2789-9023
Appendix
Product manual | Version: 1.0.0
67
EtherNet/IP Communication Module
11
Appendix
11.1 User Certificates
A certificate allows a secure connection for network communication and is used for au-
thenticating the remote host. The lock icon in the browser indicates that this website has
a valid, trusted certificate and that the connection is secure. We recommend replacing the
self-signed certificates generated in the product with your own.
Figure 39: Browser warning message due to self-signed certificate
Certificates you create yourself must be signed by a certificate authority (the so-called
root CA). The root certificate forms the shared trust anchor for all certificates subordinate
to it and must be stored in the local trust store of the browser or client. The following sec-
tions describe an example of creating keys and certificates with the XCA key manage-
ment software. This free software allows you to create certificates yourself. The certifi-
cates/keys are stored in a local database file. The database, which contains private keys
among other things, is protected with a password.
