Wednesday, September 12, 2012

How to disable IPV6 on RedHat 6.x and CentOS 6.x

Recommends not disabling the ipv6 module, as that can cause issues with SELinux and other components, but adding the following to /etc/sysctl.conf:

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1

To disable in the running system:
echo 1 > /proc/sys/net/ipv6/conf/all/disable_ipv6
echo 1 > /proc/sys/net/ipv6/conf/default/disable_ipv6

sysctl -w net.ipv6.conf.all.disable_ipv6=1
sysctl -w net.ipv6.conf.default.disable_ipv6=1

If problems with X forwarding are encountered on systems with IPv6 disabled, edit /etc/ssh/sshd_config and make either of the following changes:

(1) Change the line
#AddressFamily any

AddressFamily inet

(inet is ipv4 only; inet6 is ipv6 only)


(2) Remove the hash mark (#) in front of the line

Then restart ssh.

1 comment :

  1. Interesting blog all information are very important for me about the HP-UX environment and i really need it thank you.
    HP-UX environment