Ping Failing from collector to device and back?

2 minutes ago, Mike Moniz said:

Interesting, I haven't run into that yet myself. I typically have collectors located on the same network segment as the devices being monitored so not hitting firewalls, but some situations do go thru some. Is this specific to Windows or Linux Collectors?

The world is passing LM by there -- most organizations these days are moving to internal compartmentalization, which means firewalls of some sort.  We have generally seen it for smaller remote sites that have no desire or facilities for a local collector.  I don't think it matters what the collector platform is since the checks are all the same (Java/Groovy).  I tried a lot with our CSM back in 2018 and while they agreed in principal, it was considered a "feature request" and well, we know where those generally end up. I was also treated to circular logic (determined to be a problem with Palo Alto firewalls only, which is completely untrue, and evidence was an LM support page saying that Palo Altos have that problem).