FreeRadius default config file /etc/raddb/clients.conf with less comments

clients.conf

## clients.conf -- client configuration directives
#######################################################################
client localhost {
        ipaddr = 127.0.0.1
        proto = *
        secret = testing123
        require_message_authenticator = no
        nas_type         = other        # localhost isn't usually a NAS...
        limit {
                max_connections = 16
                lifetime = 0
                idle_timeout = 30
        }
}

# IPv6 Client
client localhost_ipv6 {
        ipv6addr        = ::1
        secret          = testing123
}

# All IPv6 Site-local clients
#client sitelocal_ipv6 {
#       ipv6addr        = fe80::/16
#       secret          = testing123
#}

#client example.org {
#       ipaddr          = radius.example.org
#       secret          = testing123
#}

#
#client private-network-1 {
#       ipaddr          = 192.0.2.0/24
#       secret          = testing123-1
#}

#client private-network-2 {
#       ipaddr          = 198.51.100.0/24
#       secret          = testing123-2
#}

#clients per_socket_clients {
#       client socket_client {
#               ipaddr = 192.0.2.4
#               secret = testing123
#       }
#}