Index[A] [B] [C] [D] [E] [F] [G] [H] [I] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Z] open source firewalls operating systems filtering systems maintaining OPSEC LEA (Open Platform for Security - Logging Export API) OSI model application layer data link layer encapsulation process network layer physical layer presentation layer session layer transport layer OSPF (Open Shortest Path First) OUI (organizationally unique identifier) out-of-band management outbound access filtering on ISA Server 2nd OUTPUT chain filter table NAT table outside interfaces, configuring |