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donchan922/port.sh

Created October 12, 2019 14:26
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port.sh
# 使用方法
$ telnet [hostname or IP] [port]
# リモートサーバのポートが空いている場合
$ telnet 192.168.1.2 22
Trying 192.168.1.2...
Connected to 192.168.1.2.
Escape character is '^]'.
SSH-2.0-OpenSSH_7.4p1 Raspbian-10+deb9u6
^]
telnet> q
Connection closed.
# リモートサーバのポートが閉じている場合
$ telnet 192.168.1.3 22
Trying 192.168.1.3...
telnet: connect to address 192.168.1.3: Connection refused
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