<%NUMBERING1%>.<%NUMBERING2%>.<%NUMBERING3%> PRTG Manual: SSL Security Check Sensor

The SSL Security Check sensor monitors Secure Sockets Layer (SSL)/Transport Layer Security (TLS) connectivity to the port of a device. It tries to connect to the specified TCP/IP port number of a device with different SSL/TLS versions and shows if the device supports a particular protocol.

SSL Security Check Sensor

SSL Security Check 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: SSL Security Check
  • French: SSL vérification de sécurité
  • German: SSL-Sicherheitsüberprüfung
  • Japanese: SSL セキュリティーチェック
  • Portuguese: Verificação de segurança SSL
  • Russian: Проверка безопасности SSL
  • Simplified Chinese: SSL 安全检查
  • Spanish: Comprobación de seguridad SSL

Remarks

  • This sensor only checks accepted protocols, it does not consider the used ciphers.
  • This sensor supports the IPv6 protocol.
  • This sensor has a very low performance impact.
  • This sensor uses lookups to determine the status values of one or more channels. This means that possible states are defined in a lookup file. You can change the behavior of a channel by editing the lookup file that the channel uses. For details, see section Define Lookups.
  • See the Knowledge Base: How do you determine the protocol security ratings of the SSL Security Check sensor?

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. By default, PRTG shows this name in the device tree, as well as in alarms, logs, notifications, reports, maps, libraries, and tickets.

i_round_blueIf the name contains angle brackets (<>), PRTG replaces them with braces ({}) for security reasons. For more information, see the Knowledge Base: What security features does PRTG include?

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:

  • sslsensor

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.

SSL Security Specific

SSL Security Specific

SSL Security 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 port to which this sensor connects. Enter an integer. The default port is 443.

Virtual Host (SNI Domain)

Enter the host name that the sensor queries. The sensor uses this host for the connection if the target server has multiple certificates on the same IP address and IP port when using Server Name Indication (SNI).

Connection Specific

Connection Specific

Connection Specific

Setting

Description

Use SOCKS Proxy (v5 only)

Define if the sensor uses a SOCKS proxy server for the sensor connection:

  • Do not use SOCKS proxy (default): Directly connect to the target host without using a SOCKS proxy.
  • Use SOCKS proxy: Connect using SOCKS5. Provide data for the SOCKS connection below.
    i_round_blueOther SOCKS versions are not supported.

i_round_blueThis sensor only supports SOCKS5 proxies. It does not support HTTP proxies.

Server

This setting is only visible if you select Use SOCKS proxy above. Enter the IP address or host name of the proxy server that the sensor uses for connection.

Port

This setting is only visible if you select Use SOCKS proxy above. Enter the port number of the proxy server that the sensor uses for connection.

User Name

This setting is only visible if you select Use SOCKS proxy above. If the proxy server requires authentication, enter a username.

Password

This setting is only visible if you select Use SOCKS proxy above. If the proxy server requires authentication, enter the password for the user you specified above.

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.

Security Rating

The security of the connection to the defined port

  • Up status: Only Strong Protocols Available
  • Warning status: Weak Protocols Available
  • Down status: No Secure Protocol Available

i_round_blueThis channel is the primary channel by default.

SSL 2.0 (Deprecated)

No longer available

SSL 3.0 (Weak)

The status of connections using SSL v3

  • Up status: Denied
  • Warning status: Accepted

TLS 1.0 (Weak)

The status of connections using TLS 1.0

  • Up status: Denied
  • Warning status: Accepted

TLS 1.1 (Weak)

The status of connections using TLS 1.1

  • Up status: Accepted
  • Unknown status: Denied

TLS 1.2 (Strong)

The status of connections using TLS 1.2

  • Up status: Accepted
  • Unknown status: Denied

More

i_square_blueKNOWLEDGE BASE

What security features does PRTG include?

How do you determine the protocol security ratings of the SSL Security Check sensor?