i have both a modem and a lan card, both internal. i can now get my modem to dial and connect; however, my browser cannot find a website if i have my lan eth0 activated. it works fine if i deactivate my lan connection. what have i done wrong?

Do you have any sort of DNS entries in /etc/resolv.conf ?? Not sure if those would conflict but when your dialing up, and with the LAN active, they might be trying to use those instead or something like that..

yeap.
open your kppp settings go to account settings highligh the one that you use. click on edit and look for dns tab. type the dns servers of your ISP and you should be all set.

I'm Having the exact Same Problem. And I tried this solution but it didn't work .
KPPP Statistics showed 5 more packets instead of nothing at all .
But I Guess The 5 more packets are ARP .
But Still No software Detects that I'm Online .

thanks ..

Depending on your distribution, the dialler script will put a "defaultroute" option into pppd when it dials which requests it creates a gateway setting in your routing table.
If you have another "gateway" setting in /etc/sysconfig/network or in the eth~ settings, it will take precedence when the interface comes up.

type "route" before and after the interfaces are up to see what is being changed.

By default, a ppp~ connection coming up will overwrite the /etc/resolv.conf with the ISP supplied numbers, whereas a static eth~ coming up won't.

all You Said Is True but I didn't understand exactly what to do ??
And I'm Using Mandrake 8.1

Depending on how you set up the configuration, either via GUI or from the install,...
can you find your way back into the configuration settings?

Under KDE they are Start--System--Network, then configure the eth's to not have a gateway settting...
Then remove any gateway numbers from "/etc/sysconfig/network" file.
Type "route" from a command line and make sure there is no UG in the last line.
Practise bringing each interface up and checking the "route" output before and after.

This Is still bhefny but I Cganged My Profile.
I Opened Netconf and removed any Gateway setting I could Find.

The "/etc/sysconf/network ":

GATEWAY=""
GATEWAYDEV=""

and when I type "route" the last line contains UG.
which is my defauly line.
I Have three lines :
IP FLAG interface
192.168.0.0 U eh0
127.0.0.1 U lo
default UG eh0

and yes, I'm using KDE.
Do I Have To remove what "balam" told me about DNS ??
Thanks

Still Nothing Works .
The UG Flag Is Still On .

And I Have to Send all This From WINDOWS XP