Two new CF2021 servers, initial install done by a guy who's out of the country on vacation. On the one intended as a dev box, verifying datasources in cf admin works fine. On the one intended as next-gen production, it shows no result at all, not OK or an error. Has anyone seen this? Any idea what the cause or fix might be? I suspect he locked something down too tight, but I haven't had a chance to research what the options are in that area.

I would look at where the datasource is and go from there. Either the new server isnt allowing traffic to the datasource, or the datasource isnt allowing traffic to the new server, would be my first take.

First thing I would do is make sure that can get to the server (i.e. ping it) from another machine. If you can, then you know you have network connection working . The next thing, check the firewall rules. Ensure you don't have the firewall blocking all traffic (including the database ports. If this is a SQL Server environment, make sure that you have the SQL server configuration correct. Remember, port 1433 is NOT automatically opened by the SQL server. If you are using MySQL, remember to download the JBDC driver as it doesn't come with ACF. That should start you off as that is what I do when spinning up a windows server.

For anyone following along at home (hah!), that future production server lives in the DMZ between inside and outside, db server is inside, and it turns out there was a typo in the firewall rules that didn't allow that traffic to get through. Once our network guy sorted that out, everything worked normally. Huzzah!