This howto will show you how to disable ipv6 on RHEL 6/7, CentOS 6 and CentOS7. IPv6 is enabled by default. In this article I summarize 3 configuration which needs to be changed to completely disable ipv6. Check the configuration of the existing network with the “ifconfig” command. If inet6 appears in the configuration, means IPv6 is enabled. Here are details on how to disable IPv6 on Redhat / CentOS 6 / CentOS 7 : 1. Update /etc/sysctl.conf : Method 1 : # vi /etc/sysctl.conf Add the following : net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 Run the following command to
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