Professional Web Applications Themes

Tcpdump and UDP request from ISP - Mac Networking

Tcpdump show that my ISP sent an UDP request every 1/20 second: 07:37:00.811440 modemcable055.241-200-24.mc.videotron.ca.tivoconnect > 239.192.15.205.15205: udp 1452 So I can't test anything with tcpdump. Is there any way to stop these UDP request from my BEFSR41 SysLink router ?...

  1. #1

    Default Tcpdump and UDP request from ISP

    Tcpdump show that my ISP sent an UDP request every 1/20 second:

    07:37:00.811440 modemcable055.241-200-24.mc.videotron.ca.tivoconnect >
    239.192.15.205.15205: udp 1452

    So I can't test anything with tcpdump.
    Is there any way to stop these UDP request from my BEFSR41 SysLink router ?
    Alain Guest

  2. #2

    Default Re: Tcpdump and UDP request from ISP

    ca (Alain Birtz) wrote:
     
    ^^^^^^^^^^^

    You're on a cable service?
    Is it looking for your videomachine?
    or your neighbors?
    Peter Guest

  3. #3

    Default Re: Tcpdump and UDP request from ISP

    YES. Cable for TV and Internet.
    Is it possible to stop it from my BEFSR41B LinkSys routeur ?

    In article <auckland.ac.nz>, Peter KERR
    <domain> wrote:
     
    > ^^^^^^^^^^^
    >
    > You're on a cable service?
    > Is it looking for your videomachine?
    > or your neighbors?[/ref]
    Alain Guest

  4. #4

    Default Re: Tcpdump and UDP request from ISP

    On 2003-11-07, Alain Birtz <ca> wrote: 

    Is your problem simply that you don't want to see all these udp
    packets in tcpdump? That's an easy one:

    tcpdump not udp port tivoconnect



     

    Is 24.200.241.55 your router's address? Your Mac's address? You have
    a tivo connected to your router? It's address is 239.192.15.205?

    Say more about your configuration and exactly what you're trying to
    do.



    Hugh Guest

  5. #5

    Default Re: Tcpdump and UDP request from ISP

    How can I check if 24.200.241.55 is my router's address ?

    No tivo connected.

    G4 400mhz. Cable modem: Samsung SCM-110 R. Router: BEFSR41 SysLink

    I wish my SysLink router filter (does not report) all such UDP request.

    I also get this request from my ISP (1 for about 100 UDP request)

    10:31:01.724073 dns3.videotron.net.domain > 192.168.1.3.49362: 32230*
    1/4/3 PTR[|domain] (DF)

    192.168.1.3 is my Mac local address


    In article <fXqrb.151394$HS4.1233320attbi_s01>, Hugh Wolf
    <lieder.de> wrote:
     
    >
    > Is your problem simply that you don't want to see all these udp
    > packets in tcpdump? That's an easy one:
    >
    > tcpdump not udp port tivoconnect
    >
    >
    >

    >
    > Is 24.200.241.55 your router's address? Your Mac's address? You have
    > a tivo connected to your router? It's address is 239.192.15.205?
    >
    > Say more about your configuration and exactly what you're trying to
    > do.[/ref]
    Alain Guest

  6. #6

    Default Re: Tcpdump and UDP request from ISP

    On 2003-11-10, Alain Birtz <ca> wrote: 

    I don't use a LinkSys router (I have a Netgear), but you should be
    able find out from its web interface what its current wan address is.

    As for the tivo udp packets, I can't imagine why you'd be seeing them
    on the Mac, given that its neither the sender nor the receiver.

     

    SysLink? Or LinkSys?

     

    This is your Mac doing hostname lookup, or rather a response to such a
    lookup. It's normal, though maybe slightly surprising that the Mac is
    talking directly to a videotron.net server rather than treating the
    router itself as the (indirect) name server.




    Hugh Guest

Similar Threads

  1. tcpdump install issues
    By FreeBSD in forum FreeBSD
    Replies: 2
    Last Post: February 28th, 10:51 AM
  2. Replies: 1
    Last Post: July 29th, 05:27 AM
  3. weird tcpdump dependency on libaviplaydha
    By martin f krafft in forum Debian
    Replies: 6
    Last Post: July 11th, 06:30 AM
  4. Replies: 2
    Last Post: July 4th, 12:12 PM
  5. tcpdump and libcap on AIX 4.3
    By Shaun Clowes in forum AIX
    Replies: 0
    Last Post: June 29th, 11:12 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139