IPv6 – SudoAll.com

Disabling IPv6, breaks SSH X11 Forwarding in Linux CENTOS and UBUNTU all versions

Posted on December 29, 2013 by admin

This was a weird one. It took me ages to discover why SSH X11 died at some point after tuning a box. It so happens that disabling IPv6 ( not used on my networks) is assumed in SSH at some point and if you disable it (which many people say is a way to avoid…

Disable IPv6 in centOS

Posted on September 13, 2012December 29, 2013 by admin

Edit /etc/sysconfig/network and set “NETWORKING_IPV6” to “no” For 5.4 and later, replace in /etc/modprobe.conf alias ipv6 off by options ipv6 disable=1 Alternative (which might be easier and works on any release with /etc/modprobe.d): # touch /etc/modprobe.d/disable-ipv6.conf # echo "install ipv6 /bin/true" >> /etc/modprobe.d/disable-ipv6.conf For CentOS 5.3 or older, add the following to /etc/modprobe.conf :…