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

Consider the following remarks and requirements for this sensor:

Remark

Description

Protocols

This sensor only checks accepted protocols. It does not consider the used ciphers.

IPv6

This sensor supports IPv6.

Performance impact

This sensor has a very low performance impact.

Lookups

This sensor uses lookups to determine the status values of one or more channels.

Knowledge Base

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

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:

  • sslsensor

i_square_cyanFor more information about basic sensor settings, see section 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 user name.

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, 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.

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

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

TLS 1.3 (Perfect)

The status of connections using TLS 1.3

  • 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?