在座说高危的老哥，想必都看不上这些公司吧？

端口和高危不高危有啥关系? 如果 80 端口高危的话，那我用嘴呼吸也是高危咯?

macbook ~ % curl -s -I http://baidu.com | grep HTTP
HTTP/1.1 200 OK
macbook ~ % curl -s -I http://jd.com | grep HTTP
HTTP/1.1 301 Moved Permanently
macbook ~ % curl -s -I http://taobao.com | grep HTTP
HTTP/1.1 301 Moved Permanently
X-protocol: HTTP/1.1
macbook ~ % curl -s -I http://qq.com | grep HTTP
HTTP/1.1 302 Moved Temporarily
macbook ~ % curl -s -I http://weibo.com | grep HTTP
HTTP/1.1 301 Moved Permanently
macbook:~ curl -s -I http://google.com | grep HTTP
HTTP/1.1 301 Moved Permanently
macbook:~ curl -s -I http://apple.com | grep HTTP
HTTP/1.1 301 Redirect
macbook:~ curl -s -I http://www.amazon.com | grep HTTP
HTTP/1.1 301 Moved Permanently
macbook:~ curl -s -I http://www.facebook.com | grep HTTP
HTTP/1.1 301 Moved Permanently
macbook:~ curl -s -I http://www.microsoft.com | grep HTTP
HTTP/1.1 200 OK

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