After several months of use, suddenly had 4 sites disconnected over 2 different Host’s. Was unable to get them to re-connect.
After several hours of research on here, the net and emails back and forth with the host, I managed to find what appears as the cause and a temp solution. Hopefully may help others in the same situation.
By running the “Test Connection” I noticed that a site’s IP was showing in IPv4 format, but from the “Child Site” the Server Information was being displayed in IPv6 format. Wondering if this mismatch was the cause, I tried using the “Force IPv4” in Advanced Settings, but to no avail. To doubly make sure IPv4 was being served I then deleted the DNS AAAA record on the server.
This fixed the problem ensuring the same IP at both ends.
Is this normal behaviour for MainWP?
Why does the main control panel plugin use IPv4 but the Child Site plugin use IPv6?
Is there a fix for this or do I need to delete more AAAA records on the other problem site’s server?