Ive just installed debian-Lenny, and, with all other
applications Ive installed therewith working well, I
cannot get any kind of web connection to run.

I'll mention at the outset, I do use web from this same
computer without problems via either live-CD or usb linux...
this question concerns only my recent Lenny install, which
will not connect whatever I try.

Any web address I try, and with whatever browser, gives me
the same "cannot find address.html" or cannot connect screen...
Ive tried the default browser, konqueror, and a lynx type
text browser... none will connect to web.

Secondly I'll note, I have tried installing httpd apps...
X11 seems to be there... this is installing with synaptic,
so, I would think it should have picked up whatever was
missing, web connect wise. At this point it looks like
Lenny just doesnt work with my working internet connection...
that in turn seems unreasonable(!).

...any suggestions for getting active web connection ??

Any help much appreciated

Just an idea. I remember a few years ago I had a similar problem. The solution that worked for me was to disable ipv6 in firefox.
Type: about:config in the firefox address bar and find network.dns.disableIPv6 and set it to 'true'

Looks at what kind of device the ethernet is using the command lspci as root.