CentOS6.9(freenx-server)+CentOS7(freeipa) how to make it work?

Question

CentOS

In general, the essence of the question is, there is a CentOS6.9 terminal server (freenx-server) I connect to it through NoMachine, everything works fine, but as a terminal server I add it to the CentOS7 (freeipa) domain, I can’t log in through NoMachine, it says "Authentication error, try again once."
On the terminal server /etc/nxserver/node.conf
ENABLE_SSH_AUTHENTICATION="1"
NX_LOG_LEVEL=4
ENABLE_AUTORECONNECT="1"
EXPORT_USERIP="1"
FreeIPA 4.4 default settings
can someone come across such a problem or can direct in the right direction ...

Answer 1

In general, I myself did not fully figure out what the problem was, so I realized that this was some kind of bug, but this link helped me here https://www.redhat.com/archives/freeipa-users/2013...
did the following
#nano /etc/ssh/ssh_config commented
in it:
> GlobalKnownHostsFile /var/lib/sss/pubconf/known_hosts
> PubkeyAuthentication yes
> ProxyCommand /usr/bin/sss_ssh_knownhostsproxy -p %p %h
#service sshd restart
And it worked!! !