>As you seem to receive some resources via HTTP, the request should get
>logged somewhere.
I use "tail -f /var/log/apache2/access.log" and error.log on the console and then enter IP address in the browser.
When I enter
http://w.x.y.z the page is shown and access.log shows some messages.I also see some debug messages in error.log
IMO, the messages aren't important! since I see the page in the browser.
>You always tell you're accessing "w.x.y.z" and
>said "the server's page is reachble by an IP address", so I understand
>you're not using a host name, but IP address to connect. w.x.y.z reads
>like an IPv4 address, while your earlier report of open ports just
>gave an IPv6 port open for listening:
>
>root@webshub:~# netstat -tulpn | grep 443
>tcp6 0 0 :::443 :::*
>LISTEN 14709/apache2
>
>So there might be a chance your browser's requests doesn't even end up
>in *your* server.
I also think such thing is the root of the issue. Things are
1) Yes, I don't have hostname. So, I have to enter ip address.
2) The SSL certificates are created for our university where they have host name.
3) I don't know if the certificates are only usable with subdomains only. Any thought?
4) The netstat command shows the IPv6. Is that a firewall issue? iptables? ufw? Here is the output of ufw
root@webshub:~# ufw status
Status: active
To Action From
-- ------ ----
Apache Full ALLOW Anywhere
OpenSSH ALLOW Anywhere
20/tcp ALLOW Anywhere
21/tcp ALLOW Anywhere
990/tcp ALLOW Anywhere
40000:50000/tcp ALLOW Anywhere
Apache Full (v6) ALLOW Anywhere (v6)
OpenSSH (v6) ALLOW Anywhere (v6)
20/tcp (v6) ALLOW Anywhere (v6)
21/tcp (v6) ALLOW Anywhere (v6)
990/tcp (v6) ALLOW Anywhere (v6)
40000:50000/tcp (v6) ALLOW Anywhere (v6)
root@webshub:~# netstat -tulpn | grep 443
tcp6 0 0 :::443 :::* LISTEN 1114/apache2
root@webshub:~#