Re: ISPs blocking your access to the Internet?
From: Barton L. Phillips (bartonphillips_at_sbcglobal.net)
Date: Thu, 25 Aug 2005 22:37:23 GMT
> Hi *,
> I have had really odd problems with my access to the Internet. I am using
> knoppix with a disk-less box and if I go:
> root@1[knoppix]# /sbin/ifconfig
> root@1[knoppix]# cat /etc/resolv.conf
> I can exactly see the right configuration in order to access the Internet.
> Moreover, if I run ethereal I can see the whole Internet traffic reaching
> my NIC, but I am still not able to even ping my gateway
> My ISP's tech support people tell me, after going through the basic
> troubleshooting steps; Internet access configuration, line test, etc., that
> they can't understand why this is happening. The odd thing about it is that
> I do have access to the net and all of a sudden I don't and my MAC address
> doesn't even appear on the network (Verizon's) cache
> Why do you think this is happening?
> How could I debug/study these issues in more detail? Are there commercial
> line-test hardware out there?
> I would like to use a piece of hardware and/or software based line-test
> device that would not interfere with my access to the internet
> How could I fix this type of problems?
Make sure you netmask is correct. I had a similar thing happen when a
customer fiddled with his router and screwed up the network mask. All of
a sudden she couldn't get a whole set of web sights that she use to. It
took some time to figure this one out.
Do you have a router between your PC and the Internet (ADSL or cable)?