Telnet works on AWS URL and localhost but not on IP

Question

These are working fine:

telnet ec2-x-x-x-x.compute-1.amazonaws.com 443
telnet localhost 443
telnet internal.ip 443
telnet hostname 443

These are not working

telnet x.x.x.x 443
telnet freedns.dynu.com 443

However telnet on port 80 works fine with all of them.

My AWS Ubuntu 18 box has a /etc/hosts file that reads

127.0.0.1 localhost

# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts

netstat -ln says:

tcp        0      0 127.0.0.53:53           0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN
tcp        0      0 127.0.0.1:3306          0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:10000           0.0.0.0:*               LISTEN
tcp6       0      0 :::22                   :::*                    LISTEN
tcp6       0      0 :::443                  :::*                    LISTEN
tcp6       0      0 :::80                   :::*                    LISTEN

What am I missing or where am I going wrong?

Technically if ec2-x-x-x-x.compute-1.amazonaws.com is good then the IP address should also be good.

Answer 1

You do not have a process (web server) listening on IPv4 port 80 or 443. You do have a process (web server) listening on IPv6 ports 80 and 443.

The problem is that your web server is either not setup for 0.0.0.0:80 and 0.0.0.0:443 or your web server failed during startup. Consult your web server logfiles.

These addresses could only have worked resolving IPv6 addresses.

telnet ec2-x-x-x-x.compute-1.amazonaws.com 443
telnet localhost 443
telnet internal.ip 443
telnet hostname 443