tcp.4: undocument compressed TIME_WAIT
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@ -753,23 +753,6 @@ A value of 2 results in any
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packets to closed ports being logged.
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packets to closed ports being logged.
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Any value not listed above disables the logging
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Any value not listed above disables the logging
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(default is 0, i.e., the logging is disabled).
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(default is 0, i.e., the logging is disabled).
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.It Va maxtcptw
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When a TCP connection enters the
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.Dv TIME_WAIT
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state, its associated socket structure is freed, since it is of
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negligible size and use, and a new structure is allocated to contain a
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minimal amount of information necessary for sustaining a connection in
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this state, called the compressed TCP
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.Dv TIME_WAIT
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state.
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Since this structure is smaller than a socket structure, it can save
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a significant amount of system memory.
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The
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.Va net.inet.tcp.maxtcptw
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MIB variable controls the maximum number of these structures allocated.
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By default, it is initialized to
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.Va kern.ipc.maxsockets
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/ 5.
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.It Va minmss
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.It Va minmss
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Minimum TCP Maximum Segment Size; used to prevent a denial of service attack
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Minimum TCP Maximum Segment Size; used to prevent a denial of service attack
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from an unreasonably low MSS.
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from an unreasonably low MSS.
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@ -786,7 +769,7 @@ application limited and the network bandwidth is not utilized completely.
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That prevents self-inflicted packet losses once the application starts to
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That prevents self-inflicted packet losses once the application starts to
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transmit data at a higher speed.
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transmit data at a higher speed.
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.It Va nolocaltimewait
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.It Va nolocaltimewait
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Suppress creation of compressed TCP
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Suppress creation of TCP
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.Dv TIME_WAIT
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.Dv TIME_WAIT
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states for connections in
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states for connections in
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which both endpoints are local.
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which both endpoints are local.
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