Best Answer spongygr , 31 March 2020 - 07:28 PM
I had the same problem on my ubuntu 16.04 server for the last 3 days. After a restart it looks like it is working but only for a small amount of time.
I found what was wrong.
the connection was being done over ipv6
Connecting to www.mb3admin.com (www.mb3admin.com)|2600:3c02::f03c:91ff:fe6e:540|:443... failed: Connection timed out.
now for some reason it times out.
i disabled ipv6 on my server
sudo sysctl -w net.ipv6.conf.all.disable_ipv6=1
sudo sysctl -w net.ipv6.conf.default.disable_ipv6=1
sudo sysctl -w net.ipv6.conf.lo.disable_ipv6=1
now is working fine.
Connecting to www.mb3admin.com (www.mb3admin.com)|184.108.40.206|:443... connected.