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Groups > comp.mobile.android > #20835 > unrolled thread

Re: What is a decent DOCSIS3.0 modem with WiFi?

Started byJF Mezei <jfmezei.spamnot@vaxination.ca>
First post2015-07-11 23:58 -0400
Last post2015-07-12 12:42 -0400
Articles 15 on this page of 55 — 11 participants

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  Re: What is a decent DOCSIS3.0 modem with WiFi? JF Mezei <jfmezei.spamnot@vaxination.ca> - 2015-07-11 23:58 -0400
    Re: What is a decent DOCSIS3.0 modem with WiFi? "D. F. Manno" <dfmanno@mail.com> - 2015-07-12 04:22 +0000
      Re: What is a decent DOCSIS3.0 modem with WiFi? Jolly Roger <jollyroger@pobox.com> - 2015-07-12 15:51 +0000
        Re: What is a decent DOCSIS3.0 modem with WiFi? Michelle Steiner <michelle@michelle.org> - 2015-07-12 09:09 -0700
          Re: What is a decent DOCSIS3.0 modem with WiFi? Jolly Roger <jollyroger@pobox.com> - 2015-07-12 16:37 +0000
            Re: What is a decent DOCSIS3.0 modem with WiFi? Michelle Steiner <michelle@michelle.org> - 2015-07-12 10:14 -0700
              Re: What is a decent DOCSIS3.0 modem with WiFi? The Real Bev <bashley101@gmail.com> - 2015-07-12 11:51 -0700
              Re: What is a decent DOCSIS3.0 modem with WiFi? Jolly Roger <jollyroger@pobox.com> - 2015-07-13 00:03 +0000
          Re: What is a decent DOCSIS3.0 modem with WiFi? Jeff Liebermann <jeffl@cruzio.com> - 2015-07-12 11:52 -0700
          Re: What is a decent DOCSIS3.0 modem with WiFi? "D. F. Manno" <dfmanno@mail.com> - 2015-07-12 21:37 +0000
            Re: What is a decent DOCSIS3.0 modem with WiFi? nospam <nospam@nospam.invalid> - 2015-07-12 18:07 -0400
            Re: What is a decent DOCSIS3.0 modem with WiFi? Michelle Steiner <michelle@michelle.org> - 2015-07-12 15:09 -0700
            Re: What is a decent DOCSIS3.0 modem with WiFi? Jeff Liebermann <jeffl@cruzio.com> - 2015-07-12 15:50 -0700
              Re: What is a decent DOCSIS3.0 modem with WiFi? The Real Bev <bashley101@gmail.com> - 2015-07-12 21:19 -0700
              Re: What is a decent DOCSIS3.0 modem with WiFi? Char Jackson <none@none.invalid> - 2015-07-17 18:16 -0500
          Re: What is a decent DOCSIS3.0 modem with WiFi? Lewis <g.kreme@gmail.com.dontsendmecopies> - 2015-07-13 02:02 +0000
            Re: What is a decent DOCSIS3.0 modem with WiFi? tlvp <mPiOsUcB.EtLlLvEp@att.net> - 2015-07-13 01:30 -0400
            Re: What is a decent DOCSIS3.0 modem with WiFi? "D. F. Manno" <dfmanno@mail.com> - 2015-07-13 14:57 +0000
              Re: What is a decent DOCSIS3.0 modem with WiFi? Jeff Liebermann <jeffl@cruzio.com> - 2015-07-13 08:16 -0700
                Re: What is a decent DOCSIS3.0 modem with WiFi? "D. F. Manno" <dfmanno@mail.com> - 2015-07-13 15:51 +0000
                Re: What is a decent DOCSIS3.0 modem with WiFi? "D. F. Manno" <dfmanno@mail.com> - 2015-07-13 15:55 +0000
                  Re: What is a decent DOCSIS3.0 modem with WiFi? Jeff Liebermann <jeffl@cruzio.com> - 2015-07-13 09:57 -0700
                    Re: What is a decent DOCSIS3.0 modem with WiFi? "D. F. Manno" <dfmanno@mail.com> - 2015-07-13 19:46 +0000
                      Re: What is a decent DOCSIS3.0 modem with WiFi? Jeff Liebermann <jeffl@cruzio.com> - 2015-07-13 14:17 -0700
                        Re: What is a decent DOCSIS3.0 modem with WiFi? "Kerr Mudd-John" <admin@127.0.0.1> - 2015-07-14 10:53 +0100
                        Re: What is a decent DOCSIS3.0 modem with WiFi? Char Jackson <none@none.invalid> - 2015-07-17 18:46 -0500
                          Re: What is a decent DOCSIS3.0 modem with WiFi? Jeff Liebermann <jeffl@cruzio.com> - 2015-07-18 09:03 -0700
                      Re: What is a decent DOCSIS3.0 modem with WiFi? Char Jackson <none@none.invalid> - 2015-07-17 18:48 -0500
              Re: What is a decent DOCSIS3.0 modem with WiFi? Jolly Roger <jollyroger@pobox.com> - 2015-07-13 16:17 +0000
                Re: What is a decent DOCSIS3.0 modem with WiFi? "D. F. Manno" <dfmanno@mail.com> - 2015-07-13 19:46 +0000
                  Re: What is a decent DOCSIS3.0 modem with WiFi? nospam <nospam@nospam.invalid> - 2015-07-13 16:00 -0400
                    Re: What is a decent DOCSIS3.0 modem with WiFi? "D. F. Manno" <dfmanno@mail.com> - 2015-07-13 20:32 +0000
                      Re: What is a decent DOCSIS3.0 modem with WiFi? Jolly Roger <jollyroger@pobox.com> - 2015-07-13 21:21 +0000
                      Re: What is a decent DOCSIS3.0 modem with WiFi? nospam <nospam@nospam.invalid> - 2015-07-13 17:28 -0400
                        Re: What is a decent DOCSIS3.0 modem with WiFi? "D. F. Manno" <dfmanno@mail.com> - 2015-07-13 23:06 +0000
                          Re: What is a decent DOCSIS3.0 modem with WiFi? nospam <nospam@nospam.invalid> - 2015-07-13 19:28 -0400
                        Re: What is a decent DOCSIS3.0 modem with WiFi? "D. F. Manno" <dfmanno@mail.com> - 2015-07-13 23:09 +0000
                          Re: What is a decent DOCSIS3.0 modem with WiFi? nospam <nospam@nospam.invalid> - 2015-07-13 19:28 -0400
                            Re: What is a decent DOCSIS3.0 modem with WiFi? "D. F. Manno" <dfmanno@mail.com> - 2015-07-14 00:45 +0000
                            Re: What is a decent DOCSIS3.0 modem with WiFi? "D. F. Manno" <dfmanno@mail.com> - 2015-07-14 02:48 +0000
                        Re: What is a decent DOCSIS3.0 modem with WiFi? "D. F. Manno" <dfmanno@mail.com> - 2015-07-13 23:12 +0000
                        Re: What is a decent DOCSIS3.0 modem with WiFi? "D. F. Manno" <dfmanno@mail.com> - 2015-07-14 00:05 +0000
                        Re: What is a decent DOCSIS3.0 modem with WiFi? "D. F. Manno" <dfmanno@mail.com> - 2015-07-14 00:14 +0000
                        Re: What is a decent DOCSIS3.0 modem with WiFi? "D. F. Manno" <dfmanno@mail.com> - 2015-07-14 00:28 +0000
                          Re: What is a decent DOCSIS3.0 modem with WiFi? Jeff Liebermann <jeffl@cruzio.com> - 2015-07-13 19:16 -0700
                            Re: What is a decent DOCSIS3.0 modem with WiFi? Char Jackson <none@none.invalid> - 2015-07-17 18:42 -0500
                              Re: What is a decent DOCSIS3.0 modem with WiFi? Jeff Liebermann <jeffl@cruzio.com> - 2015-07-17 18:05 -0700
            Re: What is a decent DOCSIS3.0 modem with WiFi? Jolly Roger <jollyroger@pobox.com> - 2015-07-13 16:13 +0000
            Re: What is a decent DOCSIS3.0 modem with WiFi? Jolly Roger <jollyroger@pobox.com> - 2015-07-13 16:15 +0000
              Re: What is a decent DOCSIS3.0 modem with WiFi? "D. F. Manno" <dfmanno@mail.com> - 2015-07-13 20:23 +0000
            Re: What is a decent DOCSIS3.0 modem with WiFi? Char Jackson <none@none.invalid> - 2015-07-17 18:19 -0500
        Re: What is a decent DOCSIS3.0 modem with WiFi? JF Mezei <jfmezei.spamnot@vaxination.ca> - 2015-07-12 12:46 -0400
          Re: What is a decent DOCSIS3.0 modem with WiFi? Jolly Roger <jollyroger@pobox.com> - 2015-07-12 16:57 +0000
            Re: What is a decent DOCSIS3.0 modem with WiFi? JF Mezei <jfmezei.spamnot@vaxination.ca> - 2015-07-12 13:20 -0400
      Re: What is a decent DOCSIS3.0 modem with WiFi? JF Mezei <jfmezei.spamnot@vaxination.ca> - 2015-07-12 12:42 -0400

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#20983

From"D. F. Manno" <dfmanno@mail.com>
Date2015-07-13 23:12 +0000
Message-ID<mo1gk5$nqf$3@news.albasani.net>
In reply to#20980
nospam <nospam@nospam.invalid> wrote in message
130720151728110307nospamospam@nospam.invalid

> it's wise not to put identifying information in the ssid, but why would
> being on a list matter?

You need to adjust your tinfoil hat a little tighter to understand why 
you need to be unique and to broadcast your SSID at home at the same time.

I think the keyword is butterfly, or is it rainbow hash tables?
I forget which, but anyone can download the hash for any of a million 
common passwords (this was years ago, so it's probably ten or twenty 
million by now) for all the common SSIDs.

[toc] | [prev] | [next] | [standalone]


#20986

From"D. F. Manno" <dfmanno@mail.com>
Date2015-07-14 00:05 +0000
Message-ID<mo1jng$nqf$4@news.albasani.net>
In reply to#20980
nospam <nospam@nospam.invalid> wrote in message
130720151728110307nospamospam@nospam.invalid

> i disable ping replies, which is usually enabled. offhand, i don't know
> what else i change.

I generally change the web port from 80, and I change the SSH port from, 
I think, 443, to something else, to make robo logins a bit more difficult 
(it won't help against a determined hacker, of course, nor a determined 
robot, but, it's easy enough to do, and, for me, it stopped a million 
login attempts that were hammering my router's cpu rejecting them).

[toc] | [prev] | [next] | [standalone]


#20987

From"D. F. Manno" <dfmanno@mail.com>
Date2015-07-14 00:14 +0000
Message-ID<mo1ka1$2qp$1@news.albasani.net>
In reply to#20980
nospam <nospam@nospam.invalid> wrote in message
130720151728110307nospamospam@nospam.invalid

> always disable remote login, but why do you need ssh access?

I login all the time to my rooftop router, and to my neighbor's rooftop 
routers (since we're all on the same subnet), just to see what's going 
on. 

It's how I found out that robots were hammering my system, and, how they 
stopped while still hammering my neighbor's systems, when I switched the 
ports.

$ ssh -p 4545 -l adm1n 192.168.2.1

BusyBox v1.11.2 (2014-10-01 16:45:24 EEST) built-in shell (ash)
Enter 'help' for a list of built-in commands.

XM.v5.5.10# tail /var/log/messages

In fact, you can see good stuff for debugging, for example, you can see 
what DHCP is used and what IP range is on the LAN, etc.
$ cat /etc/dnsmasq.conf

You can even log into your neighbor's rooftop router and see what domains 
they visit.
$ cat /proc/net/nf_conntrack

It's not wireshark nor netstumbler, but, it's a decent log of everywhere 
the router has been (less cryptic than wireshark output for example).

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#20989

From"D. F. Manno" <dfmanno@mail.com>
Date2015-07-14 00:28 +0000
Message-ID<mo1l2i$3p8$1@news.albasani.net>
In reply to#20980
nospam <nospam@nospam.invalid> wrote in message
130720151728110307nospamospam@nospam.invalid

>> Allow factory reset switch to work (I have used it a few times)
> 
> i've never seen a setting to enable or disable a hardware reset.

There's a setting to enable or disable hardware reset on *every* rooftop 
radio that I have seen.

Here's a picture of one screen of my rooftop router's configuration:
http://i.imgur.com/ow0WyR8.jpg

Of course, these WiFi radios also have sliders for signal strength, 
distance, channel width, dynamic dns, telnet servers, web servers, ping 
watchdog, snmp agent, ssh server, ntp client, system log, etc.

Point is that these routers have more features than your average mom-and-
pop router, as Jeff well knows.

[toc] | [prev] | [next] | [standalone]


#20992

FromJeff Liebermann <jeffl@cruzio.com>
Date2015-07-13 19:16 -0700
Message-ID<chp8qali57nkmbhgefre1i9h9pg6a690pm@4ax.com>
In reply to#20989
On Tue, 14 Jul 2015 00:28:02 +0000 (UTC), "D. F. Manno"
<dfmanno@mail.com> wrote:

>Here's a picture of one screen of my rooftop router's configuration:
>http://i.imgur.com/ow0WyR8.jpg

Ubiquiti wireless bridge (or router).  Nice hardware.

>Point is that these routers have more features than your average mom-and-
>pop router, as Jeff well knows.

Yep.  Features and functions get added faster than bugs get fixed.

I really hate security discussions.  They never end, never reach a
consensus, there's always one more security hole, and even those
routers that are certified and blessed by an expensive certification
organization, are problematic.

Anyway, permit me to point out the giant gaping monstrous security
hole, that most users can't see or just ignore.  It's the WPA-PSK
shared key.  Every computah, tabloid, smartphone, xbox, etc that
connects to a single secured router uses the same pass phrase.
Considerable effort has gone into making this pass phrase difficult to
sniff and recover.  Yet, all it takes is one insecure client radio,
and the pass phrase or usable hash code can be recovered.  Here's a
good example:
<http://www.nirsoft.net/utils/wireless_key.html>
If you have an Android tablet that's been rooted, there are several
utilities that will display the saved pass phrases.  I use this one:
<https://play.google.com/store/apps/details?id=com.wifipass.recovery>
Steal my ancient Droid X2 and you can see *ALL* my wireless pass
phrases.  Note that it doesn't matter if you're using WEP, WPA-TKIP,
or WPA2-AES encryption.  The password is there in plain sight.  I
assume there's something similar for jail broken Apple products.

So whatcha gonna do?  Well, big business uses a WPA2-Enterprise-AES
with 802.1x and EAP authentication.  You could too, except that there
is only one commodity grade wireless router that includes the
necessary features (ZyXEL G-2000 Plus) and it's rather limited with
only 5 logins.  You'll either need to subscribe to a service, or build
your own RADIUS server:
<http://freeradius.org>
<http://wiki.freeradius.org/guide/WPA-HOWTO>
<http://wiki.freeradius.org/protocol/EAP>
<https://play.google.com/store/apps/details?id=com.larscom.freeradiusandroid>

So, how duz it work?  Very roughly, each user gets a login and
password  from the RADIUS server when connecting.  If they
successfully login, the RADIUS server delivered a one time WPA2-AES
key to the clients wireless device, which is only good the current
session.  Disconnect, and you get a new key.  I won't go into the EAP
authentication part (mostly because I barely understand how it works).
There are also lots of variations, such as no user/password on login,
which is the easy way to do encrypted coffee shop systems.

The RADIUS server does not need to be inside or next to your wireless
router.  It can be anywhere on the internet.  For example, the
University of Calif runs one that covers all their facilities.  A user
can login literally anywhere on the UC system and get authenticated
for the entire system.  I run my RADIUS server in my office and in a
server farm for several of my customers systems.  There are also
services that will do it for you.  Here's an example of an online
service that puts the RADIUS server in the "cloud":
<http://cloudessa.com>

Before the inevitable demise of wireless as we know it, perhaps the
router manufacturers will cease advertising astronomical wireless
speeds and do something about the pre-shared key security problem?
Naw, it will never happen.  Security doesn't sell routers, while big
number do.



-- 
Jeff Liebermann     jeffl@cruzio.com
150 Felker St #D    http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann     AE6KS    831-336-2558

[toc] | [prev] | [next] | [standalone]


#21050

FromChar Jackson <none@none.invalid>
Date2015-07-17 18:42 -0500
Message-ID<sk4jqadq0uq4t77i6nv9ifc6d7odpbmggp@4ax.com>
In reply to#20992
On Mon, 13 Jul 2015 19:16:32 -0700, Jeff Liebermann <jeffl@cruzio.com>
wrote:

>So whatcha gonna do?  Well, big business uses a WPA2-Enterprise-AES
>with 802.1x and EAP authentication.  You could too, except that there
>is only one commodity grade wireless router that includes the
>necessary features (ZyXEL G-2000 Plus) and it's rather limited with
>only 5 logins.  You'll either need to subscribe to a service, or build
>your own RADIUS server:
><http://freeradius.org>
><http://wiki.freeradius.org/guide/WPA-HOWTO>
><http://wiki.freeradius.org/protocol/EAP>
><https://play.google.com/store/apps/details?id=com.larscom.freeradiusandroid>


I haven't checked in a long while, but I thought dd-wrt included the
capability to do RADIUS, and thus WPA2-Enterprise.

[toc] | [prev] | [next] | [standalone]


#21053

FromJeff Liebermann <jeffl@cruzio.com>
Date2015-07-17 18:05 -0700
Message-ID<318jqa527f85n4p4pgojkjaq77v0u596j0@4ax.com>
In reply to#21050
On Fri, 17 Jul 2015 18:42:58 -0500, Char Jackson <none@none.invalid>
wrote:

>On Mon, 13 Jul 2015 19:16:32 -0700, Jeff Liebermann <jeffl@cruzio.com>
>wrote:
>
>>So whatcha gonna do?  Well, big business uses a WPA2-Enterprise-AES
>>with 802.1x and EAP authentication.  You could too, except that there
>>is only one commodity grade wireless router that includes the
>>necessary features (ZyXEL G-2000 Plus) and it's rather limited with
>>only 5 logins.  You'll either need to subscribe to a service, or build
>>your own RADIUS server:
>><http://freeradius.org>
>><http://wiki.freeradius.org/guide/WPA-HOWTO>
>><http://wiki.freeradius.org/protocol/EAP>
>><https://play.google.com/store/apps/details?id=com.larscom.freeradiusandroid>

>I haven't checked in a long while, but I thought dd-wrt included the
>capability to do RADIUS, and thus WPA2-Enterprise.

Yep.  I forgot about that.
<https://www.dd-wrt.com/demo/FreeRadius.asp>
(click "enable").

The RADIUS and MySQL servers are usually external, but there are those
hardy souls that have gotten it to work in firmware.
<http://www.matrix44.net/blog/wp-content/uploads/2014/05/DD-WRT-WPA2-Enterprise.pdf>
Unfortunately, I gave up trying to make it work, and went to an
external RADIUS server.  I guess I should try again with some of the
later builds (e.g. Kong).






-- 
Jeff Liebermann     jeffl@cruzio.com
150 Felker St #D    http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann     AE6KS    831-336-2558

[toc] | [prev] | [next] | [standalone]


#20944

FromJolly Roger <jollyroger@pobox.com>
Date2015-07-13 16:13 +0000
Message-ID<d0i6doFmajjU3@mid.individual.net>
In reply to#20885
On 2015-07-13, Lewis <g.kreme@gmail.com.dontsendmecopies> wrote:
> In message <120720150909113155%michelle@michelle.org> 
>   Michelle Steiner <michelle@michelle.org> wrote:
>> In article <d0fgnsF1gpgU5@mid.individual.net>, Jolly Roger
>> <jollyroger@pobox.com> wrote:
>
>>> I use Comcast with my own cable modem (a Motorola SURFboard SB6121). My
>>> bill is $12.95/month cheaper without the equipment rental fee. Highly
>>> recommended.
>
>> I have an SB6121 also; I was wondering whether replacing it with an
>> SB6141 is worth the expense.  My carrier is Cox Communications.
>
> I used to have my own modem with Comcast. Trouble was, anytime anything
> went wrong, even if they had a huge outage in my area, they always
> claimed the problem was my modem.
>
> Assholes.

No such experience here, even switching from consumer to business class.
They largely leave me alone, and my service is relatively reliable,
which is exactly what I want (knock on wood). But yes, their customer
service folks are a bunch of assholes. : )

-- 
E-mail sent to this address may be devoured by my ravenous SPAM filter.
I often ignore posts from Google. Use a real news client instead.

JR

[toc] | [prev] | [next] | [standalone]


#20945

FromJolly Roger <jollyroger@pobox.com>
Date2015-07-13 16:15 +0000
Message-ID<d0i6h3FmajjU4@mid.individual.net>
In reply to#20885
On 2015-07-13, D. F. Manno <dfmanno@mail.com> wrote:
> Lewis <g.kreme@gmail.com.dontsendmecopies> wrote in message
> slrnmq673p.67l.g.kreme@amelia.local
>
>> I used to have my own modem with Comcast. Trouble was, anytime anything
>> went wrong, even if they had a huge outage in my area, they always
>> claimed the problem was my modem.
>
> Based on the advice here, I think I'll buy the Costco modem that
> Jeff suggested, and then a normal router, and that should set them
> up (for about $150).

His advice about purchasing the cable modem and router separately is a
good one, IMO. That's the setup I use, with a Motorola SURFboard SB6121
and an Apple Airport Extreme.

-- 
E-mail sent to this address may be devoured by my ravenous SPAM filter.
I often ignore posts from Google. Use a real news client instead.

JR

[toc] | [prev] | [next] | [standalone]


#20976

From"D. F. Manno" <dfmanno@mail.com>
Date2015-07-13 20:23 +0000
Message-ID<mo16ou$svs$1@news.albasani.net>
In reply to#20945
Jolly Roger <jollyroger@pobox.com> wrote in message
d0i6h3FmajjU4@mid.individual.net

> His advice about purchasing the cable modem and router separately is a
> good one, IMO. That's the setup I use, with a Motorola SURFboard SB6121
> and an Apple Airport Extreme.

It's perfect. 
1. Costco for the modem.
2. The best router I can find (with high speed ethernet & n/ab/), 5/2.4MHz
3. I'll try to talk Comcast out of the $50 service call also (as advised 
here).

[toc] | [prev] | [next] | [standalone]


#21049

FromChar Jackson <none@none.invalid>
Date2015-07-17 18:19 -0500
Message-ID<i93jqah45a5d5i73js8iatdkjjesoputid@4ax.com>
In reply to#20885
On Sun, 12 Jul 2015 20:28:11 -0700, Jeff Liebermann <jeffl@cruzio.com>
wrote:

>On Mon, 13 Jul 2015 02:02:10 +0000 (UTC), Lewis
><g.kreme@gmail.com.dontsendmecopies> wrote:
>
>>I used to have my own modem with Comcast. Trouble was, anytime anything
>>went wrong, even if they had a huge outage in my area, they always
>>claimed the problem was my modem.
>
>Really?  I have about a dozen customers and friends that own their own
>Comcast modems.  I've handled outages for them a few times and never
>had the phone support person specifically blame the customer owned
>equipment.  They can see the same numbers for signal levels and SNR
>that you can see at 192.168.100.1 and can tell if there's a problem
>with the line, the drop, or the modem.  In other words, they can tell
>if there's a problem on your premises, which is quite common.  If the
>modem checks out ok with a remote diagnostic and reboot, they may
>suggest that you plug your computer directly into the modem to
>eliminate problems caused by house wiring, router, wireless, etc.  If
>that works, the problem is with your equipment.  Even if support
>cannot "see" the modem, they will ask what the lights on the modem are
>doing in an effort to determine if it's a line or modem problem.
>Oddly, it never occurs to many people (including me) to check if the
>TV signal is working on the cable to determine if there's a line or
>drop problem.  That happened a few weeks ago at one customers, where
>mice had chewed through the coax trying to get into the house.

Same experience here. I always hear the stories about them blaming a
customer-owned modem, but I've never experienced it.

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#20860

FromJF Mezei <jfmezei.spamnot@vaxination.ca>
Date2015-07-12 12:46 -0400
Message-ID<55a299d5$0$54641$c3e8da3$fdf4f6af@news.astraweb.com>
In reply to#20856
On 15-07-12 11:51, Jolly Roger wrote:

> Here's a list of approved modems for Comcast:
> 
> <http://mydeviceinfo.comcast.net>

Then probably remotely update a new modem with "their" firmware.  (not
talking about docsis stuff at every power up, actual firmware). That is
how they could allow any modem of a certain model to work.

[toc] | [prev] | [next] | [standalone]


#20861

FromJolly Roger <jollyroger@pobox.com>
Date2015-07-12 16:57 +0000
Message-ID<d0fkk4F1gpgU12@mid.individual.net>
In reply to#20860
On 2015-07-12, JF Mezei <jfmezei.spamnot@vaxination.ca> wrote:
> On 15-07-12 11:51, Jolly Roger wrote:
>
>> Here's a list of approved modems for Comcast:
>> 
>> <http://mydeviceinfo.comcast.net>
>
> Then probably remotely update a new modem with "their" firmware.  (not
> talking about docsis stuff at every power up, actual firmware). That is
> how they could allow any modem of a certain model to work.

Yep, like I said in the part you snipped out:

Comcast controls the modem configuration, but you can still access the
modem's built-in management web page (http://192.168.100.1/) to look at
how it is configured, check the logs, reset it, and so on.

-- 
E-mail sent to this address may be devoured by my ravenous SPAM filter.
I often ignore posts from Google. Use a real news client instead.

JR

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#20864

FromJF Mezei <jfmezei.spamnot@vaxination.ca>
Date2015-07-12 13:20 -0400
Message-ID<55a2a1fb$0$57595$b1db1813$2411a48f@news.astraweb.com>
In reply to#20861
On 15-07-12 12:57, Jolly Roger wrote:

> Yep, like I said in the part you snipped out:
> 
> Comcast controls the modem configuration, 

Yes, but the cable carrier is also able to push new firmware to modems.
(very different from docsis config which is done whenever modem connects
to the coax network). So it is possible that Comcast accepts "off the
shelf" modems because its CMTS detect wrong firmware and and
automatically push their firmware onto modem.

(This is different from canadian carriers who do not accept modems with
wrong firware, and only do "mass" firware upgrades to fix known bugs in
modems).

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#20859

FromJF Mezei <jfmezei.spamnot@vaxination.ca>
Date2015-07-12 12:42 -0400
Message-ID<55a29903$0$54641$c3e8da3$fdf4f6af@news.astraweb.com>
In reply to#20836
On 15-07-12 00:22, D. F. Manno wrote:

> Comcast told me I can get any DOCSIS3.0 modem and it would work so
> that's not the case here in the states (thank heaven).

Interesting policy.

> In general, do they let you have root privileges on the modem if
> you buy it yourself?


When the modem powers up, it asks the coax side for its settings. The
CMTS then provisions the modem with a whole bunch of stuff, from
encryption keys, your customer profile (speeds, number of IPs allowed
etc), and modem specific stuff (such as disabling access to the modem
from the LAN which is something canadian carriers do).


The modem manufacturers provide cable carriers who a whole bunch of
options on how to restrict the modem. (similar to handset manufactyirers
who give carriers ability to change home menu, disable functions, add
their crapware etc).

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