are all cable modems external?

are all cable modems external?

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Subject Author Date
are all cable modems external? Jen 04-04-2005
Posted by Jen on April 4, 2005, 7:33 pm
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I looked up the installation guide for the Zoom 5001, and it sounds a

lot like what I'm looking for. But a couple questions still - 1) have

you found any websites for user feedback on this? and 2) if a

firewall/router typically goes BETWEEN the computer and the modem, how

would this work with the modem built in?

Thanks for your help on this!

David Wrote:

> No, not ALL cable modems are external. I'm trying to find one that's
> internal (I'm looking at the Zoom 5001) that also works with linux.
> The zoom 5001 is DOCSIS 1.0 out of the box and can(I've heard) be
> upgraded to DOCSIS 1.1.
>
> If you want to set it up in a computer you have to enable ip

> forwarding,
> probably NAT, and possibly a firewall and dhcp. This is why most plp

> go
> with external boxes - simplicity. That and the fact that external

> boxes
> seem to be the only thing supported by most cable providers.
>
> Fitting the internal cable modem in a SFF case like a shuttle along

> with
> other NIC's is (theoretically) doable assuming you have enough PCI

> slots.
>
> Good luck with this, I'm having a hard time figuring it out as well,
>
> Cheers,
> David
>
> Jen wrote:-
> I'm new to cable internet access and am researching Modems. From

> these
> discussions, the Motorola SURFboard 5100 modem seems pretty hot, and
> Linksys seems to be good for its routers. I'm trying to keep my

> total
> footprint very small (cute little Shuttle XPC), and wondered if there
> even was such a thing as an internal cable modem, just as there is

> for
> dial-up access.
>
> Also, I need firewall hardware, not just the firewall software. Do I
> need to buy a modem and router (only one PC needs access at a time)

> and
> a firewall all separately, or are any of these manufactured in a
> combined product?
>
> -





--

Jen


Pure Networks
Posted by Warren on April 4, 2005, 12:19 pm
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Jen wrote:
> I looked up the installation guide for the Zoom 5001, and it sounds a
> lot like what I'm looking for.


You mentioned in another message that you're on Comcast. Note that the Zoom
5001 is not on the list of approved modems for Comcast.

--
Warren H.

==========
Disclaimer: My views reflect those of myself, and not my
employer, my friends, nor (as she often tells me) my wife.
Any resemblance to the views of anybody living or dead is
coincidental. No animals were hurt in the writing of this
response -- unless you count my dog who desperately wants
to go outside now.
Care for your landscape with Black and Decker cordless tools
http://www.holzemville.com/mall/blackanddecker/index.html





Posted by David on April 4, 2005, 6:07 pm
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If you want to go the zoom 5001 route like me, rather than external...

Here are some review links I've found:
http://www.linuxhardware.org/article.pl?sid=04/04/19/1324259
http://www.dslreports.com/forum/remark,13018510 (a thread I started)
http://shopping.yahoo.com/p:Zoom%20Model%205001%2010.2Mbps%20PCI%20Internal%20Modem%20Modem:1990790229:page=user-reviews;_ylt=Am6CNDcCJZIvYUwOkTPBGHGqL70F;_ylu=X3oDMTByNXRsYzJvBF9zAzk2Mjg0NTg2BHNlYwN1c2VycmV2aWV3cw--?mid_key=0&mid=1&sortorder=
http://www3.nextag.com/serv/main/buyer/ProductM.jsp?nxtg=1c7043_730BCB2946AFA029&kw=Zoom_5001_CABLE_MODEM&product=35886394&pdir=3&click=n&node=300139&core=3&page=1&lgnode=300139&lgsearch=

In terms of firewalles, it depends on if you're using windows or Linux.

If you're using windows, you can get a firewall like black ice or zone
alarm, and have it filter traffic for all traffic on the modem. If
you're using Linux you usually make (read: code in a script) a firewall
based on iptables, assuming you have your kernel and sysctrl.conf
configured correctly.

A firewall is not always a physical box between a computer and "the
net", sometimes, in the case of internal modems, a firewall is
configured in the software.

If you get one, please share your experiences.

Cheers,
David

Jen wrote:
> I looked up the installation guide for the Zoom 5001, and it sounds a
> lot like what I'm looking for. But a couple questions still - 1) have
> you found any websites for user feedback on this? and 2) if a
> firewall/router typically goes BETWEEN the computer and the modem, how
> would this work with the modem built in?
>
> Thanks for your help on this!
>
> David Wrote:
>
>>No, not ALL cable modems are external. I'm trying to find one that's
>>internal (I'm looking at the Zoom 5001) that also works with linux.
>>The zoom 5001 is DOCSIS 1.0 out of the box and can(I've heard) be
>>upgraded to DOCSIS 1.1.
>>
>>If you want to set it up in a computer you have to enable ip
>>forwarding,
>>probably NAT, and possibly a firewall and dhcp. This is why most plp
>>go
>>with external boxes - simplicity. That and the fact that external
>>boxes
>>seem to be the only thing supported by most cable providers.
>>
>>Fitting the internal cable modem in a SFF case like a shuttle along
>>with
>>other NIC's is (theoretically) doable assuming you have enough PCI
>>slots.
>>
>>Good luck with this, I'm having a hard time figuring it out as well,
>>
>>Cheers,
>>David
>>
>>Jen wrote:-
>>I'm new to cable internet access and am researching Modems. From
>>these
>>discussions, the Motorola SURFboard 5100 modem seems pretty hot, and
>>Linksys seems to be good for its routers. I'm trying to keep my
>>total
>>footprint very small (cute little Shuttle XPC), and wondered if there
>>even was such a thing as an internal cable modem, just as there is
>>for
>>dial-up access.
>>
>>Also, I need firewall hardware, not just the firewall software. Do I
>>need to buy a modem and router (only one PC needs access at a time)
>>and
>>a firewall all separately, or are any of these manufactured in a
>>combined product?
>>
>>-
>
>
>


Posted by Warren on April 4, 2005, 6:22 pm
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David wrote:
> A firewall is not always a physical box between a computer and "the
> net", sometimes, in the case of internal modems, a firewall is
> configured in the software.

If you're running a software-based firewall on the same machine you're
trying to protect, it's like locking the bedroom door while leaving the
house's door to the outside unlocked. You may protect the stuff in the
bedroom, but they've made it into the house.

While most people don't have systems that need real, heavy-duty firewalls, a
software firewall is simply a joke. This is especially true when a NAT
router will provide better protection for about the same, and sometimes
lower cost than software firewalls.

--
Warren H.

==========
Disclaimer: My views reflect those of myself, and not my
employer, my friends, nor (as she often tells me) my wife.
Any resemblance to the views of anybody living or dead is
coincidental. No animals were hurt in the writing of this
response -- unless you count my dog who desperately wants
to go outside now.
Care for your landscape with Black and Decker cordless tools
http://www.holzemville.com/mall/blackanddecker/index.html





Posted by James Knott on April 4, 2005, 9:31 pm
If you were  Registered and logged in, you could reply and use other advanced thread options


Warren wrote:

> While most people don't have systems that need real, heavy-duty firewalls,
> a software firewall is simply a joke. This is especially true when a NAT
> router will provide better protection for about the same, and sometimes
> lower cost than software firewalls.

I think you'll find "hardware" firewalls are simply dedicated computers,
running software, often Linux or Unix. Also, my firewall is an old PC,
running Linux. Are you saying that IPTables on Linux is a joke?



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