在/bin/sh下面会多输出一个-e

[Chinalover]

echo -e "require-pap\nlcp-echo-interval 10\nlcp-echo-failure 2"

-e require-pap
lcp-echo-interval 10
lcp-echo-failure 2

最后看到freebuf下面的评论才知道配置文件错了。。半天嗅探不出来

[qingxp9]

Thanks.
Now, I have fixed it.