[LUNI] Re: Cablemodem Discussion (Was: DHCP host name - COMCAST - cable modem)

[Gregg Sperling]

Per the request of three recently received emails -- message resent in 
plaintext -- sorry about the HTML.

Yes, it is intended.  According to one of the field techs (a guy with whom 
I recently spoke and apparently had a clue) they said that people were 
NAT'ing their one IP address, so it didn't matter anyways.  They'd rather 
have the "unknowing" people just directly connect their computers to the 
cablemodem without going through the trouble of setting up one of the 
Linksys boxes (or worse, a secure Linux firewall) so they could track the 
individual computer usage, and "investigate their connected machines as 
necessary."   I asked him to elaborate on the last comment, he just smiled 
and chuckled.

This brings up another interesting point -- back when home.com was around, 
there was an address that would pop up from time-to-time.  It resolved 
to:  "AUTHORIZED-SCAN1.home.com" and was something like 24.0.0.100 or some 
real low IP address.  This particular address scanned one of the firewalls 
that I maintain, and did some pretty interesting stuff, including what 
appeared to be nmap-style X-mas tree scanning, random port scanning, and 
time-delay port scanning (like scanning 10 ports at a time over a period of 
72 hours or something like that.)   Maybe they're still doing scanning of 
customer systems.    What really interested me was that the 
authorized-scan1.home.com would constantly scan for open port 119 
(nntp).  When I asked about this (way back when) I was told that home.com 
was allowed to do so, and that they wanted to make sure customers weren't 
running NNTP servers!

Gregg


At 08:10 AM 6/30/2003 -0500, you wrote:
Thanks for the info - somehow I thought I had forgotten a company but I 
couldn't remember ....
>
>Is that intended? Originally (whatever that means ...) I thought one 
>needed to pay extra for more than
>one IP address.
>
>Thanks.
>
>StvB
>
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