Iptables allow port from ip

We’ll show you, How to Open Ports in Ubuntu and CentOS using IPtables. Having a properly configured firewall is very important for the overall security on your server. In this tutorial, we are going to show you how to set up your firewall and open the ports you need on your Linux VPS, using iptables.

Let’s get started.

While there are few powerful tools to manage the firewall on a Linux server, we are going to use IPtables in this tutorial. In case you are using UFW on Ubuntu or Firewalld on CentOS, you can check our corresponding guides about how to set up a firewall with UFW on Ubuntu or how to configure a firewall with FirewallD on CentOS.

1.

Connect via SSH and list current IPtables

First of all, connect to your Linux VPS via SSH and list the current IPtables rules using the following command:

sudo iptables -L

If you recently set up your server there will be no IPtables rules and the output should be similar to the one below:

Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain

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