Cable Modems Cannot reach config to Ambit Modem - Ideas?

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Subject Author Date
Cannot reach config to Ambit Modem - Ideas? Tony Martin 01-15-06
Posted by Tony Martin on January 15, 2006, 7:09 am
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Hardware:
Ambit Modem U10C018 connected to Charter coax.
US Robotics 8003 Router between Modem and XP SP1 PC.

All works well - except:

When I try to access the Modem vi "192.168.100.1" through
the Browser, 99% of time it times out. The rare moment I can
get into the Modems configuration page, to read the
Modem's Dwn and Upload dBm and SNR values, the
modems built in web server seems ok.

Can anyone provide ideas why? Is the router blocking
the non routable IP of 192.168.100.1 from reaching the
the Modem? or?? any fixes? ideas?? Should I set the
routers MAC to be the same as the modems (or the PCs)??
Help!

TIA,
Tony


Posted by Quaoar on January 15, 2006, 6:09 pm
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Tony Martin wrote:
> Hardware:
> Ambit Modem U10C018 connected to Charter coax.
> US Robotics 8003 Router between Modem and XP SP1 PC.
>
> All works well - except:
>
> When I try to access the Modem vi "192.168.100.1" through
> the Browser, 99% of time it times out. The rare moment I can
> get into the Modems configuration page, to read the
> Modem's Dwn and Upload dBm and SNR values, the
> modems built in web server seems ok.
>
> Can anyone provide ideas why? Is the router blocking
> the non routable IP of 192.168.100.1 from reaching the
> the Modem? or?? any fixes? ideas?? Should I set the
> routers MAC to be the same as the modems (or the PCs)??
> Help!
>
> TIA,
> Tony

I suspect a DNS server problem. How is the rest of your network access?
"Normally" you set up your computer network connection without
specifying a DNS server -only setting DHCP or "connect autmatically".
You can specify your default gateway, the router's LAN IP (192.168.X.1)
if you want to. The router should also be set up for DHCP and toggle it
as a DNS server for the LAN.



Q


Posted by Tony Martin on January 16, 2006, 2:52 am
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wrote:

>Tony Martin wrote:
>> Hardware:
>> Ambit Modem U10C018 connected to Charter coax.
>> US Robotics 8003 Router between Modem and XP SP1 PC.
>>
>> All works well - except:
>>
>> When I try to access the Modem vi "192.168.100.1" through
>> the Browser, 99% of time it times out. The rare moment I can
>> get into the Modems configuration page, to read the
>> Modem's Dwn and Upload dBm and SNR values, the
>> modems built in web server seems ok.
>>
>> Can anyone provide ideas why? Is the router blocking
>> the non routable IP of 192.168.100.1 from reaching the
>> the Modem? or?? any fixes? ideas?? Should I set the
>> routers MAC to be the same as the modems (or the PCs)??
>> Help!
>>
>> TIA,
>> Tony
>
>I suspect a DNS server problem. How is the rest of your network access?
> "Normally" you set up your computer network connection without
>specifying a DNS server -only setting DHCP or "connect autmatically".
>You can specify your default gateway, the router's LAN IP (192.168.X.1)
>if you want to. The router should also be set up for DHCP and toggle it
>as a DNS server for the LAN.
>
>
>
>Q

Thanks for your feedback. To answer your question first
please note I already mentioned "all works well", meaning
there are no other problems.

Since I am specifying the modems IP there is no need for DNS as
I understand it. Aside, I have no problems reaching anything on
the WAN using verbose URL's

My best WAG is either the router is blocking
the modems non routable IP address or the modem's firmware
is buggy. However the router is set to DMZ and should not
be blocking anything and the modem has been on the market
for two years and has the latest firmware update from a year
ago.

Perhaps its possible the ISP has reprovisioned the modem
online to stop access to its configuration, logs etc but they say no.
Another thought is that the software firewall is blocking
access, but why that IP (192.168.100.1) and not the IP
of the router (192.168.123.254) which I CAN reach without
problems??

As Mulder would say, "the truth is out there" :-)

TIA,
Tony










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