Two computers and I can't ping between them, either way.

One is a 2003 Server. The other is an XP Pro. Both have subnet masks of
255.255.255.0 and gateways of 192.168.100.200 (a firewall). The 2003 Server
has a static IP of 192.168.100.201, and the XP Pro has a dynamic IP of
192.168.100.51. The DHCP server for the XP Pro box is the firewall on
..200, and the gateway is the same firewall. There are no rules that
prevent pings from one part of the LAN to another on the firewall and all
other machines on the same [switch connected to LAN port on firewall] can
ping each other just fine. So I don't think the firewall is to blame, and
the machines are on the same switch anyway.

If the 2 machines are on the same subnet, then I can't understand why
neither one can ping the other. ? What now?

"K. Abit" <(E-Mail Removed)> wrote in message
news:4689761a$0$12201$(E-Mail Removed)...
> Two computers and I can't ping between them, either way.
>
> One is a 2003 Server. The other is an XP Pro. Both have subnet masks of
> 255.255.255.0 and gateways of 192.168.100.200 (a firewall). The 2003
> Server has a static IP of 192.168.100.201, and the XP Pro has a dynamic IP
> of 192.168.100.51. The DHCP server for the XP Pro box is the firewall on
> .200, and the gateway is the same firewall. There are no rules that
> prevent pings from one part of the LAN to another on the firewall and all
> other machines on the same [switch connected to LAN port on firewall] can
> ping each other just fine. So I don't think the firewall is to blame, and
> the machines are on the same switch anyway.
>
> If the 2 machines are on the same subnet, then I can't understand why
> neither one can ping the other. ? What now?
>
>

You need to tell us if you ping the machines by IP address
or by NetBIOS name. This makes a big difference! You
must also disable the firewall on the WinXP PC, and any
other PC-based fireall you might have.

Can the machines actually ping anything at all?

"Pegasus (MVP)" <(E-Mail Removed)> wrote in message
news:%(E-Mail Removed)...
>
> "K. Abit" <(E-Mail Removed)> wrote in message
> news:4689761a$0$12201$(E-Mail Removed)...
>> Two computers and I can't ping between them, either way.
>>
>> One is a 2003 Server. The other is an XP Pro. Both have subnet masks of
>> 255.255.255.0 and gateways of 192.168.100.200 (a firewall). The 2003
>> Server has a static IP of 192.168.100.201, and the XP Pro has a dynamic
>> IP of 192.168.100.51. The DHCP server for the XP Pro box is the
>> firewall on .200, and the gateway is the same firewall. There are no
>> rules that prevent pings from one part of the LAN to another on the
>> firewall and all other machines on the same [switch connected to LAN port
>> on firewall] can ping each other just fine. So I don't think the
>> firewall is to blame, and the machines are on the same switch anyway.
>>
>> If the 2 machines are on the same subnet, then I can't understand why
>> neither one can ping the other. ? What now?
>>
>>
>
> You need to tell us if you ping the machines by IP address
> or by NetBIOS name. This makes a big difference! You
> must also disable the firewall on the WinXP PC, and any
> other PC-based fireall you might have.
>
> Can the machines actually ping anything at all?
>


I am pinging by IP address. I understand the difference, thanks.

Machines can both ping other things but not each other.

I can try to disable the firewall on the XP machine, which is probably
enabled. The machine does not have a bunch of third party junk. What about
the 2003 Server? Would that respond to pings by default or are pings
ignored by default?

K. Abit wrote:
> "Pegasus (MVP)" <(E-Mail Removed)> wrote in message
> news:%(E-Mail Removed)...
>> "K. Abit" <(E-Mail Removed)> wrote in message
>> news:4689761a$0$12201$(E-Mail Removed)...
>>> Two computers and I can't ping between them, either way.
>>>
>>> One is a 2003 Server. The other is an XP Pro. Both have subnet masks of
>>> 255.255.255.0 and gateways of 192.168.100.200 (a firewall). The 2003
>>> Server has a static IP of 192.168.100.201, and the XP Pro has a dynamic
>>> IP of 192.168.100.51. The DHCP server for the XP Pro box is the
>>> firewall on .200, and the gateway is the same firewall. There are no
>>> rules that prevent pings from one part of the LAN to another on the
>>> firewall and all other machines on the same [switch connected to LAN port
>>> on firewall] can ping each other just fine. So I don't think the
>>> firewall is to blame, and the machines are on the same switch anyway.
>>>
>>> If the 2 machines are on the same subnet, then I can't understand why
>>> neither one can ping the other. ? What now?
>>>
>>>
>> You need to tell us if you ping the machines by IP address
>> or by NetBIOS name. This makes a big difference! You
>> must also disable the firewall on the WinXP PC, and any
>> other PC-based fireall you might have.
>>
>> Can the machines actually ping anything at all?
>>
>
>
> I am pinging by IP address. I understand the difference, thanks.
>
> Machines can both ping other things but not each other.
>
> I can try to disable the firewall on the XP machine, which is probably
> enabled. The machine does not have a bunch of third party junk. What about
> the 2003 Server? Would that respond to pings by default or are pings
> ignored by default?
>
>
Firewall on server 2003 must be disabled (or configured to allow replies
to pings) just like the XP Pro box.
....kurt