All my settings were already as you describe, except for the subnet mask. I tried changing it to 255.255.252.0 (how did you find out to use that one?) but still no luck.

I read in another thread something about dhcpd.conf but couldn't find any such file in my etc (is that where it goes?). Could this be the problem? Are there other .conf files I should be digging into?

The netmask will be set by DHCP (when it's working correctly) and shouldn't be changed.

dhcpd.conf is for the DHCP server daemon and not the client.

What is in this file: /etc/sysconfig/network-scripts/ifcfg-eth0

Cheers.

I found two files in that directory, one called "ifcfg-eth0", and one called "ifcfg-eth0 (using module tulip)". Here's the first:

DEVICE="eth0"
BOOTPROTO="dhcp"
NETMASK="255.255.252.0"
ONBOOT="yes"
MII_NOT_SUPPORTED=yes
DHCP_HOSTNAME=worh.rr.com
NEEDHOSTNAME=yes
IPADDR=""
IPXNETNUM_802_2=""
IPXPRIMARY_802_2="no"
IPXACTIVE_802_2="no"
IPXNETNUM_802_3=""
IPXPRIMARY_802_3="no"
IPXACTIVE_802_3="no"
IPXNETNUM_ETHERII=""
IPXPRIMARY_ETHERII="no"
IPXACTIVE_ETHERII="no"
IPXNETNUM_SNAP=""
IPXPRIMARY_SNAP="no"
IPXACTIVE_SNAP="no"

Here's the second:

DEVICE="eth0 (using module tulip)"
BOOTPROTO="dhcp"
NETMASK="255.255.255.0"
ONBOOT="yes"
IPADDR=""
IPXNETNUM_802_2=""
IPXPRIMARY_802_2="no"
IPXACTIVE_802_2="no"
IPXNETNUM_802_3=""
IPXPRIMARY_802_3="no"
IPXACTIVE_802_3="no"
IPXNETNUM_ETHERII=""
IPXPRIMARY_ETHERII="no"
IPXACTIVE_ETHERII="no"
IPXNETNUM_SNAP=""
IPXPRIMARY_SNAP="no"
IPXACTIVE_SNAP="no"

I would rename the "ifcfg-eth0 (using module tulip)" to something else. This shouldn't be necessary. I would then edit the "ifcfg-eth0" to just these lines (makea backup just in case):

DEVICE="eth0"
BOOTPROTO="dhcp"
ONBOOT="yes"
MII_NOT_SUPPORTED=yes

I would then (as root) do this:

# /etc/init.d/network stop
# /etc/init.d/network start

ifconfig -a

Give that a try and see what happens. This is quite a perplexing problem but I think we are close to figuring it out.

Cheers.

Okay, I did all that. Same result, though I'm learning a lot about the directory structure. What else should I look at?

Thanks again for all the help!

No problem. I would go back to my suggestion to try the other card and see what you get.

Cheers.

Here's another thing to do:

start the GUI of your choice
open two console windows
in one window type: # tail -f /var/log/messages
in the other: # ifdown eth0 and then # ifup eth0

post the lines as send in first window

Cheers.

Ta da!

With a minimum of fussin' and cussin' I switched to my other card, ran the wizard in Mandrake Control Center, and I'm live!

Thanks guys!

Hold on!

Okay, this worked fine, but then I rebooted my system, and my 'Net connectivity was gone. So I ran MCC again, ran the wizard, and now I'm live again. But I don't want to have to configure the network every single time I boot up. ;(