[nSLUG] Eastlink cable modem access

Gerald linux at zdoit.airpost.net
Thu Jan 31 13:38:08 AST 2008


Matt,

I forgot to say: Is there a problem that my IP addresses are sometimes 
issued by the 10.6.x.x address? My concern is it will give me a bad DNS 
server which in turn will give me the wrong IP addresses for some 
popular sites such as Paypal and my bank.

Matt Chamberlain wrote:
> Well I'm not too clear what your issue is, but any 24.x.x.x address is 
> likely to be Eastlink, or another web site. 10.x.x.x is going to be a 
> local address.
> 
> On Thu, Jan 31, 2008 at 1:27 PM, Gerald <linux at zdoit.airpost.net 
> <mailto:linux at zdoit.airpost.net>> wrote:
> 
>     I'm sorry it was not clear before the problem is the IP address of the
>     DHCP server that is issuing my address, not with the address I receive.
> 
>     The IP address I am getting is a valid Eastlink address. The IP address
>     issued is the same from both DHCP servers. No problems with getting
>     anywhere on the Internet.
> 
>     I looked at my logs where I sometimes see:
> 
>     Jan 28 16:22:21 x dhclient: DHCPREQUEST on eth0 to 24.x.x.x port 67
>     Jan 28 16:22:25 x dhclient: DHCPREQUEST on eth0 to 24.x.x.x port 67
>     Jan 28 16:22:25 x dhclient: DHCPACK from 24.x.x.x
>     Jan 28 16:22:25 x dhclient: bound to 24.y.y.y -- renewal in 68428
>     seconds.
> 
>     And sometimes something similar to:
> 
>     Jan 30 17:24:52 x dhclient: DHCPREQUEST on eth0 to 255.255.255.255
>     <http://255.255.255.255> port 67
>     Jan 30 17:24:57 x dhclient: DHCPREQUEST on eth0 to 255.255.255.255
>     <http://255.255.255.255> port 67
>     Jan 30 17:24:57 x dhclient: DHCPACK from 10.6.z.z
>     Jan 30 17:24:57 x NET: /sbin/dhclient-script : updated /etc/resolv.conf
>     Jan 30 17:24:57 x dhclient: bound to 24.y.y.y -- renewal in 78329
>     seconds.
> 
>     Jon wrote:
>      > A 10.6.x.x is a private network much like a 192.168 network. It is
>      > unroutable which means that any packet on the Internet to or from
>     a 10.
>      > IP will be dropped. So, Matt is correct in that you are getting an IP
>      > address from device which is issuing private IPs (and performing
>     NAT if
>      > you are able to get out onto the internet) and that is almost
>     always a
>      > router.
>      >
>      > While I'm relatively new to NS, I can't see a cable modem issuing
>     IPs.
>      > Assuming you can reach the outside world, try to traceroute something
>      > like google.com <http://google.com> <http://google.com> and see
>     what you get. That should
>      > illuminate some of your internal network routing.
>      >
>      > Jon
>      >
>      >
>      >
>      > On Jan 31, 2008 12:36 PM, Matt Chamberlain
>     <chamberlain2007 at gmail.com <mailto:chamberlain2007 at gmail.com>
>      > <mailto:chamberlain2007 at gmail.com
>     <mailto:chamberlain2007 at gmail.com>>> wrote:
>      >
>      >     Have you started using a router? 10.x.x.x is often associated
>     with
>      >     routers, I believe.
>      >
>      >     On Thu, Jan 31, 2008 at 12:34 PM, Gerald
>     <linux at zdoit.airpost.net <mailto:linux at zdoit.airpost.net>
>      >     <mailto:linux at zdoit.airpost.net
>     <mailto:linux at zdoit.airpost.net>>> wrote:
>      >
>      >         How do I tell if a 10.6.x.x IP address is my Eastlink
>     cable modem?
>      >
>      >         My DHCP addresses now seem to be issued by that instead
>     of the
>      >         222.x.x.x
>      >         address.
> 
>     --
>     Gerald
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> 
> 
> 
> ------------------------------------------------------------------------
> 
> This body part will be downloaded on demand.

-- 
Gerald



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