portscan

a shell script to scan open port using nc

How to use

you can use -h option to show usage.

./portscan -h
usage: ./portscan.sh [-s server] [-h] <-p port>
	-s server
	-p port,80 or 1000-2000(from 1000 to 2000) or 22,80(scan 22 and 80)
	-h display this help and exit

Example

./portscan.sh -s localhost -p 1-1024 # scan localhost, port from 1 to 1024

result as follow:

Server         	Port 	Protocol       
localhost      	22   	[tcp/ssh]      
localhost      	53   	[tcp/domain]   
localhost      	631  	[tcp/ipp]

it is shown that port 22,53,631 is open, and all of their protocols is tcp.

./portscan.sh -s github.com -p 80 # fetch github:80

result:

Server         	Port 	Protocol       
github.com     	80   	[tcp/http]

it is shown that github.com:80 is open!

./portscan.sh -s localhost -p 22,53,631,3306

output:

Server         	Port 	Protocol       
localhost      	22   	[tcp/ssh]      
localhost      	53   	[tcp/domain]   
localhost      	631  	[tcp/ipp]      
localhost      	3306 	[tcp/mysql]    

pull request & issues

Yes, welcome!