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10-10-2007, 11:54 door SirDice

en als laatste "Black Hole Router" detectie. Nieuw?!? Dat zat er al in... EnablePMTUBHDetect Key: TcpipParameters Value Type: REG_DWORD - Boolean Valid Range: 0,1 (False, True) Default: 0 (False) Description: If you set this parameter to 1 (True), TCP tries to detect "Black Hole" routers while doing Path MTU Discovery. A "Black Hole" router does not return ICMP Destination Unreachable messages when it must fragment an IP datagram with the Don't Fragment bit set. TCP must receive these messages to perform Path MTU Discovery. With this feature enabled, TCP will try to send segments without the Don't Fragment bit set if several retransmissions of a segment are unacknowledged. If the segment is acknowledged, the MSS will be decreased and the Don't Fragment bit will be set in future packets on the connection. Enabling black hole detection increases the maximum number of retransmissions that are performed for a particular segment. http://support.microsoft.com/?scid=kb;en-us;Q314053

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