How to Open Port in Linux

How to open port in Linux

First, you should disable selinux, edit file /etc/sysconfig/selinux so it looks like this:

SELINUX=disabled
SELINUXTYPE=targeted

Save file and restart system.

Then you can add the new rule to iptables:

iptables -A INPUT -m state --state NEW -p tcp --dport 8080 -j ACCEPT

and restart iptables with /etc/init.d/iptables restart

If it doesn't work you should check other network settings.

Open port on Centos 8

1. Check port status

   netstat -na | grep 61009
   

2. Check port status in iptables

   iptables-save | grep 61009
   

3. Add the port

   # vi /etc/services
   service-name  port/protocol  [aliases ...]   [# comment]
   

4. Open port in the firewall

   # firewall-cmd --zone=public --add-port=61009/tcp --permanent
   success
   # firewall-cmd --reload
   success
   # iptables-save | grep 61009
   -A IN_public_allow -p tcp -m tcp --dport 61009 -m conntrack --ctstate NEW -j ACCEPT
   

5. Check added port status

   lsof -i -P |grep http
   netstat -na |grep 61009
   

How to open port 80 for node server on local machine?

Paste the output from

netstat -ptuln

command.I think the problem is that your web server runs on local address and can not be reachable for other machines in network.

centos 7 open port is open but not working

In some countries port 5060 is blocked by ISP
what i understand you opened the port in your virtual machine.
you need to open the port in VPS host panel security group as well.

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