4.7.2. 同步 sysctl
sysctl 文件在大多数情况下只修改一次。该文件在引导时读取并告知内核打开数据包转发功能。
重要
If you are not sure whether or not packet forwarding is enabled in the kernel, see 第 2.5 节 “启动数据包转发” for instructions on how to check and, if necessary, enable this key functionality.
