Linux disable ipv6

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It's possible to simpy disable ipv6 if you have any issues , but it's more preferred to to set the precedence to ipv4 instead of mostly systems default ipv6 protocol. See details: http://wiki.vpsget.com/index.php/Prefer_IPv4_over_ipv6_._How_to_set_ipv4_precedence


To disable ipv6 edit file /etc/sysctl.conf, 

 vi /etc/sysctl.conf

Add the following lines: 

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

Save and apply settings: 

sysctl -p

You may also simply run these commands: 

echo 1 > /proc/sys/net/ipv6/conf/all/disable_ipv6
echo 1 > /proc/sys/net/ipv6/conf/default/disable_ipv6

Or 

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

This should work on mostly all linux related distros . Tested on Centos and Ubuntu.


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