Can ping windows 2K wireless host, not XP, from Vista (same subnet

> I have a home LAN using a netgear wireless router (WPN 824). I also have:
>
> A laptop running Windows 2000 with a Centrino wireless chipset, address via
> DHCP
> A desktop running Windows XP Pro (firewall disabled) running Netgear PCI
> Wireless card (WPN511), address via DHCP
> A new Vista machine (firewall disabled, network configured as "private")
> running Netgear USB Wireless (WPN111), address via DHCP
> A desktop machine running XP Pro connected via 100 Mbit Ethernet, to the WPN
> 824, static address
>
> All are on the same LAN (192.168.3.0/24). The wireless router is addressed
> 192.168.3.1 and is the gateway to the internet, and the DHCP server. All
> machines can access the internet through the WPN 824. The machines running
> windows XP and Windows 2000 can all ping each other and share files. The
> machine running Vista can only ping the Windows 2000 machine, and can only be
> pinged by the Windows 2000 machine.
>
> When I attempt to ping one of the other (XP) wireless nodes on the network,
> from the Vista machine, I can see that the ARP is successful (because the IP
> address and appropriate MAC address are viewable in the Vista ARP cache after
> an attempt at pinging, and the Vista machines MAC address is visable in the
> ARP cache of the XP machine). However, the echo requests (or replies)
> themselves time out, no matter which side (XP or Vista) initiates the ping
> process.
>
> Why is it that I can pass traffic between the XP machines and the Win2K
> machine, and between the Win2K machine and the Vista machine, but not the
> Vista machine and the XP machines?
>
> Please help. I have also tried installing the LLDT for the XP machines.
> Doing so has not improved the situation (can't imagine why I'd need LLDT to
> ping, anyway). I'm an experienced network-guy (it's part of what I do for a
> living), but am totally new to Vista. Perhaps this is one of those unusual
> Vista Bugs?
>
> Please help,
>
> Aaron

> If turn off the firewall on wireless XP, can you ping it by IP?
>
> Bob Lin, MS-MVP, MCSE & CNE
> Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
> How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
> "IPTVGuy" <IPTVGuy@discussions.microsoft.com> wrote in message news:95AE56F0-7494-4CE3-A5AE-D334AF700371@microsoft.com...
> Update. I can ping the wired XP host (never tried that before), but not the
> wireless XP host. So now I'm down to one machine (XP wireless) that can talk
> to everything but my Vista wireless host. All other machines appear to be
> working just fine.
>
> Any assistance would be appreciated.
>
> "IPTVGuy" wrote:
>

> > I have a home LAN using a netgear wireless router (WPN 824). I also have:
> >
> > A laptop running Windows 2000 with a Centrino wireless chipset, address via
> > DHCP
> > A desktop running Windows XP Pro (firewall disabled) running Netgear PCI
> > Wireless card (WPN511), address via DHCP
> > A new Vista machine (firewall disabled, network configured as "private")
> > running Netgear USB Wireless (WPN111), address via DHCP
> > A desktop machine running XP Pro connected via 100 Mbit Ethernet, to the WPN
> > 824, static address
> >
> > All are on the same LAN (192.168.3.0/24). The wireless router is addressed
> > 192.168.3.1 and is the gateway to the internet, and the DHCP server. All
> > machines can access the internet through the WPN 824. The machines running
> > windows XP and Windows 2000 can all ping each other and share files. The
> > machine running Vista can only ping the Windows 2000 machine, and can only be
> > pinged by the Windows 2000 machine.
> >
> > When I attempt to ping one of the other (XP) wireless nodes on the network,
> > from the Vista machine, I can see that the ARP is successful (because the IP
> > address and appropriate MAC address are viewable in the Vista ARP cache after
> > an attempt at pinging, and the Vista machines MAC address is visable in the
> > ARP cache of the XP machine). However, the echo requests (or replies)
> > themselves time out, no matter which side (XP or Vista) initiates the ping
> > process.
> >
> > Why is it that I can pass traffic between the XP machines and the Win2K
> > machine, and between the Win2K machine and the Vista machine, but not the
> > Vista machine and the XP machines?
> >
> > Please help. I have also tried installing the LLDT for the XP machines.
> > Doing so has not improved the situation (can't imagine why I'd need LLDT to
> > ping, anyway). I'm an experienced network-guy (it's part of what I do for a
> > living), but am totally new to Vista. Perhaps this is one of those unusual
> > Vista Bugs?
> >
> > Please help,
> >
> > Aaron