Steps to reproduce:
- Set up a web scenario w/ the default useragent "Zabbix"
- Set up normal tcp[http] monitoring of a computer
- Check the logs
See log file...
"HEAD / HTTP/1.1" 502 3279 "-" "Zabbix/4...."
"GET / HTTP/1.1" 502 3769 "-" "Zabbix/4...."
Specification for useragent: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/User-Agent
The zabbix frontend and server are seen by users as a single platform, as such, the useragent for these two subcomponents should really be the same. And, it's a good idea for both sides to include a version number if only for debugging...