG include?
What SNMP sensors does PRTG offer?
My SNMP sensors don’t work. What can I do?
For more information about sensor settings, see the following sections: