PBS_Server: LOG_ERROR::is_request, bad attempt to connect from 192.168.1.1:1023 (address not trusted - check entry in server_priv/nodes
As the log says, there is some issue in the server_priv configuration. If all your nodes are working well except that, you should take a look at the client settings. Maybe your server_priv has the wrong configration.
Once you have cleared the error, just fire off the command
# pbsnodes -c node_name