Ever need an IP or port scanner but didn't have one installed or the permission to install one? Here's a quick trick I came up with using the little used built-in functions of the Windows Command-line:
for /L %A in (1,1,254) do ping -n 1 192.168.1.%A
FOR /L %A IN (1,1,254) DO FOR /L %B IN (1,1,1024) DO telnet 192.168.1.%A %B
Windows has a built-in for loop function and when used with the /L switch, it will act like a traditional counting for loop as in C and other program languages.
The code loops through values from 1 to 254, incrementing by 1 and pings 192.168.1.%A, where %A is the value of the loop variable.
The second line of code uses nested loops to telnet to IP addresses in the same range as above and port numbers from 1 to 1024 inclusive. There is a hitch where if it connects it just hangs there, but you can only work with what you got.
Here's a sample run:
for /L %A in (1,1,254) do ping -n 1 192.168.1.%A
FOR /L %A IN (1,1,254) DO FOR /L %B IN (1,1,1024) DO telnet 192.168.1.%A %B
Windows has a built-in for loop function and when used with the /L switch, it will act like a traditional counting for loop as in C and other program languages.
The code loops through values from 1 to 254, incrementing by 1 and pings 192.168.1.%A, where %A is the value of the loop variable.
The second line of code uses nested loops to telnet to IP addresses in the same range as above and port numbers from 1 to 1024 inclusive. There is a hitch where if it connects it just hangs there, but you can only work with what you got.
Here's a sample run:
IP Scanner
Port Scanner
Nice, thanks.
ReplyDeleteOne remark: the A variable need two %
for /L %%A in (1,1,254) do ping -n 1 192.168.1.%%A
I tried your code and got the following error:
ReplyDelete%%A was unexpected at this time.
It works. Thanks.
ReplyDeleteTwo percent symbols are used inside of batch files. If you're directly typing the command into the command prompt, you only use one.
ReplyDelete% = command prompt
%% = batch file.
good thanks
ReplyDelete