This article aims to assist you with disabling IPv6 on your server. If your server has broken IPv6 networking, this can lead to issues such as backup destination validation timeouts. You can work around these issues by disabling IPv6 on your server.
cPanel software support cannot make any modifications to your server's network on your behalf. It is recommended to have the steps mentioned in this article carried out by a system administrator.
To disable IPv6 on your server, run the following command via SSH as the root user:
echo 1 > /proc/sys/net/ipv6/conf/all/disable_ipv6
net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1
# sysctl -p
# vi /etc/ssh/sshd_config .... AddressFamily inet ....