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SNMP script for Linksys

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    SNMP script for Linksys

    Sounds neat.
    Since the viruses hit about a year ago, my cable modem's ACTIVITY LED blinks a lot, as do the WAN lights on my Linksys router. It is said that much of this is ARP packets passing through the DOCSIS cable modem (since it seems to act like a dumb bridge). THere are occasional IP packets thrown in too.

    I wonder if there's a way to see what IP is throwing all of the ARP packets, given I don't have a sniffer and I don't wish to connect my PC directly to the cable modem. I suppose I could connect my laptop to the cable modem, temporarily, and use some sniffer software (freeware). About all I could do is email my cable modem company with a list of the offenders which are their customers (I hear this is mostly coming from on-net PCs with infected Microsoft IIS running).

    #2
    Have you tried Ethereal? It free and available at http://www.ethereal.com. I used it to prove my ISP's DHCP server wasn't sending a DHCP offer to my DHCP discover. They finally confessed that their DHCP server was averaging 100% CPU and new hardware was on order. It caputured a lot of ARP traffic.

    I used the Linux version, but it looks like they have a Windows version too.

    Regards,
    Ultrajones
    Plug-ins: UltraMon, UltraM1G, UltraCID, Ultra1Wire, UltraLog, UltraWeatherBug, UltraPioneerAVR, UltraGCIR

    Comment


      #3
      UltraJones:
      Thanks for this nice work. It it populating the database with log entries ok, but I did get an error in ah.log as shown below. This did not appear to coincide with any particular activity. I have MDAC 2.7 installed. Is that a problem?
      Thanks

      2/11/2003 9:31:12 PM~!~UltraSNMP Error~!~An unexpected error occured in the Winsock1_Error function/subroutine: [10036 - A blocking winsock operation is in progress]

      WindowsXPhe on Compaq5300 (1.1Ghz)
      512 Mb, on-board audio, Way2Call usb 1.08.12
      TI103, MR26A
      HS 1.6.41, HSP 2.0.51

      Comment


        #4
        <BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by JonathanP:
        UltraJones:
        Thanks for this nice work. It it populating the database with log entries ok, but I did get an error in ah.log as shown below. This did not appear to coincide with any particular activity. I have MDAC 2.7 installed. Is that a problem?
        Thanks

        2/11/2003 9:31:12 PM~!~UltraSNMP Error~!~An unexpected error occured in the Winsock1_Error function/subroutine: [10036 - A blocking winsock operation is in progress]

        WindowsXPhe on Compaq5300 (1.1Ghz)
        512 Mb, on-board audio, Way2Call usb 1.08.12
        TI103, MR26A
        HS 1.6.41, HSP 2.0.51<HR></BLOCKQUOTE>

        Don't know why this error occurs and it is NOT related to your MDAC version. Let me know if you see any more than one per day.

        Regards,
        Ultrajones
        Plug-ins: UltraMon, UltraM1G, UltraCID, Ultra1Wire, UltraLog, UltraWeatherBug, UltraPioneerAVR, UltraGCIR

        Comment


          #5
          I wonder what would cause this winsock error? I have a new plugin for HS and ever since, I get a boat load of winsock errors and eventually HS exits by itself with no errors left on the screen.

          Thanks,

          Simon

          Comment


            #6
            Stevech, ARP is an inherent protocol used by every TCP/IP device if it does not have information about what devices are on the local network. A system will broadcast an ARP query to all local systems asking the device to respond that has the link layer address (sometimes called a MAC address) they want to talk to. You will always see ARP packets on Ethernet LANs.

            See this for more in-depth info: http://linux-ip.net/html/ether-arp.html
            |
            | - Gordon

            "I'm a Man, but I can change, if I have to, I guess." - Man's Prayer, Possum Lodge, The Red Green Show
            http://HiddenGemTech.com - http://MaineMusiciansExchange.org - http://www.WJZF.org

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