<div dir="auto">Glad to hear it. </div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Apr 2, 2020, 12:18 PM David Mathog <<a href="mailto:mathog@caltech.edu">mathog@caltech.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Solved it.<br>
<br>
The problem was that firewalld was running on CentOS 8. It sets up a <br>
firewall but those changes are NOT visible in "iptables --list", so<br>
I didn't know it was there until an nmap from another machine showed port <br>
9090 on the CentOS 8 machine. lsof had nothing attached to 9090. This was<br>
super confusing. It turned out that firewalld for some reason had<br>
opened that port for "cockpit" even though that package is not only not <br>
running, but is not installed. (And never was.) Good thing that it did<br>
so, it turns out, or I would never have started looking for _another_ <br>
firewall.<br>
<br>
So the solution is to stop firewalld and then disable it. Otherwise, add <br>
rules to firewalld allowing gmond/gmetad connections. The RPMs that were<br>
rebuilt from the Fedora src.rpm did not contain commands to set these <br>
rules, apparently.<br>
<br>
Regards,<br>
<br>
David Mathog<br>
<a href="mailto:mathog@caltech.edu" target="_blank" rel="noreferrer">mathog@caltech.edu</a><br>
<br>
</blockquote></div>