Nmap problem in BASH

floriankunushevci · 06-26-2015, 01:05 PM

Hi, i'am a new newbie in linux, i need a help in Bash Scripting, in nmap, i cant exectue an IP i want, on this script, it execute 0.0.0.0 and it says :
setup_target: failed to determine route to 0.0.0.....

Thank you, if anyone could help me.

Script is this :
#!/bin/bash
echo "Type 1 to go PortScan"
read aaa
if [ $aaa = "1" ]
then
echo "Type IP"
read nmapp
nmap $?/22 $nmapp
fi

MensaWater · 06-26-2015, 03:11 PM

I'm not sure what you think this line is supposed to do:
[CODE]nmap $?/22 $nmapp[\CODE]

If your intent is to check port 22 on the IP provided the line should be:
[CODE]nmap -p 22 $nmapp[\CODE]

$? means the return code from the previous command which would be zero (0) if successful. Your use of $? therefore is saying check IP 0 which expands to 0.0.0.0 which is why you see the errors.

If you run "man nmap" you can see documentation for the way to use this command.

floriankunushevci · 06-26-2015, 04:14 PM

Quote:

Originally Posted by MensaWater

I'm not sure what you think this line is supposed to do:
[CODE]nmap $?/22 $nmapp[\CODE]

If your intent is to check port 22 on the IP provided the line should be:
[CODE]nmap -p 22 $nmapp[\CODE]

$? means the return code from the previous command which would be zero (0) if successful. Your use of $? therefore is saying check IP 0 which expands to 0.0.0.0 which is why you see the errors.

If you run "man nmap" you can see documentation for the way to use this command.

Well u helped me alot with that -p but i want to listen all ports on example 127.0.0.* there, do u understand, if u can help me beacuse that -p helped me alot. Thank you, if u have anyidea please reply

joe_2000 · 06-26-2015, 04:29 PM

Quote:

Originally Posted by floriankunushevci

Well u helped me alot with that -p but i want to listen all ports on example 127.0.0.* there, do u understand, if u can help me beacuse that -p helped me alot. Thank you, if u have anyidea please reply

Just leave out the -p. It will then scan all ports. If you want to scan an ip range, you can specify it like so:

Code:

nmap 127.0.0.1-255

(although this ip range does not really make a lot of sense).
Alternatively, you can also use the netmask like so:

Code:

nmap 127.0.0.1/24

On a separate note please spell out your words completely / avoid using text message speak. This is considered impolite in this forum.

floriankunushevci · 06-26-2015, 05:09 PM

Quote:

Originally Posted by joe_2000

Just leave out the -p. It will then scan all ports. If you want to scan an ip range, you can specify it like so:

Code:

nmap 127.0.0.1-255

(although this ip range does not really make a lot of sense).
Alternatively, you can also use the netmask like so:

Code:

nmap 127.0.0.1/24

On a separate note please spell out your words completely / avoid using text message speak. This is considered impolite in this forum.

Yeah i try with script but it dosnt work, to scan all ports on that range, i dont know why
#!/bin/bash
echo "Shtypni 1 per te vazhduar NMAP"
read file
if [ $file = "1" ]
then
echo "[+]Shtyp IP[+]"
read nmapp
nmap /24 $nmapp
echo "[+]Scanimi perfundoi[+]"
fi

Habitual · 06-26-2015, 06:11 PM

Code:

#!/bin/bash
# LQRocks!
echo "Type 1 to go PortScan"
read SCAN_YES
if [ $SAN_YES = 1 ]; then
    echo "Type IP"
    read IP
    nmap "$IP" -p 22
else
    exit
fi

It's easier to code and debug if you have variables that actually mean something.
Leave off the "-p 22" if you want to scan for all ports on "$IP"