????? Netstat ????????? ????? TCP

?????? ????????? ?????? ?????????
???? ???????: 137984 - ??? ???????? ???? ????? ????? ??? ???????.
????? ???? | ?? ????

?? ??? ??????

??????

???? ??? ??????? ????? ??????? TCP ????? ????? ??????? Netstat (NETSTAT.EXE).

??? ??? ???????? ?? TCP, ??? ?? ??? ????? ?????. ?????? TCP ????? ????? ????? (???? ?????? ??? ?????? ??? ?? RFC793 ????? 3: "??????? ???????").

??????? ????

???????? ????? TCP

???? ?????? ??? ???? ?? ????? ????? ??????? ???. ???? "??????" ?? ??? ?????? ?????? ??? ????? ??? "??????" ?????? ???? ?????. ???? ?? ??? ?????? ?? ???? ?????? ??????/?????? ?? ????? ?????????.

  1. ????? ?????

    • ???? ?????? ????? SYN ???? ????? ??? ?????? ??????? ?????? ??????? ????? ??? (ISN) ??? ?????? (??? ??????).
    • ???? ?????? ??? ???? SYN ? ACK (???? ????? ?? ISN ?????? + 1) ????? ??.
    • ???? ?????? ACK (???? ????? ?? ISN ?????? + 1).
  2. ????? Tear ????? (????? ????? ???? ????? ????? ???????).

    • ???? ?????? FIN (?????? ?????). ??? ???? ????? ????? ???. ?????? ?? ???? ?????? ???? ?? ???? ?????? ??? ???? ???????? ?? ??????. ??? ??????? ??? FIN ???? ???? ?????? ???? ????? ??????.
    • ???? ?????? ACK (??? ????? FIN ????? + 1)
    • ???? ?????? ????? ?? FIN.
    • ???? ?????? ACK (??? ????? FIN ?????? + 1). ??? ??????? ??? ACK ???? ?????? ?????? ???????.
???? ??????? ????? ????? ??? ????? ????? ???????? ????? ???? ???????? ??????. ???? ????????? ???? ??????? ??????? ????? ??????? ?? ??????? ??????? ???? ?? ??????? ??? 1 ??? ????? ??? ??????.

????? Netstat

???? ?????? ????? ??????? TCP ????? ?? ???? ???? ????? ??? ?????? TCP. ?? ?????? ????? ????? ???? ??????? ?????? ????? ?????? ???????? Netstat ????? ?? ???? "??????". ??? ????? Netstat ?? TCP/IP-32 ? Windows 95 ?? Windows NT ?? Windows for Workgroups.

???? ??????? ??? ?? ???? ?? Netstat:
????? ??????
------------ --------------------------------------------------------

SYN_SEND ???? ??? ??? ?????.

SYN_RECEIVED ???? ??? ???? SYN ?? ??????.

??????? ???? ???? SYN ?????? ?? ??? ????? ???? ?????.

LISTEN ???? ?????? ???? ?????.

??????: ???? ??????? ?????? listen() ???? ????? ????????. TCP ?? ???? ???? ??????? ?? ???? ??????? - ??? ??? ???? ???? ??? NETSTAT. ?????? ??? ???? ?? ?????????? ?????? ?????? ??????? ??????? ?? "????? ??????? ?? Microsoft:
134404??? NETSTAT.EXE ????? Sockets ????? TCP
FIN_WAIT_1 ????? ????? Indicates.

TIMED_WAIT ???? ???? ??? ?????? ??? ????? ?????.

CLOSE_WAIT ????? Indicates ??????. ???? ???? FIN ????? ??? ?? ????.

FIN_WAIT_2 ???? ??? ???? ????? FIN ????? ????? ?? ?? ??????.

LAST_ACK ??? Server ?? ??? ?????? ????? ???? FIN ?????? ??.

CLOSED ???? ???? ACK ?? ???? ?? ????? ???????.
??? ??????? ???? ??? ????????? ??????:

?? ????? ????? ???? ????? ???? Netstat ?????? ???? ??????? ?? ???? CLOSE_WAIT. ?? ???? ??? ??? ?????? ?????? ??????? (?? ????? FIN) ???? ???? ???? ?? ???? ??? ?????? ????? ?? ???? ??????? ???. ?? ???? ??? ????? ???? ???? (?? ??? ???? ?????? ??????? ?? ????????) ?? ??? ????? ???? ???????.

??????: ??? ?????? ???? ???? ????? ?? ???? TIME_WAIT ????? ????? ?? ?????. ????? ??????? ?? RFC793 ?? ????? ???? ???? ??? ????? (MSL). ??? ????? MSL ?? ???????. ???? ?? ???? ???? ????? ?? ???? TIME_WAIT ??????? ????? 4 ?????. ??? ????? ???????? ??? ?????? (??? ?? 2 ?????) MSL.

????? ??????:
  • "internetworking ?? TCP/IP ????? 1" ?????? Comer Douglas
  • "TCP/IP ????? ? ????? 1" ?????? Stevens ????.
  • "????? ?????????" ?????? Tanenbaum ????

???????

???? ???????: 137984 - ????? ??? ??????: 11/????/1424 - ??????: 3.0
????? ???
  • Microsoft Windows NT Workstation 3.5
  • Microsoft Windows NT Workstation 3.51
  • Microsoft Windows NT Server 3.5
  • Microsoft Windows NT Server 3.51
  • Microsoft TCP/IP for Windows for Workgroups 3.11
  • Microsoft Windows 95
????? ??????: 
kbmt KB137984 KbMtar
????? ????
???: ??? ????? ??? ?????? ???????? ?????? ????? ???? ????? ?????????? ????? ?? ????????? ?????? ????. ???? ???? ?????????? ???? ?? ???????? ???????? ?????? ????????? ????? ????????? ???????? ????? ???????? ?????? ?? ?????? ??? ?? ???????? ???????? ?? ????? ??????? ?????? ??? ??????? ?????? ??. ?????? ?? ???? ??? ??????? ???????? ????? ?? ???? ????? ?????? ??? ????? ??? ????? ??????? ?? ????? ?? ?????? ??? ??? ??????? ??????? ?? ????? ????? ????? ????? ?????. ?? ????? ???? ?????????? ??????? ??? ????? ?? ??????? ?? ????? ?????? ?? ??? ????? ?? ????? ??????? ?? ???????? ?? ??? ???????. ???? ???? ?????????? ???????? ??? ????? ?????? ??????? ??????
???? ??? ????? ??????? ?????? ??????????137984
????? ??????? ?? ????? ???? ?? ????? ???????
?? ????? ????? ?????? ???? ???? ???? ??? ??????? ??? ?? ? ?? ??? ??????? Microsoft ??? ????? ??? ??????? ????? ?????? ?????

????? ???????

 

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