×

State machine for accessing a stealth firewall

  • US 7,207,061 B2
  • Filed: 08/31/2001
  • Issued: 04/17/2007
  • Est. Priority Date: 08/31/2001
  • Status: Active Grant
First Claim
Patent Images

1. A stealth firewall comprising:

  • a first network interface to an external network;

    a second network interface to an internal network;

    a packet filter for restricting access to said internal network; and

    ,a state machine pre-configured to transition across a plurality of internal states, from a restricting state to an access state, conditioned upon receiving a plurality of requests to access said internal network, said plurality of requests collectively comprising a code for causing said state machine to transition from said restricting state to said access state which causes said packet filter to permit access to said internal network, whereinsaid packet filter not responding to said external network upon receiving any request from said external network to access said internal network when said state machine in said restricting state.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×