[Cialug] OT: Cable Modem troubelshooting

Fri May 1 17:26:56 UTC 2020

That is the exact modem i have.  It is plenty fast enough for the gig
connection.  I have tested it and use it daily.

On Fri, May 1, 2020 at 12:25 PM David Champion <dchamp1337 at gmail.com> wrote:

> I bought a fairly nice modem since I didn't want it to be instantly
> obsolete, have an Arris SB8200, DOCSIS 3.1 modem with the option of running
> 2 gigabit ethernet ports. Funny that pretty much all of the MC people would
> say it's probably not fast enough for the 1gb internet connection I have, I
> should rent one of their modems, because they aren't familiar with it.
>
> -dc
>
> On Fri, May 1, 2020, 12:19 PM Jeffrey Ollie <jeff at ocjtech.us> wrote:
>
> > It's more than just MediaCom wanting to control the firmware, it's the
> > whole cable internet industry as it's baked into the DOCSIS protocol. On
> > the one hand, if you have an ISP that cares, they can remotely update
> > firmware to fix security issues (like for the recent Cable Haunt
> > vulnerability). Most end-users probably never heard about Cable Haunt and
> > probably wouldn't know how to update the firmware anyway.
> >
> > On the other hand, savvy end users like us lose a measure of control.
> > Especially if we purchased our own modem to save on rental fees and to
> get
> > a better performing device.
> >
> >
> >
> > On Fri, May 1, 2020 at 11:10 AM David Champion <dchamp1337 at gmail.com>
> > wrote:
> >
> > > Being a former ISP employee, I get that MC wants to control the modems,
> > but
> > > a huge nerd I also want to be able to control my network devices.
> > >
> > > They temporarily loaned me one of their combined modem/router/phone
> > > devices, I was like "uh, no". Took it back to them yesterday.
> > >
> > > -dc
> > >
> > >
> > > On Fri, May 1, 2020, 11:05 AM Jared Brees <fromj2sitsme at msn.com>
> wrote:
> > >
> > > > Moost point since it's working now, but side note - you CAN mess with
> > > > firmware, it just (if applicable) either requires soldering headers,
> or
> > > > spinning up your own equipment, similar to what Mediacom has on the
> > other
> > > > end. Even if you do the 2nd option, that firmware is "gone" as soon
> as
> > it
> > > > reboots.
> > > > ________________________________
> > > > From: Cialug <cialug-bounces at cialug.org> on behalf of David
> Champion <
> > > > dchamp1337 at gmail.com>
> > > > Sent: Thursday, April 30, 2020 14:39
> > > > To: Central Iowa Linux Users Group <cialug at cialug.org>
> > > > Subject: Re: [Cialug] OT: Cable Modem troubelshooting
> > > >
> > > > After a couple more tech support calls and some help from Chris (who
> > > > noticed I was getting a private IP address) I was able to get them to
> > > > register my modem properly and now it works again.
> > > >
> > > > -dc
> > > >
> > > >
> > > > On Thu, Apr 30, 2020 at 12:16 PM David Champion <
> dchamp1337 at gmail.com>
> > > > wrote:
> > > >
> > > > > I plugged into the Arris modem and it does give me a dhcp address,
> I
> > > can
> > > > > get into the modem at 192.168.100.1, I can view the software
> version,
> > > and
> > > > > can see the Event Log.
> > > > >
> > > > > I may try doing a reset on the modem with the recessed pinhole and
> > see
> > > if
> > > > > it will work.
> > > > >
> > > > > Thanks,
> > > > >
> > > > > -dc
> > > > >
> > > > >
> > > > > On Thu, Apr 30, 2020 at 11:42 AM Jimmy Lela <
> > binaryvisionary at gmail.com
> > > >
> > > > > wrote:
> > > > >
> > > > >> Dave,
> > > > >>
> > > > >> You're correct about the firmware, Mediacom controls that.  Last I
> > > knew
> > > > I
> > > > >> thought you could still access the modem's admin page and see
> useful
> > > > >> things
> > > > >> like TX power and SNR, but it's been a while, they may have locked
> > > that
> > > > >> down.  Do you get anything if you browse to whatever IP the admin
> > page
> > > > >> should be at, like 192.168.0.1 or similar?  Actually I just tried,
> > and
> > > > my
> > > > >> modem does respond at 192.168.01 but so far any default
> credentials
> > > I've
> > > > >> tried haven't worked.
> > > > >>
> > > > >> I've been renting a modem/router from Mediacom too but it's in
> > bridged
> > > > >> mode.  I've been looking to buy my own and am leaning towards a
> new
> > > > Arris
> > > > >> SB, I've had good success with them.
> > > > >>
> > > > >> On Thu, Apr 30, 2020, 11:24 AM David Champion <
> dchamp1337 at gmail.com
> > >
> > > > >> wrote:
> > > > >>
> > > > >> > Off Topic question:
> > > > >> > I have an Arris SB8200 cable modem on Mediacom, it was working
> > > > perfectly
> > > > >> > fine. Last week I started having flaky internet connection
> issues,
> > > it
> > > > >> got
> > > > >> > to the point where if I power cycle the modem, I could ping out
> to
> > > the
> > > > >> WAN
> > > > >> > gateway IP address for about 15 to 30 seconds, then it would
> stop.
> > > > >> >
> > > > >> > The modem had all 4 of the lights lit up normally, no indication
> > of
> > > > >> > problems.
> > > > >> >
> > > > >> > After bugging the 1st tier tech support guy at MC he finally
> > looked
> > > > hard
> > > > >> > enough to confirm that they could see the connection dropping,
> and
> > > he
> > > > >> > claimed they couldn't see the modem at all any more after that.
> > > > >> >
> > > > >> > Tech came out yesterday, said the modem was bad, they left me a
> > > modem
> > > > /
> > > > >> > router - Ubee 1301 as a loaner and they're charging me $50 for
> the
> > > > >> service
> > > > >> > call. I was able to get into the admin on it and turn off wifi
> and
> > > > >> change
> > > > >> > the LAN IP, seem  to be working.
> > > > >> >
> > > > >> > Question is: is there any troubleshooting I can do on the Arris
> > > modem?
> > > > >> From
> > > > >> > what I understand there's no way I can access it or update
> > firmware,
> > > > or
> > > > >> see
> > > > >> > if the provider pushed a bad firmware to it, I'm fully at their
> > > mercy.
> > > > >> Is
> > > > >> > this correct?
> > > > >> >
> > > > >> > Good thing I still have my old Internetsolver / Aureon DSL as a
> > > > backup.
> > > > >> >
> > > > >> > -dc
> > > > >> > _______________________________________________
> > > > >> > Cialug mailing list
> > > > >> > Cialug at cialug.org
> > > > >> > https://www.cialug.org/cgi-bin/mailman/listinfo/cialug
> > > > >> >
> > > > >> _______________________________________________
> > > > >> Cialug mailing list
> > > > >> Cialug at cialug.org
> > > > >> https://www.cialug.org/cgi-bin/mailman/listinfo/cialug
> > > > >>
> > > > >
> > > > _______________________________________________
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> >
> >
> > --
> > Jeff Ollie
> > The majestik møøse is one of the mäni interesting furry animals in
> Sweden.
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