http://www.t1shopper.com/tools/port-scan/#

https://hackertarget.com/port-check/

http://tool.chinaz.com/port

端口：

21,22,23,25,69,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,443,880,881,873,888,999,1158,1433,1521,2100,2121,2022,2222,3128,3306,389,5432,6080,8080,8081,8082,8083,8084,8085,8086,8087,8088,8089,8129,8888,9090,9999,1433,14334,33890,22222,33891,54321,55555