<%NUMBERING1%>.<%NUMBERING2%>.<%NUMBERING3%> PRTG Manual: HTTP Apache ModStatus Totals Sensor

The HTTP Apache ModStatus Totals sensor monitors the activity of an Apache web server using mod_status over HTTP.

i_round_blueThis sensor implicitly supports SNI, an extension to the Transport Layer Security (TLS) protocol.

HTTP Apache ModStatus Totals Sensor

HTTP Apache ModStatus Totals 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: HTTP Apache ModStatus Totalen
  • French: Apache ModStatus totaux (HTTP)
  • German: HTTP Apache ModStatus Gesamt
  • Japanese: HTTP Apache ModStatus 合計
  • Portuguese: Totais Apache ModStatus (HTTP)
  • Russian: HTTP Apache ModStatus — итоги
  • Simplified Chinese: HTTP Apache ModStatus 合计
  • Spanish: Totales Apache ModStatus (HTTP)


Consider the following remarks and requirements for this sensor:



SRP ciphers

  • This sensor does not support Secure Remote Password (SRP) ciphers.

Smart URL replacement


  • This sensor supports IPv6.

Performance impact

  • This sensor has a low performance impact.

Knowledge Base

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:

  • apache
  • httpsensor
  • httpapachemodstatustotalssensor

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

HTTP Specific

HTTP Specific

HTTP Specific



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.


Enter the URL to the mod_status module on your Apache server. PRTG automatically appends /server-status?auto to it. If you enter an absolute URL, the sensor uses this address independently of the IP Address/DNS Name setting of the parent device.

i_square_cyanPRTG uses a smart URL replacement with which you can use the parent device's IP address or Domain Name System (DNS) name setting as part of the URL. For more information, see section Smart URL Replacement.







Define if authentication is necessary on the web page:

  • Web page does not need authentication (default)
  • Web page needs authentication

User Name

This setting is only visible if you select Web page needs authentication above.

If the proxy requires authentication, enter the user name for the proxy login. Enter a string.


This setting is only visible if you select Web page needs authentication above.

Enter a password.

Authentication Method

This setting is only visible if you select Web page needs authentication above.

Select the authentication method that the URL uses:

  • HTTP authentication (default): Use simple HTTP authentication.
    i_round_redThis authentication method transmits credentials as plain text.
  • NT LAN Manager authentication: Use the Microsoft NT LAN Manager (NTLM) protocol for authentication.
  • Digest access authentication: Use digest access authentication. This applies a hash function to the password, which is safer than HTTP authentication (default).

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.

Smart URL Replacement

Instead of entering a complete address in the URL field of an HTTP sensor, you can only enter the protocol followed by a colon and three forward slashes (this means that you can enter either http:/// or https:///, or even a simple forward slash / as the equivalent for http:///). PRTG automatically fills in the parent device's IP Address/DNS Name in front of the third forward slash.

Whether this results in a valid URL or not depends on the IP address or Domain Name System (DNS) name of the parent device. In combination with cloning devices, you can use smart URL replacement to create many similar devices.

For example, if you create a device with the DNS name www.example.com and you add an HTTP sensor to it, you can provide values in the following ways:

  • If you enter https:/// in the URL field, PRTG automatically creates the URL https://www.example.com/
  • If you enter /help in the URL field, PRTG automatically creates and monitor the URL http://www.example.com/help
  • It is also possible to provide a port number in the URL field. It is taken over by the device's DNS name and is internally added, for example, http://:8080/

i_round_redSmart URL replacement does not work for sensors that run on the probe device.

Channel List

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




The number of accesses


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


The data transferred

i_round_blueThis channel is the primary channel by default.


i_square_blueKNOWLEDGE BASE

Which HTTP status code leads to which HTTP sensor status?

What security features does PRTG include?

My HTTP sensors don't work. What can I do?