VMware Workstation Guest won't reply to external pings [closed]

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http://serverfault.com – I have a Windows 7 x64 machine running VMware Workstation along with a Windows XP x86 guest. The Windows XP machine can ping every machine on my network, as expected, but none of them are able to ping the other way round. The only exception to this is that the host can ping the guest successfully. I'm using NAT in VMware, configured as follows: Host IP: Host GW: Guest IP: Guest: GW: Can anyone tell me how to configure my environment so that all machines can ping my guest? (HowTos)