How to Disable IPv6 on RHEL-5

Question

I am trying to disable IPv6 on interface eth0 on RHEL 5.

Here is a description of what I have attempted.

I had already made following entries in ifcfg-eth0 :

IPv6INIT=NO

IPV6AUTOCONF=NO
Following entries were made in /etc/modprob.conf" :

alias net-pf-10 off

alias ipv6 off
These entries in /etc/sysconfig/network :

IPV6INIT=NO

NETWORKING_IPV6=NO
This line is added to /etc/modprobe.d/blaclist :

blacklist ipv6

Also I did one more in /etc/sysctl.conf :

`net.ipv6.conf.all.autoconf = 0`        
`net.ipv6.conf.accept_ra = 0`

After performing each of the above mentioned steps, I restarted n/w service and even rebooted my machine.

But when I check ifconfig, it is still showing IPv6 address on interface.

Reference : How to disable ipv6 in Linux Mint

Note : - I am more a CCNA/CCNP guy and new on linux.

Please check that /etc/modprob.conf and /etc/modprobe.d/blaclist are only typos in your question and not on your machine. It would explain why it doesn't work otherwise ;-)
@ Sander Steffann i am not getting you actually what you try to indicate...
You have typos in your question: the mentioned filenames should be: /etc/modprobe.conf and /etc/modprobe.d/blacklist. If you actually used the wrong filenames then of course it won't work...
Yes this is mistake with typing in question. Actually "/etc/modprobe.conf" is right file, in which i made that changes.

slhck · Answer 1 · 2013-01-07 13:45:21Z

up vote 0 down vote

Try disabling the IPv6 services with:

chkconfig ip6tables off

edited Jan 7 at 13:45

slhck♦
55.7k1089148

answered Jan 7 at 13:43

parkydr
1,152117

	That disables the IPv6 firewall, not the protocol! – Sander Steffann Jan 7 at 20:09
	That was the only difference in the set of commands I was given to disable IPv6. It worked for me (RHEL 5.4). – parkydr Jan 7 at 21:30
	I have already disabled ip6tabels – navneet shamra Jan 8 at 12:15

1 Answer