The information contained in the only other thread I started:

http://www.knoppix.net/forum/viewtopic.php?t=29229

... may or may not be relevant, but I figured it couldn't hurt.

Other relevant info:

Abit IX38QuadGT motherboard

Realtek RTL8169/8110 Family Gigabit Ethernet NIC

Paradyne/Zhone 6381-A3 DSL modem/router combo
(DHCP is enabled)

Windows XP Home

I am thinking of eventually configuring a dual boot with Linux, but I want to play more with the live distros first. I am abale to surf the Web using Knoppix 5.1.1.

But I have problems with both Knoppix 6.0.1 (yes, I know that's not the most recent one) and Ubuntu 9.10 (that is the most recent one). It seems like I'm connected fine to the modem/router. And I am apparently connected to the Internet since I can ping various Web page URLs. But using a Web browser returns the "Unable to connect" message. And it's not a DNS issue since the same result occurs when I enter an IP address.

The newer CDs work on our network at work; Web browsing does occur with them. I'm guessing the issue is related to either my network card or router.

I could try the most recent Knoppix live CD, but since the latest Ubuntu CD is problematic, I have a hunch the latest Knoppix CD will have the same problem.

Any ideas?

Thanks in advance!