Re: Who is my router talking to?

Steven Kurylo wrote:
>> Some cablemodems have built-in DHCP servers, although I've not yet
>> figured out what the purpose is. They typically use an IP address of
>> 192.168.100.1, and hand out IPs like that. The DHCP server is generally
>> only active when the modem is offline and hasn't yet picked up its
>> configuration from the cable company. Nothing to be particularly
>> worried about.
>
> This is the magic answer. The shaw modems, when they can't sync to
> the head end, run their own DHCP server on 192.168.100.1.

So it seems, though I'm still not clear on why this is "feature". An
http request to that IP instantly yields a response with a blank page. A
portscan shows only:
        67/tcp filtered dhcps
        80/tcp open http

Thanks all for the education!!
        Les...
Received on Tue Jun 19 15:44:30 2007