Connection refused telnet localhost 8080 - centos

Question

I am running a CentOS 7 machine and when I try to telnet localhost 8080 I get the following message
Trying ::1...
Telnet: connect to address ::1: Connection refused
Trying 127.0.0.1...
Telnet: conenct to address 127.0.0.1: Connection refused
I have added 8080/tcp to the IP table and have opened the port. Any idea what is stopping it?

Answer 1

That's simple: port 8080 is not opened, just like #Esse told you.
You can check the connection with echo also:
echo OK > /dev/tcp/localhost/8080
echo $?
You can list opened ports using netstat:
netstat -tulpn | grep 8080
Edit:
You can test that the port is not opened by trying to open the port yourself:
# open port 8080 using netcat
nc -l 8080 &
# check connection
netstat -tulpn | grep 8080
telnet localhost 8080
echo OK > /dev/tcp/$(hostname -f)/8080
nc 127.0.0.1 8080

Answer 2

same
$ sudo iptables -L -t nat
Chain PREROUTING (policy ACCEPT)
target prot opt source destination
DOCKER all -- anywhere anywhere ADDRTYPE match dst-type LOCAL
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
DOCKER all -- anywhere !localhost/8 ADDRTYPE match dst-type LOCAL
Chain POSTROUTING (policy ACCEPT)
target prot opt source destination
MASQUERADE all -- 172.17.0.0/16 anywhere
Chain DOCKER (2 references)
target prot opt source destination
RETURN all -- anywhere anywhere