“Connection refused” vs “No route to host”

):

Trying172.1.2.1…

telnet: connect to address172.1.2.1: Connection refused

结论:说明No route to host是防火墙的返回,,先经过防火墙,不管端口有没有。然后如果通过了防火墙,但监听未启动,则提示Connection refused的错误。

当你能飞的时候就不要放弃飞

“Connection refused” vs “No route to host”

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