How to Install iptables on Linux RHEL 5/CentOS 5 server

Iptables is used to set up, maintain, and inspect the tables of IPv4 packet filter rules in the Linux kernel. It can run as a host based firewall if properly configured. Iptables places rules into predefined chains (INPUT, OUTPUT and FORWARD) that are checked against any network traffic packets. In this post i will show the quick steps on how to install iptables on CentOS 5.7. This steps may working on other version such as CentOS 5.1, CentOS 5.2, CentOS 5.3, CentOS 5.4, CentOS 5.5, CentOS 5.6, RHEL 5.4 and RHEL 5.5.

See also  Three Ways to Configure Persistent Static Routes on Linux CentOS

1. To install iptables, simply run this command :

[root@CentOS57 ~]# yum install iptables -y
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirror.oscc.org.my
 * extras: mirror.oscc.org.my
 * rpmforge: ftp-stud.fht-esslingen.de
 * updates: mirror.oscc.org.my
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package iptables.i386 0:1.3.5-9.1.el5 set to be updated
--> Finished Dependency Resolution

Dependencies Resolved

====================================================================================================
 Package                 Arch                Version                      Repository           Size
====================================================================================================
Installing:
 iptables                i386                1.3.5-9.1.el5                base                238 k

Transaction Summary
====================================================================================================
Install       1 Package(s)
Upgrade       0 Package(s)

Total download size: 238 k
Downloading Packages:
iptables-1.3.5-9.1.el5.i386.rpm                                              | 238 kB     00:02
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing     : iptables                                                                     1/1

Installed:
  iptables.i386 0:1.3.5-9.1.el5

Complete!

2. How to check iptables status on Linux RHEL 5/CentOS 5 server :

[root@CentOS57 ~]# service iptables status
Firewall is stopped.

or

[root@CentOS57 ~]# /etc/init.d/iptables status
Firewall is stopped.
[root@CentOS57 ~]#

3. How to start iptables on Linux RHEL 5/CentOS 5 server :

[root@CentOS57 ~]# service iptables start

or

[root@CentOS57 ~]# /etc/init.d/iptables start

4. How to stop iptables on Linux RHEL 5/CentOS 5 server :

[root@CentOS57 ~]# service iptables stop

or

[root@CentOS57 ~]# /etc/init.d/iptables stop

How to Reset the Directory Manager Password on RHEL 7 / CentOS 7
How to Reset the Directory Manager Password on RHEL 7 / CentOS 7

It is best practice to remember passwords, but because too many passwords, sometimes we forget. We are not encouraged to write the password on any paper or share the password...

How to Find Big Files Size on Linux RHEL/CentOS
How to Find Big Files Size on Linux RHEL/CentOS

As the linux administrator, sometimes we have to identify which files are most take much space in the linux server resulting in low free space. Low disk space can also...

Why Linux users should worry about malware and what they can do about it
Why Linux users should worry about malware and what they can do about it

Don’t drop your guard just because you’re running Linux. Preventing the spread of malware and/or dealing with the consequences of infection are a fact of life when using computers. If...

How to Reset Forgotten Root Password on Linux RHEL 7/CentOS 7
How to Reset Forgotten Root Password on Linux RHEL 7/CentOS 7

This article will explain the steps to reset a lost root password or to reset forgotten root password on Linux RHEL 7 or CentOS 7. Basically, the steps will adding...

How to Update CentOS or Upgrade CentOS to the Latest Version
How to Update CentOS or Upgrade CentOS to the Latest Version

Recently, the latest version of CentOS 7.3 was released. All users of CentOS 7.0, 7.1 and 7.2 can upgrade their system to the most recent. This quick guide will explain...

How to Change your WordPress Username, Nickname and Display Name in MySQL
How to Change your WordPress Username, Nickname and Display Name in MySQL

After you create an account log in WordPress, you may want to change your WordPress username, as appropriate or due to security reason. However, you can not do this from...

How to Enable SSH Root Login on Ubuntu 16.04
How to Enable SSH Root Login on Ubuntu 16.04

As what we wrote in the previous article on how to allow SSH root on Ubuntu 14.04, after installing a fresh new copy of Ubuntu 16.04 LTS, we find that...

How to Change UUID of Linux Partition on CentOS 7
How to Change UUID of Linux Partition on CentOS 7

UUID (Universally Unique IDentifier) should be unique and it is used to identify storage devices on a linux system. If you cloned a virtual machine from vCenter, the metadata containing...

Leave a Reply

Your email address will not be published. Required fields are marked *