enabling ping on windows 2008

Administrative Tools > Windows Firewall with Advanced Security > 輸入規則

Scroll down to "File And Print Sharing (Echo Request - ICMPv4-IN)"

 (or v6 if you are using ipv6)

Enabled this rule 「啟用規則」按鈕在右手邊。

至於輸出規則的 ICMPv4-out 關閉就好。