Method for protecting a firewall load balancer from a denial of service attack
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United States of America Patent
Stats
-
Oct 31, 2006
Issued Date -
N/A
app pub date -
Feb 19, 2001
filing date -
Dec 29, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method for protecting firewall load balancers from a denial of service attack is provided. Packets are received by the firewall load balancer. Each packet has a source and a destination. The firewall load balancer is equipped with a connection database that can contain entries about the packets. Upon receipt of a packet, the connection database is queried to determine whether or not there is an entry for the received packet. If an entry is found in the database, the packet is forwarded to its destination. Otherwise, if the packet was received from a firewall, then a new connection entry for the packet is built and is saved to the connection database and the packet is forwarded on to its destination. If the packet does not have an entry (match) in the connection database and the packet was not received from a firewall, then the packet is forwarded to a firewall.
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