Re: Re: [Nolug] netbsd and cox cable modems

Thou spake:
>Power-cycling does not normally clear it...

I switched out another client of mine tonight, from his windows box to a
Linux firewall, and it pulled an IP right off, no issues with MAC addresses
at all.

I don't know how suspicious things have to be to trigger the security stuff.
You wanna clue us in?

>
>Hows the test modem working?

Just fine. I think I have everything ironed out. My server (the one that
hosts this list) had a little trouble for a while recently, but everything
seems to be ok now. Thanks for the help :-)

Incidentally, that account was set up under @home I guess about 3 years ago,
and I ran a netbsd firewall for 2 years, until my old server was lost in the
Bayou Lighting fire. I had to migrate to SuSE when I moved my stuff over to
the Cox connection, since I was under the gun and didn't have time to learn
sendmail and apache on a new platform, so that box got reformatted.

I haven't had to do much with dhcp before, and netbsd isn't exactly
point-n-click ;-)

Again, thanks :-)

--Joey

>
>Charles
>
>From: Joey Kelly <joey@joeykelly.net>
>Date: 2003/10/13 Mon AM 07:42:00 EDT
>To: nolug@joeykelly.net
>Subject: Re: [Nolug] netbsd and cox cable modems
>
>Thou spake:
>>Joey,
>>
>>You may be caught in the "DOCSIS" security loop. If you have only
>>one IP on the account... The way things are currently set to
>>prevent IP spoofing and other issues, is that the MAC of the first
>>device connected behind a cable modem is captured into the ARP
>>Cache and is the only one that should be able to pull an IP until it
>>expires (usually 8 hours) or until it is manually reset.
>
>Power-cycling the modem clears it?
>
>--Joey
>
>>Good bad or otherwise it does cause us issues and customers
>>pains. Hey, even when I change devices or when I'm playing with
>>different boxes I have to reset mine.
>>
>>Charles Jouglard
>>CHSI System Engineer
>>Cox New Orleans
>>504-417-3627
>
><snip>

-- 
Joey Kelly
< Minister of the Gospel | Computer Networking Consultant >
http://joeykelly.net
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