User Documentation
Page 94
1. Investigate generally the Internet 
accessibility in terms of configured 
network parameters:
➢ Check via menu ‘Diagnostics → Ping test’ if 
an Internet IP (eg. 8.8.8.8) is accessible.
➢ Check via menu ‘Diagnostics → Ping test’ if 
an Internet device via DNS name (eg. 
www.google.com) is accessible.
➢ Please read Chapter 4.6 (Setup of a remote 
access scenario / Configuration Router).
2. Router Internet access is blocked by 
company-based Firewall rules
➢ Please read Appendix (Required Protocols 
and ports for u-link).
➢ Clarify with IT department to allow the 
outgoing u-link communication based on the 
required protocols / ports (see Appendix A4).
Appendix 1 – Registration of Router to u-link failed (How to solve)
Router Web interface
(Menu u-link / Tab Registration)
Status: Registration failed!
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Note:
If during the registration process - before 
displaying the final status ‘Registration failed’ 
– only the status “getting CA certificate’ is 
displayed in the meantime (and not the status 
‘enrolling certificate’) then this is an Indication 
that a corporate Firewall or Proxy server is 
blocking the registration process.
Please press button ‘Reload‘ repeatedly to
monitor the temporary status messages.
When the registration process is started via 
button ‘Register’ please click button ‚Reload‘ 
repeatedly to update the status.
3. Router Internet access is passing a company-based 
Proxy server which requires an authentication to 
establish an Internet connection
➢ Configure in menu ‘Network → HTTP proxy’ the 
required settings (provided by IT department).
➢ Enable checkbox “Use system wide HTTP proxy” in 
menu u-link → Configuration.
V1.5.1 / Oct, 2020
Error message
A1 - Router registration failed
Failure message 2: Registration failed - Network error (Check network and proxy settings)










