Linux 4.4.74-desktop-1.mga5 #1 SMP Mon Jun 26 07:50:58 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
Internet connection is fiber through a Buffalo Airstation WXR-1900DHP (Version 2.37)
I purchased a domain to make it easier to access files on my server at home. I don't have a static IP, I subscribe to Dyn for their DynDNSPro service. The service is managed by ddclient that checks and sync's everything every 5 minutes. According to Dyn's logs my IP hasn't changed within the past 5 days and my account is paid up until next year.
Yesterday (Thursday) afternoon my domain suddenly became unreachable. I could not ping the hostname or the IP address. Everything inside my LAN was fine - I had no trouble accessing the services directly from the server (sitting by my right foot). I rebooted everything. Did not resolve. Nmap showed all the expected open ports on the server. Nmap on the domain sees something, but it all seems filtered.
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[root@spike madams]# nmap adams-lan.org
Starting Nmap 6.47 ( http://nmap.org ) at 2017-07-08 00:56 MDT
Note: Host seems down. If it is really up, but blocking our ping probes, try -Pn
Nmap done: 1 IP address (0 hosts up) scanned in 3.13 seconds
[root@spike madams]# nmap -Pn adams-lan.org
Starting Nmap 6.47 ( http://nmap.org ) at 2017-07-08 00:56 MDT
Nmap scan report for adams-lan.org (64.130.94.10)
Host is up (0.052s latency).
rDNS record for 64.130.94.10: fiber-dhcp-64-130-94-10.yucca.net
All 1000 scanned ports on adams-lan.org (64.130.94.10) are filtered
Nmap done: 1 IP address (1 host up) scanned in 190.28 seconds
I called my isp and they claim nothing has changed on their end, and yup, my domain is down. No more help available.
I looked at my account at namecheap.com where I purchased the domain - all is well there.
I wound up reinstalling and rebuilding the box (I have excellent backups). A fresh install resulted in the same condition - local services all okay, domain shows no sign of life.
At this point, I'm stumped. I've no idea where else to look. I'm not totally sure the SSL component is working. I made sure I restored all of the files related to apache and had to install the ssl and ldap mod's to get it to start. The server does start without error but the ssl checker I tested it with (https://www.sslshopper.com/ssl-checker. ... ms-lan.org) sees no ssl cert, but does see a valid domain.
Port 443 is open on the router and the firewall is open. I've even taken it down completely for testing. It doesn't help. The box shows Port 443 open on the server LAN, but again, it appears all ports on adams-lan.org are filtered.
Help?