Linux
单个端口
timeout 1 bash -c "echo >/dev/tcp/baidu.com/888" && echo open || echo closed
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端口范围
for i in {80..100}; do timeout 1 bash -c "echo >/dev/tcp/baidu.com/$i" && echo "$i open" || echo "$i closed"; done
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端口列表
for i in {80,3389}; do timeout 1 bash -c "echo >/dev/tcp/baidu.com/$i" && echo "$i open" || echo "$i closed"; done
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Windows
单个端口
powershell.exe -c "%{tnc -InformationLevel Quiet baidu.com -port 80}"
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powershell.exe -c "%{if(tnc -InformationLevel Quiet baidu.com -port 80){echo $_'----open'}else{echo $_'----close'}}"
端口范围
powershell.exe -c "80..90 | %{if(tnc -InformationLevel Quiet baidu.com -port $_){echo $_'----open';}else{echo $_'----close';}}"
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端口列表
powershell.exe -c "80,3389 | %{if(tnc -InformationLevel Quiet baidu.com -port $_){echo $_'----open';}else{echo $_'----close';}}"
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