Baffled by a Cable Modem
dnvot at yahoo.com
dnvot at yahoo.com
Wed Jun 17 13:07:42 UTC 2009
Here is a continuation of my efforts. I really appreciate the help.
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>Patrick wrote:
> Did you try another browser to see if it works with the other sites?
I installed and tried Dillo. It said "Query sent Waiting for reply"
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> Rick Stevens wrote
> Here's one way to troubleshoot it:
> Using FireFox, see if you can get to the cable modem's GUI interface.
> Most of them will have one of the following four IPs as their default:
> 192.168.0.1
> 192.168.0.254
> 192.168.1.1
> 192.168.1.254
tried all of those with no luck
> The first thing you should do is make sure your NIC can access all of
> those addresses without using a gateway. As root in
a console:
> ifconfig eth0 192.168.0.128 netmask 255.255.0.0
> This puts your computer on the class B (CIDR /16) network of 192.168.0.0
> and you should be able to hit any of the above four addresses directly
> (in fact, any IP from 192.168.0.1 through 192.168.255.254).
>Next, try "http://192.168.0.1" and see if you get the modem's GUI. If
> you don't, try the other three IPs above. If it's none of those, check
> the manual for the modem and see what the default LAN IP is. Make sure
> you get the LAN IP, _NOT_ the WAN IP (anything on the WAN side is the
> cable company's side of the connection).
tried all the above, with no luck. The manual does not mention a "LAN IP" that I can find. It does not mention a GUI.
> If you can browse the IP, then you know that at least your machine and
> your modem can communicate. Wander
through the modem's user interface
> looking for its DHCP server settings. Make sure the DHCP server is
> enabled and take note of which addresses it will offer (usually called
> the "pool").
> At this point, you should be able to have the modem give you an IP.
>Make sure your system is set up to fetch an IP address via DHCP and
> either reboot your system, restart NetworkManager (if you use it):
> service NetworkManager restart
> Once that's all done, again as root in a console, do:
> ifconfig eth0
> and verify it has an IP address that's in the range described by the
> pool data you got before. If that's all good, do:
> netstat -rn
It returned "Forwarding is ON or its state is unknown (5). OK, No RDISC.
Missing IP address argument."
it returned:
Kernel IP
routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0
> and verify that the line that contains the flags "UG" is the same
> IP as the cable modem. Example:
> 0.0.0.0 192.168.1.254 0.0.0.0 UG 0 0 0 eth0
> ^^^^^^^^^^^^^
> IP of cable modem
> If all that checks out, then you SHOULD
have a live connection to the
> Internet. The last thing to check is your /etc/resolv.conf file and
> ensure that the "nameserver" lines have legitimate IP addresses for
> live DNS servers. This should be set up when the DHCP server gives you
> the IP address and default route, but not always. If it doesn't set
> this up, you could manually add entries. Here's a couple of entries you
> can use:
> nameserver 208.67.222.222
> nameserver 208.67.220.220
I tried adding those to the top of the list of nameservers, and restarted firefox - no change . I then rebooted and they sre gone from resolv.conf again.
Hope that helps a bit.
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- Rick Stevens, Systems
Engineer ricks at nerd.com -
- AIM/Skype: therps2 ICQ: 22643734 Yahoo: origrps2 -
- -
- Microsoft Windows: Proof that P.T. Barnum was right -
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I am still
stuck. I seem to have a dedicated Google machine. I can check my mail at gmail.com, including loading messages ( I haven't tried to send one yet) The google search in Firefox works fine. GoogleEarth wiorks well -- and I still can't reach any other sites: And it all works fairly well in Windows XP ( it is still Windows! winipcfg doesn't work. There is a screwed up .dll, apparently )
It seems to me that it might be in the nameserver somewhere. I suspect the modem maker did something odd in the driver and furnished it to Microsoft and won't release it now. I saw that the USBnet programmers do not have a driver for this modem.
How can it work OK with google and have a configuration problem in my setup?
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