Controlling Access from Client Computers
Use the Client Host Access Control pane to control which client computers have access to the server. These settings apply to all users of the client computer. You can use either domain names or IP addresses to specify hosts. For either, you can use regular expressions to specify an expression that matches one or more hosts.
You can allow or deny access, or use a combination of allow and deny. For information about how the server handles allow and deny rules, see Using Allow and Deny Rules for Access Control.
In the following configuration, access to client hosts with an IP address that begins with 123.156.78 is denied — users on any other client host are allowed access.
In the following configuration, access to all hosts in the acme.com domain is allowed, except badpc — clients from any other domain are denied access.
The following configuration denies access to all hosts in the acme.com domain, including mypc — clients from any other domain are allowed access.
Note: Without the final line, no clients would be allowed access. This is because once any client is added to the Allow list, clients are allowed access only if they match an allowed expression.