PRTG Manual: Port Sensor
The Port sensor monitors a network service by connecting to its port. It tries to connect to the specified TCP/IP port number of a device and waits for the request to be accepted.
Depending on your settings, the sensor can alert you either when the monitored port is open or when it is closed.
For a detailed list and descriptions of the channels that this sensor can show, see section Channel List.
- Dutch: Poort
- French: Port
- German: Port
- Japanese: ポート
- Portuguese: Porta
- Russian: Порт
- Simplified Chinese: 端口
- Spanish: Puerto
- This sensor does not support Secure Remote Password (SRP) ciphers.
- This sensor supports IPv6.
- This sensor has a very low performance impact.
You cannot add this sensor to the hosted probe of a PRTG Hosted Monitor instance. If you want to use this sensor, add it to a remote probe device.
Setting |
Description |
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Sensor Name |
Enter a name to identify the sensor. By default, PRTG shows this name in the device tree, as well as in alarms, logs, notifications, reports, maps, libraries, and tickets.
|
Parent Tags |
The 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 ( |
Setting |
Description |
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Timeout (Sec.) |
Enter a timeout in seconds for the request. Enter an integer. The maximum timeout value is 900 seconds (15 minutes).
|
Port |
Enter the number of the port to which this sensor connects. Enter an integer. |
Setting |
Description |
---|---|
Transport-Level Security |
Define the security of the connection:
|
Setting |
Description |
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Goal |
Define how the sensor reports on the port:
|
Command Handling |
This setting is only visible if you select Open above. Define whether the sensor sends a command after it opens the port:
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Command |
This setting is only visible if you select Send a command above. Enter the command that the sensor sends to the respective port in a Telnet session. Enter a string.
|
Response |
Define if the sensor further processes the response:
|
Allowed Response Code |
This setting is only visible if you select Check response code (integer) above. Enter the code that the target device must return. If the target device does not return this code, the sensor shows the Down status. Enter an integer. |
Check for Keywords (positive) |
This setting is only visible if you select Check response text above. Check if the response contains a specific keyword. If the response does not contain the keyword, the sensor shows the Down status.
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Response Must Include (Down Status if Not Included) |
This setting is only visible if you select Enable keyword check (positive) above. Define the search string that the response must contain. You can enter a simple string in plain text or a regular expression (regex).
|
Search Method |
Define the method with which you want to provide the search string:
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Check for Keywords (negative) |
This setting is only visible if you select Simple string search above. Check if the response does not contain a specific keyword. If the response does contain the keyword, the sensor shows the Down status.
|
Response Must Not Include (Down Status if Included) |
This setting is only visible if you select Enable keyword check (negative) above. Define the search string that the response must not contain. You can enter a simple string in plain text or a regex.
|
Search Method |
Define the method with which you want to provide the search string:
|
Result Handling |
Define what PRTG does with the sensor result:
|
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 select Stack channels on top of each other above. 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 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.
For more information, see section Root Group Settings, section Scanning Interval.
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.
For more information, see section Root Group Settings, section Schedules, Dependencies, and Maintenance Window.
For more information, see section Root Group Settings, section Access Rights.
Which channels the sensor actually shows might depend on the target device, the available components, and the sensor setup.
Channel |
Description |
---|---|
Available |
The time until a request to a port is accepted
|
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 |
KNOWLEDGE BASE
What security features does PRTG include?