User Documentation

Version 1.2 / August 2020 Page 48 / 102
4.2.8 Configuration → VPN
VPN → u-link (Tab Configuration)
Menu
Configuration → VPN → u-link → Tab “Configuration”
Function
Enable u-link instance
Enables the routers connectivity service to be used for the
Weidmüller u-link Remote Access Service.
Initiation by digital input
(VPN initiate):
Allows/Denies to establish a VPN connection to the u-link plat-
form by setting 24 VDC on digital input “VPN initiate”.
Initiation from u-link web
portal
Never allowed: u-link cannot be initiated remotely from the u-
link portal
Always allowed: u-link can be initiated remotely from the u-link
portal
Allowed if digital input (VPN-Initiate) is active: u-link can be ini-
tiated remotely from the u-link portal only if the external digital
input (‘VPN initiate’ set to 24 VDC) is active.
Use a system-wide HTTP
proxy
Enable this checkbox if the HTTP/HTTPS based Internet ac-
cess of the Router (for establishing an u-link VPN tunnel) is
controlled by a proxy server which requires an authentication
for passing. The system wide HTTP proxy must be configured
under Configuration → Network → HTTP proxy.
Log level
None: Will log no messages through the Event Log
Info: Log only some information and critical errors
Debug: Log state information too
Verbose: Log all possible messages
VPN LED/output control-
ler
Disabled: The LED and digital output are not used by u-link.
u-link: LED is blinking during connecting and on during
connection, digital output “VPN active” is set to ON
as long as the VPN tunnel is established.
Polarity of digital input
(VPN initiate)
Rising edge: VPN is triggered by rising edge of input voltage
(from 0 V to 24 V)
Falling edge VPN is triggered by falling edge of input voltage
(from 24 V to 0 V)