I am experiencing an odd problem with one specific server at my data centre connecting from my laptop.

Basically the server is accessible from other machines in my house, but not from 1 particular laptop which is running windows XP.

I have setup tcpdump on the server and wireshark on the laptop, and I can see ping echo request and reply packets that actually make it back to the wireshark on the laptop, but nothing shows in the ping console output like so;

$ ping xxx.55.32.255

Pinging xxx.55.32.255 with 32 bytes of data:

Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for xxx.55.32.255:
    Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

But I can see from the wireshark on my local laptop that the ping reply gets back...

No.     Time        Source                Destination           Protocol Info
     46 3.964474    192.168.1.64          xxx.55.32.255         ICMP     Echo (ping) request

Frame 46 (74 bytes on wire, 74 bytes captured)
Ethernet II, Src: Intel_31:d3:01 (00:19:d2:42:c3:01), Dst: ThomsonT_01:b8:2c (00:14:7f:02:b9:3c)
Internet Protocol, Src: 192.168.1.64 (192.168.1.64), Dst: xxx.55.32.255 (xxx.55.32.255)
Internet Control Message Protocol

No.     Time        Source                Destination           Protocol Info
     48 4.119060    xxx.55.32.255         192.168.1.64          ICMP     Echo (ping) reply

Frame 48 (74 bytes on wire, 74 bytes captured)
Ethernet II, Src: ThomsonT_01:b8:2c (00:14:7f:01:b8:2c), Dst: Intel_21:c3:01 (10:20:d2:31:c3:01)
Internet Protocol, Src: xxx.55.32.255 (xxx.55.32.255), Dst: 192.168.1.64 (192.168.1.64)
Internet Control Message Protocol

obviously I have disabled the windows firewall and there is nothing in the windows event log. There is nothing else obviously strange about the server as it is the same build as other servers that I can connect to fine.