[PLUG] Is there a DNS cache in the Comcast modem?

[Denis Heidtmann]

Snarky, yes, but I appreciate the advice.  I had a wireless router which
you may recall from a previous post was blamed for a DNS poisoning event
(likely erroneously.)  And I have been considering Ooma for a while.  It is
time to do it.  Then getting my own cable modem will be simpler--more
choices if voice is not needed.  And it does appear I have learned little,
but not nothing, on this list.  Some people are slow learners.

But for curiosity's sake, does this modem have a DNS cache?

I believe they do use the wireless in the modem to provide xfinity
wireless, but I have been lead to believe it does not go under my bandwidth
and data cap.  My laptop reports an xfinity wireless but I have been unable
to connect to it.  Instead I connect to wireless using one I have named
Comcastrrash in the Arris.

-Denis

On Wed, Sep 20, 2017 at 12:45 PM, King Beowulf <kingbeowulf at gmail.com>
wrote:

> On 09/18/2017 10:16 PM, Denis Heidtmann wrote:
> > Answered by Comcast chat:
> >
> > I asked the question in my opening statement.  Here is the dialog.  Your
> > task is to tell me what the answer is.
> >
> > Harpreet 11:40 AM Let me check
> >
> > Harpreet 11:41 AM Just for the account security, May I have the complete
> > service address along with the zip code ?
> > ...
>
> <ugh...the horror....>
>
> You made a few errors in trying to resolve your recent cable modem issues:
>
> 1.  Arris TG1268T looks to be an EMTa telephony modem.  However I can't
> check with Arris since that model number does not appear to exist.
> Personally, I would not use anything C. provides and this avoid their
> nonsense and rental fees.
>
> 2.  since you want to clear DNS, that means you cable modem is also a
> wifi router?
>   2a C. is very likely hosting "free" xfinity wifi service using your
> bandwidth and data cap.
>   2b. cable modem + router is a non-optimal performance and security
> arrangement for you home network.
>   2c. Are you mad? have you learned nothing on this list?
>
> 3. You are using C. VOIP service. See 2c.
>
> I used to have one of their Arris EMTa cable modems (not a router since
> still had a nice wifi router) and VOIP service.  They do not even
> provide the backup battery!  I had all sorts of issues and went through
> 2 cable modems in <2 years.  I then smartened up:
>
> netgear WNDR3700 gigabit 802.11abg/n 2.4 and Ghz dual band running
> OpenWRT with 3 wifi SSIDs
> Its getting a antique but still works well.  It might be time for one of
> the new fancy AC versions, but with DD-Wrt or OpenWRT of course
> (Gargoyle is another good choice based on OpenWrt).
>
> Netgear CM600 cable modem
> It is mine. The admin pw is MINE.  no wifi, just 2 ports: coax and RJ45.
>  Idiot C. had to "provision" it twice and then they told me I had a
> loose cable and would I like to have a tech come in and install it for
> me?  Really?  I'm a freakin' service engineer for multinational
> laboratory equipment manufacturer and I CAN'T FIGURE OUT A LOOSE COAX
> CABLE!  <physically impossible expletive>
>
> Ooma Telo modem and VOIP service with bluetooth dongle
> Solid, cheap, has more features that C. and I sprung for premier service
> for a few extra features.  The BT dongle allows me to answer my cell
> using the handsets.  There are other service options as well.
>
> I have complete control over my network and DNS cache. I DO NOT USE C.
> DNS servers.  I may need to use C. as my ISP, but that does not mean
> they get any more $ than necessary.  Once I year or so I call, nicely
> threaten to quite and the cut my fee in 1/2 for another year.
>
> Denis, the above may be a wee snarky, but I feel your pain.  I seriously
> recommend getting your own hardware.  If you are in PDX area, I can assist.
>
> Have fun.
> Ed
>
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