## nginx未設定http_host條件前  將header的host竄改成 www.test.com 可以返回200 OK  ## nginx設定http_host條件後  如果header的host被竄改掉,就會返回403  如果設定header的host正確or不設定header的host以預設值帶入,才會返回200 OK 設定正確的header的host:  不設定header的host以預設值帶入: 
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