pingable

常見例句

• #define ICMP_ECHO 8 /* Echo Request */ you might allow it incoming for trusted addresses (note some NICs will require you to make your primary DNS Server pingable!
  如果槼則庫通過了這個數(shù)據(jù)包，本次會話被添加狀態(tài)檢測表中。所有後續(xù)的包都會和狀態(tài)檢測表比較而被通過。
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