Hey guys,

I've been testing Windows Vista for a couple of months already and recently installed RC1. The installation completed successfully and everything seems to be working normally except for my Internet connection.
My PC is connected to the Internet over an ADSL connection. I have a network card that is connected to my DSL modem (no router, firewall, whatsoever) and the connection is made over PPPoE. When I start Windows Vista, a few seconds after I log in I can see the LAN symbol in the system tray, but it has an exclamation mark and tells me that I have restricted connectivity (not sure if that's the English name since I have the German version installed that reads "Eingeschränkre Konnektivität"). It also tells me that there is a problem with my IP address. I changed the IPv4 properties to use the IP address 192.168.0.1 and the subnet mask 255.255.255.0 which is also what I use under Windows XP Service Pack 2, but no success. Letting Windows determine the IP address automatically also doesn't work (which is to be expected since there is no DHCP server in my network). Do you guys know how to fix this problem?

Regards,
Sebastian

Hi, what is your ADSL modem name (number)? It appears it may be configured at least over telnet.

I'm afraid I don't get your point.

Model name is e.g Zyxel Prestige 645M .

By default modem has address 192.168.0.1 or 192.168.1.1 and that you should specify as your "Default gateway", then your computer's address should be different from modem's, e.g. 192.168.0.10 or 192.168.1.10.
Most probably, your modem can be configured to act as a DHCP server, then manual configuration can be avoided. To enable DHCP service in the device you need to connect to its configuration interface via e.g. telnet:
go to Command prompt and type telnet 192.168.0.1 (your modem's IP address). Or if you have a newer model, then open your browser and go to http://192.168.0.1 and enable DHCP.

My modem cannot be configured at all. Are you sure you are not confusing this with a router? I never seen a PPPoE modem that can be configured.

Most modems that act as a PPP over Ethernet bridge have an ethernet interface, an IP address and can be configured (as opposed to USB ADSL modems).

Edit. For example, the above-mentioned Zyxel Prestige 645M

Oh, OK. Well, I have the default modem that T-Online used to ship when it introduced DSL connection. Teldat LAN 100 or something It's Teledat LAN 300. I never configured it and it runs perfectly under Windows XP and all Windows Vista betas I tried so far. Only RC 1 is causing this problem.

There is a possible solution on MSFT forums for a similar problem with Vista RC1 and SOHO routers:

Good luck!

Funny - I disabled IPv4 and IPv6 and this solved the problem. Connecting to the Internet also works flawlessly.

LMAO, how can it work flawlessly with IPv4 disabled?
Gotta love microsoft and their idiosyncrasy.

I have no idea. The network card is used exclusively for Internet acces using PPPoE. The Internet connection HAS IPv4 enabled and is set to receive the IP address from the provider (since T-Online assigns a new IP address for each connection; I don't have a static IP). However, I would imagine that the network card would get the same IP.