[nSLUG] Eastlink cable modem access

Matt Chamberlain chamberlain2007 at gmail.com
Thu Jan 31 13:32:00 AST 2008


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> 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 port 67
> Jan 30 17:24:57 x dhclient: DHCPREQUEST on eth0 to 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> 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>> 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>> 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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