How to disable IPv6 in RHEL 5 Linux

Why you need to disable IPv6 in RHEL 5?

In Red Hat Enterprise 5 Linux internet protocol version 6 (IPv6) module is turned on by default and if your network is not ready to run IPv6 then you need to turn it off on your Linux server. When I first installed my Red Hat enterprise 5 server i noticed strange IPv6 error messages in /var/log/messages file.

Here is how i turned IPv6 on my Red Hat Enterprise Linux 5 (RHEL5) machine.

Steps to disabled IPv6 on RHEL 5:

1. In Fedora or RHEL5 Linux modules are loaded using /etc/modprobe.conf file, open the modprobe.conf file using your friendly editor vi or pico and add these line to disable autloading of IPv6 module

2. Next in your global network configuration file edit the IPv6 option using your root login session:

Change following option to NO:

3. To turn off the IPv6 tables immediately run Linux service command to disable the IPv6 service

4. For permanently disabling the ip6tables using chkconfig command so it wouldn’t start during next Linux reboot

Using these steps I was able to successfully turn of IPv6 on my RHEL5 Linux machine. If you want to turn off IPv6 on your RHEL 5 or Fedora machines you can disable it by following these steps.

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Tagged as: IPv6, Linux, RHEL 5