[Ubuntu]: Can't open any port
I followed the following guide:
and tried to open port 80, but I still have nothing open or listening:
netstat -plunt Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN 1051/mysqld tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 965/sshd tcp6 0 0 :::22
The strangest thing is that I could connect to the server yesterday and today it isn’t working anymore and the only thing I changed was to add a DNS entry on Digital Ocean.
Could this have anything to do with it?
I tried even to disable any protection with the following commands:
$ sudo iptables -X $ sudo iptables -t nat -F $ sudo iptables -t nat -X $ sudo iptables -t mangle -F $ sudo iptables -t mangle -X $ sudo iptables -P INPUT ACCEPT $ sudo iptables -P FORWARD ACCEPT $ sudo iptables -P OUTPUT ACCEPT
but still only port 22 is accessible. What could be the reason for this?