US 12,267,327 B2
Methods and systems for IP-based network intrusion detection and prevention
Bradley Scott Will, Marriottsville, MD (US); and Michael John Serafino, Omaha, NE (US)
Assigned to CHARLES SCHWAB & CO., INC., San Francisco, CA (US)
Filed by TD Ameritrade IP Company, Inc., Omaha, NE (US)
Filed on Aug. 22, 2022, as Appl. No. 17/892,207.
Application 17/892,207 is a continuation of application No. 16/589,028, filed on Sep. 30, 2019, granted, now 11,477,200.
Prior Publication US 2022/0407858 A1, Dec. 22, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 9/40 (2022.01)
CPC H04L 63/101 (2013.01) [H04L 63/0876 (2013.01); H04L 63/108 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
at least one processor; and
at least one memory, wherein the memory stores a store of credentials for a set of users, an event cache, and a block list;
the at least one memory configured to, with the at least one processor, cause the system to perform, in response to receiving an authentication request from a requestor address,
determining whether credentials of the authentication request are present in the store of credentials,
transmitting an authentication failure response to the requestor address if the credentials are not present in the store of credentials,
determining whether the requestor address is present in the block list if the credentials are present in the store of credentials,
transmitting an authentication success response to the requestor address if the requestor address is not present in the block list, and
selectively transmitting the authentication success response to the requestor address if the requestor address is present in the block list.