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Thread: udp packets necessary for wifi connection

  1. #1
    colorpurple
    Guest

    udp packets necessary for wifi connection

    RULE:'DNS': PERMIT: In UDP, 172.16.0.1:1900->Loc:1900, OWNER:
    C:\WINSYS\SVCHOST.EXE
    RULE:'DNS': PERMIT: In UDP, 172.16.0.1:1900->Loc:1900, OWNER:
    C:\WINSYS\SVCHOST.EXE
    RULE:'DNS': PERMIT: In UDP, 172.16.0.1:1900->Loc:1900, OWNER:
    C:\WINSYS\SVCHOST.EXE
    RULE:'DNS': PERMIT: In UDP, 172.16.0.186:54605->Loc:2223, OWNER: no owner
    RULE:'DNS': PERMIT: In UDP, 172.16.0.186:54605->Loc:2223, OWNER: no owner


    On a XP system, public access AP, I am receiving floods of these
    incoming UDP packets. If I block port 1900, I lose my assigned IP and
    cannot reconnect. On another system windows 98SE, if I block port 1900,
    no problem, stay connected.

    Anyone know what the purpose of these incoming UDP packets is? They are
    being sent by the gateway/dns server..

  2. #2
    LR
    Guest

    Re: udp packets necessary for wifi connection

    On 16/10/2009 22:16, colorpurple wrote:
    > RULE:'DNS': PERMIT: In UDP, 172.16.0.1:1900->Loc:1900, OWNER:
    > C:\WINSYS\SVCHOST.EXE
    > RULE:'DNS': PERMIT: In UDP, 172.16.0.1:1900->Loc:1900, OWNER:
    > C:\WINSYS\SVCHOST.EXE
    > RULE:'DNS': PERMIT: In UDP, 172.16.0.1:1900->Loc:1900, OWNER:
    > C:\WINSYS\SVCHOST.EXE
    > RULE:'DNS': PERMIT: In UDP, 172.16.0.186:54605->Loc:2223, OWNER: no owner
    > RULE:'DNS': PERMIT: In UDP, 172.16.0.186:54605->Loc:2223, OWNER: no owner
    >
    >
    > On a XP system, public access AP, I am receiving floods of these
    > incoming UDP packets. If I block port 1900, I lose my assigned IP and
    > cannot reconnect. On another system windows 98SE, if I block port 1900,
    > no problem, stay connected.
    >
    > Anyone know what the purpose of these incoming UDP packets is? They are
    > being sent by the gateway/dns server..

    Port 1900 is normally used for SSDP.
    <http://en.wikipedia.org/wiki/Simple_Service_Discovery_Protocol>
    It is part of UPnP and will be included in XP as standard. Your Win 98SE
    machine does not have it has standard and it will only be included if
    you have perhaps included the "ICS Client" from XP.
    You could try disabling the UPnp Service on your XP machine and see if
    it will connect to the AP with port 1900 blocked.
    I would guess, not certain, that port 54605 is used as an alternative
    for M-SEARCH messages.
    "SEARCHPORT.UPNP.ORG
    OPTIONAL. If a device does not send the SEARCHPORT.UPNP.ORG header
    field, it MUST respond to unicast M-SEARCH messages on port 1900. Only
    if port 1900 is unavailable MAY a device select a different port to
    respond to unicast M-SEARCH messages. If a device sends the
    SEARCHPORT.UPNP.ORG header field, its field value MUST be an ASCII
    encoded integer, decimal, without leading zeros (leading zeroes, if
    present, MUST be ignored by the recipient), in the range 49152-65535
    (RFC 4340). The device MUST respond to unicast M-SEARCH messages that
    are sent to the advertised port."
    <http://www.upnp.org/specs/arch/UPnP-arch-DeviceArchitecture-v1.1.pdf>

  3. #3
    DevilsPGD
    Guest

    Re: udp packets necessary for wifi connection

    In message <hbans2$h9i$1@aioe.org> colorpurple <colorpurple_not@msn.com>
    was claimed to have wrote:

    >RULE:'DNS': PERMIT: In UDP, 172.16.0.1:1900->Loc:1900, OWNER:
    >C:\WINSYS\SVCHOST.EXE
    >RULE:'DNS': PERMIT: In UDP, 172.16.0.1:1900->Loc:1900, OWNER:
    >C:\WINSYS\SVCHOST.EXE
    >RULE:'DNS': PERMIT: In UDP, 172.16.0.1:1900->Loc:1900, OWNER:
    >C:\WINSYS\SVCHOST.EXE
    >RULE:'DNS': PERMIT: In UDP, 172.16.0.186:54605->Loc:2223, OWNER: no owner
    >RULE:'DNS': PERMIT: In UDP, 172.16.0.186:54605->Loc:2223, OWNER: no owner
    >
    >
    >On a XP system, public access AP, I am receiving floods of these
    >incoming UDP packets. If I block port 1900, I lose my assigned IP and
    >cannot reconnect. On another system windows 98SE, if I block port 1900,
    >no problem, stay connected.
    >
    >Anyone know what the purpose of these incoming UDP packets is? They are
    >being sent by the gateway/dns server..


    Port 1900 is uPNP, it shouldn't be required in most cases unless you're
    using uPNP, but I've seen weirder things.

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