We are seeing the following SSL error on ntevl probe log. Should we be concerned?
Aug 23 22:32:01:747  ntevl: SSL - SSL_accept error (1) on new SSL connection
Aug 23 22:32:01:747  ntevl: SSL - accept failed for 18.104.22.168/58426
Release : 20.3
Component : UIM - NTEVL
This is a sign that "something" is attempting to connect to the open port that the probe listens on and initiate an SSL connection.
The most common cause of this is a vulnerability scan, which is attempting to find outdated/vulnerable SSL versions.
This is benign in terms of probe operation and can be ignored from the UIM point of view.
From a security point of view, it might be a good idea to identify the IP address in the log message and make sure it's something you expect to be connecting to other systems in your network.