[Cialug] OT: Cable Modem troubelshooting

[chris at bynw.com]

The Arris modem doesn't have wifi so if it's connected to your cable 
service you should be able to access it. Generally it's at 192.168.1.100

If it's connected to the cable service the firmware can be seen by any 
technical rep at Mediacom. Updating it isn't possible by the end user 
but it can be done by Mediacom if there is an approved firmware update 
available.

If you have a wireless gateway, that might be locked down more if you 
aren't paying for Mediacom's wireless service.




On 2020-04-30 11:41, Jimmy Lela 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
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