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Firewall system for quality of service management

  • US 6,341,309 B1
  • Filed: 12/24/1997
  • Issued: 01/22/2002
  • Est. Priority Date: 05/27/1997
  • Status: Expired due to Term
First Claim
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1. A system for monitoring quality of service within a network of computers, said system comprising:

  • a plurality of computers coupled to form an internal network of computers;

    a firewall server comprising a firewall program coupled to at least one of said plurality of computers and coupled to an outgoing line to a wide area network of computers, said firewall server being configured to receive a connection request, estimate a bit rate over a round-trip-time between said at least one of said plurality of computers and the wide area network of computers, receive a receive acknowledgment signal at said at least one of said plurality of computers, delay transmission of a receive acknowledgment signal when the bit rate is greater than a bit rate limit, and transmit the receive acknowledgment signal over the outgoing line when the bit rate is not greater than the bit rate limit; and

    a bandwidth management tool coupled to said firewall server, said bandwidth management tool being capable of monitoring and managing incoming and outgoing information to and from said firewall server by classifying the connection request received at said firewall server into a traffic class from a plurality of traffic classes, determining a minimum bandwidth for said plurality of traffic classes, determining a maximum latency for said plurality of traffic classes, and dynamically allocating bandwidth to the connection request based on the traffic class into which the connection request is classified, said traffic class having a minimum bandwidth and/or a maximum latency, and the total traffic on the system.

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