The graph on the right shows the dependency on the settings of an application for Global Setting using the SSL v3 protocol.
Introduction
In this menu you define the encryption protocol that is used to address the applications on the UTM. The basic settings selected by Securepoint are currently considered secure and have been tested for compatibility.
If a higher level of protection is required, the settings can be changed in the → Authentication →Cryptographic settings menu (jargon: harden).
The tab Global displays the basic settings.
With Overwrite default values: these values for all applications can be overwritten.
The default values or
The changes made in the Global tab can in turn be overwritten separately for each application.
The settings in the application menus can (partially) apply the global values by selecting Apply value from GLOBAL tab.
The graph on the right shows the dependency on the settings of an application for Global Setting using the SSL v3 protocol.
Cryptographic settings
The settings are made in the menu → Authentication →Cryptographic settings
Caption
Value
Description
Global
Global
Override defaults:
Off
If this function is activated, the settings for the protocols can be changed.
Global Encryption Settings
TLS min version:
Select TLS version
selectable is
Use the default value 1.0 (Default) 1.1 1.2
TLS max version:
Select TLS version
selectable is
Use the default value 1.0 1.1 1.2 (Default)
DH Key Size:
2048
The length of the Diffie-Hellmann key can be set to 2048 bit (default) or 4096 bit.
Cipher suite:
In the field Cipher-Suite the desired encryption and modes can be defined.
Webserver
Webserver
Override defaults:
Off
If this function is activated, the settings for the protocols can be changed.
Encryption settings for web server connections
TLS min version:
Select TLS version
selectable is
Use value from GLOBAL tab 1.0 (Default) 1.1 1.2
TLS max version:
Select TLS version
selectable is
Use value from GLOBAL tab 1.0 1.1 1.2 (Default)
DH Key Size:
2048
The length of the Diffie-Hellmann key can be set to 2048 bit (default) or 4096 bit.
ECDH 384 Bit:
On
Uses the Elliptic Curve Diffie-Hellman method with 384 bits for key calculation.
Cipher suite:
In the field Cipher-Suite the desired encryption and modes can be defined. Default: ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:ECDH+3DES:DH+3DES:RSA+AESGCM:RSA+AES:RSA+3DES:!aNULL:!MD5:!DSS;
SSL-VPN
SSL-VPN
Gobal control connection settings:
Override defaults:
Off
If this function is activated, the settings for the protocols can be changed.
Encryption for SSL-VPN connections
TLS min version:
Select TLS version
selectable is
Use value from GLOBAL tab 1.0 (Default) 1.1 1.2
TLS min version:
Select TLS version
selectable is
Use value from GLOBAL tab 1.0 1.1 1.2 (Default)
DH Key Size:
2048
The length of the Diffie-Hellmann key can be set to 2048 bit (default) or 4096 bit.
Cipher suite:
In the field Cipher-Suite the desired encryption and modes can be defined.
The button ⤺ Reset resets the settings in the currently opened area to the global values. If Overwrite default values is deactivated again, the settings in the currently opened area are reset to the default values of the individual application.
Changing the default settings may result in not all target systems being available for all users. For example, if they use older clients or web browsers that do not support the required encryption.
The services are restarted when the new settings are saved.This results in the web server requiring the administrator and/or user of the UTM web interface to log on again.
CLI
The settings that are made in the web interface are visible on the Command Line Interface using the following commands.
The encryption of the individual applications can be done with the same command. Only the name of the application must be exchanged. The following applications are available:
extc value get application "webserver"
extc value get application "openvpn"
extc value get application "smtpd"
extc value get application "squid-reverse"
Changes made on the CLI must be activated by restarting the respective application. The command for this is:
appmgmt restart application "[Name of the application]"