To unconditionally block and log all outbound ICMP traffic that is sent from the internal network to the external network, follow these steps(83 KB):
- Apply this download on each ISA Server.
- Then open the registry editor and go to the following key:
/HKEY_LOCAL_MACHINE/System/CurrentControlSet/Services/MspFltEx
- Add a registry key named "Parameters."
- Add a value under the "Parameters" key, with the name "BlockOutboundICMP" and type DWORD.
- Set "BlockOutboundICMP" value to any non-zero value.
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