Information security – Access control or authentication – Network
Reexamination Certificate
2007-03-20
2007-03-20
Revak, Christopher (Department: 2131)
Information security
Access control or authentication
Network
C726S001000, C709S225000
Reexamination Certificate
active
10185920
ABSTRACT:
A screened subnet for interconnecting an intranet to the Internet includes first and second subnets. A first firewall provides a first level of protection to a portion of the first subnet and to the second subnet while a second firewall provides a second level of protection to the second subnet. A secured utility VLAN provides utility services for the portion of the first subnet and/or the second subnet. The secured utility VLAN is coupled to the screened subnet such that it enjoys an additional level of protection relative to the subnets and/or the portion thereof which it serves. In various embodiments thereof, the screened subnet is configured to include a single, shared, secured utility VLAN for servicing both the portion of the first subnet and the second subnet, or a pair of discrete secured utility VLANs for respectively servicing the portion of the first subnet and the second subnet.
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Boydstun Kenneth C.
Chen Jun
Marshall Stephen L.
Revak Christopher
Sprint Communications Company L.P.
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