We are looking at larger number of filebeats installations in the production environments. One challenge is that in some cases logstash host:5044 is not reachable from the filebeat host. How do we check using curl (nc is not available) that filebeat will be able to talk to logstash? I tried in cases where that connectivity is working fine and curl -v will return 'connection refused'; in cases where it does not have connectivity it would hang - but is there a better way/more definitive? I need to tell users that are installing filebeat a definitive way so we do not even go with the install if the connectivity is not working (opening ports is separate task in a sense that we still need to figure out what exactly is needed to establish that connectivity).