Cable modems are a shared medium much like an Ethernet hub. Given the
filtering you describe it seems likely that your attacker would have to be
on the same shared segment as you. You could run a packet sniffer like
tcpdump to try and obtain the MAC address of the hacker (assuming that
hasn't been spoofed also). Armed with this info you should approach your
cable provider to stop the attacks.
Graham.
At 16:32 29/07/2000, you wrote:
> Hello all!
><SNIP>
> So this is the situation. Now for the questions:
>1) Am I correct in assuming that this spoof can only come from the ISP's
>network? If not, how does one route such requests?
>2) Does anyone have suggestions on how to counter such spoofs? Pointers to
>relevant websites are appreciated, and personal experiences are also welcome.
>
> CU O,
>
> Leonard.
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