By using the operational affinity algorithm for load balancing, you can ensure that the same data source always responds to bind requests from a given client. In this way, you can ensure that a client is locked out after the maximum number of failed bind attempts. If the same data source does not respond to bind requests from a given client, the client can exceed the maximum number of failed bind attempts.
When a client binds, a hash value for the request is allocated according to the bind credentials. Directory Proxy Server consults the hash table and distributes the request to the data source for that hash value. No matter how many times the client binds, the hash value is always the same. The request is always distributed to the same data source.
If a client requests a bind without the appropriate credentials, the data source rejects the bind request. If the client makes a second or third bind request, the same data source rejects the bind request. When the client exceeds the maximum number of allowed bind attempts, Directory Server locks the client out.
For an example of how configure the operational affinity algorithm for global account lockout, see To Configure the Operational Affinity Algorithm for Global Account Lockout in Sun Directory Server Enterprise Edition 7.0 Administration Guide.