Tung iptables conf

Installing and Configuring Firewall

Introduction

In this page, you are going to create a firewall that allows outside world to access your web page in the server

Instruction

1. Login as root user
2. Clear up the rules in your iptables: iptables -F
3. Change the input chain default policy to drop: iptables -P INPUT DROP
4. Create a rule that allow outside to access http port only: iptables -I INPUT -p tcp --dport http -j ACCEPT
5. Change the input chain default policy to drop: iptables -P OUTPUT DROP
6. Create a rule that allow packets to output from http port only: iptables -I OUTPUT -p tcp --sport http -j ACCEPT
7. View your web page from other virtual machine. The web page should be displayed.
8. Try to ssh and ping from virtual machine to your server. All connections should be blocked.
9. Save your iptables rules: service iptables save