Server denial of service shield

A data processing system in a first server data processing system for responding to a denial of service attack from a client, the data processing system comprising:

• detecting means for detecting an occurrence of the denial of service attack from the client in which credentials are presented to the first server data processing system by the client wherein the denial of service attack comprises sending invalid credentials to a server to consume resources of the server;
• blocking means, responsive to detecting the occurrence of the denial of service attack, for blocking connections from the client to the first server data processing system;
• replaying means, responsive to detecting the occurrence of the denial of service attack, for replaying an instance of the denial of service attack to a second server data processing system;
• and
• sending means, responsive to a failure of the instance of the denial of service attack on the second server data processing system, for sending a command to the second server data processing system to block connections from the client.

A computer program product in a computer readable medium in a first server data processing system for responding to a denial of service attack from a client, the computer program product comprising:

• first instructions for detecting an occurrence of the denial of service attack from the client in which credentials are presented to the first server data processing system by the client wherein the denial of service attack comprises sending invalid credentials to a server to consume resources of the server;
• second instructions, responsive to detecting the occurrence of the denial of service attack, for blocking connections from the client to the first server data processing system;
• third instructions, responsive to detecting the occurrence of the denial of service attack, for replaying an instance of the denial of service attack to a second server data processing system;
• and
• fourth instructions, responsive to a failure of the instance of the denial of service attack on the second server data processing system, for sending a command to the second server data processing system to block connections from the client.

A data processing system comprising:

• a bus system;
• a memory connected to the bus system, wherein the memory includes a set of instructions;
• and a processing unit connected to the bus system, wherein the processing unit executes a set of instructions to detect an occurrence of a denial of service attack from a client in which credentials are presented to a first server data processing system by the client, wherein the denial of service attack comprises sending invalid credentials to a server to consumer resources of the server;
• block connections from the client to the first server data processing system, in response to detecting the occurrence of the denial of service attack;
• replay an instance of the denial of service attack to a second server data processing system, in response to detecting the occurrence of the denial of service attack;
• and send a command to the second server data processing system to block connections from the client, in response to a failure of the instance of the denial of service attack on the second server data processing system.