The connection-limiting options are available for TCP Listeners only.
To prevent various Denial of Service (DoS) attacks you may want to limit the number of connections a Listener can accept (on all sockets) from the same IP address:
The Non-Client setting applies only to the TCP connections from Network IP Addresses not included into the Client IP Addresses list. This setting value should be equal or smaller than the main Limit Connections setting value.
When you set these settings, you should remember that:
Note: to avoid problems with inter-server communication, this setting has no effect on connections that come from other Servers in the same CommuniGate Pro Cluster.