PRTG Manual: FTP Sensor

The FTP sensor monitors file servers via the File Transfer Protocol (FTP) and FTP over SSL (FTPS).

i_round_blueThe sensor also shows the response message of the server in the sensor message.

FTP Sensor

FTP 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: FTP
  • French: FTP
  • German: FTP
  • Japanese: FTP
  • Portuguese: FTP
  • Russian: FTP
  • Simplified Chinese: FTP
  • Spanish: FTP

Remarks

  • This sensor has a medium performance impact.
  • This sensor only supports the IPv4 protocol.

Add Sensor

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.

Basic Sensor Settings

Click the Settings tab of a sensor to change its settings.

Basic Sensor Settings

Basic Sensor 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.

i_round_blueThis setting is for your information only. You cannot change it.

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.

i_round_blueIt is not possible to enter tags with a leading plus (+) or minus (-) sign, nor tags with parentheses (()) or angle brackets (<>).

i_round_blueFor performance reasons, it can take some minutes until you can filter for new tags that you added.

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

  • ftpsensor

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 (i_priority_1) to the highest priority (i_priority_5).

i_round_blueUsually, 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.

Sensor Specific

Sensor Specific

Sensor Specific

Setting

Description

Timeout (Sec.)

Enter a timeout in seconds for the request. Enter an integer. The maximum timeout value is 900 seconds (15 minutes).

i_round_blueIf the reply takes longer than this value, the sensor cancels the request and shows a corresponding error message.

Port

Enter the number of the FTP port that the sensor tries to connect to. Enter an integer.

i_round_blueWe recommend that you use the default value.

i_round_blueIf the connection is unsuccessful, try a different port number.

FTP Mode

Define the FTP connection mode that the sensor uses for the connection to the FTP server:

  • Active mode: If you cannot establish a connection, use the passive mode.
  • Passive mode (default)

i_round_blueWe recommend that you use the default value.

Connection Security

Connection Security

Connection Security

Setting

Description

Transport-Level Security

Specify if the sensor uses connection security:

  • Use transport-level security if available: The sensor tries to connect via Secure Sockets Layer (SSL)/Transport Layer Security (TLS). It automatically determines whether to connect via the explicit mode or the implicit mode. If the server does not support SSL/TLS, the sensor tries to connect without connection security and shows the Up status if this works.
  • Enforce transport-level security: The connection must be established via SSL/TLS (in the explicit mode or the implicit mode). Otherwise, the sensor shows the Down status.
  • Do not use transport-level security: The sensor connects to the FTP server without connection security.

i_round_blueSee the sensor logs to see which method the sensor previously used to connect to the FTP server.

Authentication

Authentication

Authentication

Setting

Description

User Name

Enter a user name for the FTP login. Enter a string or leave the field empty.

i_round_blueThe default user name is anonymous. If the sensor cannot log on to the FTP server with this user name (or a different user name that you define), the sensor message shows that the credentials are incorrect but the sensor remains in the Up status.

Password

Enter a password for the FTP login. Enter a string or leave the field empty.

i_round_blueIf the sensor cannot log on to the FTP server with this password, the sensor message shows that the credentials are incorrect but the sensor remains in the Up status.

Result Handling

Define what PRTG does with the sensor result:

  • Discard result: Do not store the sensor result.
  • Store result: Store the last sensor result in the \Logs\sensors subfolder of the PRTG data directory on the probe system. The file names are Result of Sensor [ID].txt and Result of Sensor [ID].Data.txt. This setting is for debugging purposes. PRTG overwrites these files with each scanning interval.

i_podThis option is not available when the sensor runs on the hosted probe of a PRTG Hosted Monitor instance.

i_round_blueIn a cluster, PRTG stores the result in the PRTG data directory of the master node.

Sensor Display

Sensor Display

Sensor Display

Setting

Description

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.

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 different channels are shown for this sensor:

  • 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 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.

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.

Scanning Interval

Scanning Interval

Scanning Interval

i_square_cyanFor more information, see section Root Group Settings, section Scanning Interval.

Schedules, Dependencies, and Maintenance Window

i_round_blueYou 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.

Schedules, Dependencies, and Maintenance Window

Schedules, Dependencies, and Maintenance Window

i_square_cyanFor more information, see section Root Group Settings, section Schedules, Dependencies, and Maintenance Window.

Access Rights

Access Rights

Access Rights

i_square_cyanFor more information, see section Root Group Settings, section Access Rights.

Channel List

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

Channel

Description

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.

Response Time

The response time in msec

i_round_blueThis channel is the primary channel by default.

More

i_square_blueKnowledge Base

What security features does PRTG include?