[Cialug] OT: Cable Modem troubelshooting

[Jimmy Lela]

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
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