10. easyE4 communication Connection to other devices
10.11 Secure communication with certificates
The following messages can appear:
l
Unable to establish an encrypted connection.
Make sure that easySoft 8 is attempting to connect to the right easyE4 base
device; check the device's IP address and domain (if any).
l
Unable to check the server's domain name or IP address with the server cer-
tificate.
Make sure that easySoft 8 is attempting to connect to the right easyE4 base
device;
check the device's IP address and domain (if any).
l
Certificate error: The certificate cannot be used for communications.
The easyE4 device certificate or the Eaton easyE4 root certificate may be locked
or may not be released for communications.
l
Certificate error: The issuer certificate is invalid or unknown!
The Eaton easyE4 root certificate was probably not installed successfully –
please refer to → "How can I check to make sure that the Eaton easyE4 root cer-
tificate has been successfully installed on my PC/tablet/cell phone?", page 702
l
The certificate has expired!
Check the easyE4's device time. The device time may be incorrect, causing a TLS
certificate (level 4) that has already elapsed or that is not yet valid to be gen-
erated.
10.11.4 How does a certificate request work?
Every time a connection is established between your PC/tablet/cell phone and the
easyE4 device, the device certificate is checked in order to make sure that the PC/t-
ablet/cell phone is actually connecting to the easyE4 and not to an unauthorized
device. The easyE4 certificate chain consists of a total of four certificates.
When the connection is being established, the authenticity of the requested easyE4
is verified with the certificate chain.
696
easyE402/24 MN050009ENEaton.com
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