ftps://192.168.5.228sftp://192.168.5.228
# cp -a /etc/webmin/minisserv.conf /etc/webmin/miniserv.conf.back
# vi /etc/webmin/miniserv.conf
nano /etc/selinux/config
nano /etc/webmin/miniserv.conf
worked fine. But after changing ssl needed to restart webmin:
/etc/init. d/webmin stop
/etc/init. d/webmin start
then it worked
/etc/rc.d/init.d/webmin stop
systemctl start webmin
/etc/rc.d/init.d/webmin start