Dear All,

I am trying to open port 8140 on ubuntu 15.04 and having no luck.

My client is CentOS 8140 and I have open the port from their by going to firewalls and adding 8140 as tcp port. When I try to do a telnet test from centos to ubuntu it says connection refused from Ubuntu

root@puppet:~# sudo iptables -A INPUT -p tcp -d 0/0 -s 0/0 --dport 8140 -j ACCEPT
root@puppet:~# ufw status
Status: inactive
root@puppet:~# ps -aef|grep 8140|grep -v grep


root@puppet:~# iptables -L -n -v
Chain INPUT (policy ACCEPT 326 packets, 19843 bytes)
pkts bytes target prot opt in out source destination
3 180 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:8140

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination

Chain OUTPUT (policy ACCEPT 292 packets, 17637 bytes)
pkts bytes target prot opt in out source destination
root@puppet:~#

root@puppet:~# nmap puppet

Starting Nmap 6.47 ( http://nmap.org ) at 2016-05-16 11:24 AEST
Nmap scan report for puppet (127.0.1.1)
Host is up (0.0000030s latency).
Other addresses for puppet (not scanned): 192.168.1.7
Not shown: 997 closed ports
PORT STATE SERVICE
22/tcp open ssh
23/tcp open telnet
53/tcp open domain

Nmap done: 1 IP address (1 host up) scanned in 1.67 seconds
root@puppet:~#

What to do to solve this problem. I am totally confused and don't know which command to run and how to make this work...

Here we go, I added the further

sudo vi /etc/default/ufw
Ensured that IPV6=yes
ufw enable
added specific incoming request from agent1 ip but still from client to pupptserver it says connection refused.............

Any service listening on port 8140?

And if you need it to be available on the internet you also need to do a port forwarding on your router.

Nothing is listening on 8140

Not sure what you mean by available on internet. I have a laptop and laptop has 3 VM's. this particular port 8140 on one vm should be made accessible on other two VM's. I believe might be some service is not running which should listen on that port ??

How did you get the idea to open 8140? Why 8140? What is the application that uses 8140? Is it a web application?

So 8140 will not be open to the Internet? You just want it to be available of other 3 VMs?

Looks like someone has already addressed this:
http://serverfault.com/questions/153...rk-in-centos-5