Re: cable "modems" and security

[Charles Menzes <charles@lunarmedia.net>]

well, actually since cable modems and dsl bridge to traditional arpa
encapsulated ethernet, DHCP *should* be used by most of the ISPs/Cable
Companies offering the service. Nevertheless, since it is shared media,
there a a good deal of security concerns since sniffing traffic is very
easily done. Depending on how good of a job the company has done
subnetting the networks they have in there control, your machine's traffic
could be seen by hundreds of users. with 21st century in chicago, they
actually started off handing out addresses with 16 bit masks. Since then
they have broken up their networks to limit the number of users on each
segment.
i think covering some of the ins and outs of ipchains, or how ip traffic
works may not be a bad idea for some newbie lug meetings.

cjm

________________________
Lunar Media Incorporated
what a wicked web we weave
http://www.lunarmedia.net
1 . 8 0 0 . 2 5 2 . 8 2 2 1  

On Wed, 12 Apr 2000, Tesla Coil wrote:

> 
> On 11 Apr 2000, Steven Pritchard replied to Cloudmaster:
> >> but I'll tell you, since I got my cable modem installed
> >> last Monday, I've got all kinds of ISO's... :)
> >
> > That reminds me...  We just got our service turned on last
> > Friday.  It's remarkably good.  (That might have something
> > to do with the fact that nobody else in the area is set up
> > yet, but I guess time will tell...)
> >
> > Is Springfield getting any closer to getting service yet?
> 
> Not expecting it anytime soon out here south of Pixley,
> but was curious--doesn't this mean more home users
> assigned static IP addresses?  If so, it suggests to me
> need for more popular awareness of network security
> practices.  I hear little talk about this, and not sure if
> it means there's reasons it's not such a concern, or if
> marketing just doesn't care to tell customers that the
> transition may be accompanied by additional worries.
> Wondering what the implications may be, particularly
> for Linux users, but also generally, given developments
> like the 911 worm propagating across the net by scanning
> for open Windows shares.
> 
> 
> --
> To unsubscribe, send email to majordomo@luci.org with
> "unsubscribe luci-discuss" in the body.
> 


--
To unsubscribe, send email to majordomo@luci.org with
"unsubscribe luci-discuss" in the body.