Andrew Meyer via FreeIPA-users wrote:

> I am building out a new IPA server environment and I am getting the following error:

> [user@freeipa001 ~]$ sudo ipa-server-install --setup-dns --setup-kra --setup-adtrust --auto-reverse --ssh-trust-dns --auto-forwarders --allow-zone-overlap

> IPv6 stack has to be enabled in the kernel and some interface has to have ::1 address assigned. Typically this is 'lo' interface. If you do not wish to use IPv6 globally, disable it on the specific interfaces in sysctl.conf except 'lo' interface.

> The ipa-server-install command failed. See /var/log/ipaserver-install.log for more information

> [user@freeipa001 ~]$

> [root@freeipa001 ~]# sudo sysctl -w net.ipv6.conf.lo.disable_ipv6=0

> sysctl: cannot stat /proc/sys/net/ipv6/conf/lo/disable_ipv6: No such file or directory

> [root@freeipa001 ~]#

> I am using the latest CentOS 8

IPA is looking to ensure that /proc/net/if_inet6 exists. It is

apparently missing on your system indicating that IPv6 support is not

enabled in the kernel.

rob