Web services and dns gone mad
I searched everywhere but I can't seem to find any answer on the (for me) inexplicable behavior of my web services and DNS. I am running the latest server version. I really hope somebody can help me...
It started when my isp changed my IP address. It's dynamic but normally it stays the same unless something unusual happens. Before this, the server was running fine, no issues that troubled daily operations. All my websites where online and happy. I didn't change or reconfigure anything.
Because of the new assigned IP address I off course changed the IP address for my domain at my host.
Since my IP address is changed, Website services are not behaving normally anymore. None of the SSL sites work anymore and the non SSL sites are very unstable. Sometimes they are online often they are not. The Reachability check shows that sometimes my Public Host Name looks healthy and sometimes only my IP address is available. It keeps changing for no apparent reason. When only the IP address is available and I do a Reachability check it tells me this: "This server's host name resolves to an IP address that does not match this server". I tried everything I can think of to resolve this. I am running a server for a few years now so I know a few tricks and I am pretty sure everything is configured as it should.
When I check the error logs I get error messages I don't know how or where to solve.
(Server Website SSL Error Log)
[Mon Jul 03 19:33:38.154329 2017] [ssl:warn] [pid 26347] AH01916: Init: (sub.domain.com:443) You configured HTTP(80) on the standard HTTPS(443) port!
AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using sub.domain.com. Set the 'ServerName' directive globally to suppress this message
(DNS Service Log)
03-Jul-2017 20:24:14.465 reloading configuration succeeded
03-Jul-2017 20:24:14.465 reloading zones succeeded
03-Jul-2017 20:24:14.466 zone 2.0.10.in-addr.arpa/IN/com.apple.ServerAdmin.DNS.public: has no NS records
03-Jul-2017 20:24:14.466 zone 2.0.10.in-addr.arpa/IN/com.apple.ServerAdmin.DNS.public: not loaded due to errors.
03-Jul-2017 20:24:14.517 all zones loaded
03-Jul-2017 20:24:14.517 running
Hopefully somebody can make sense of this all.
Mac mini (Late 2012), OS X Server