read ip addresses from file in shell script

Yalla-One · 11-08-2009, 11:14 AM

Hi,

I have a text file of IP addresses, one IP address on each line, that i would like to ban in iptables.

Can anyone kindly advise of a simple, but robust, script to read a text file line by line and put its contents in a variable so that I can do a drop on each offender:

Code:

iptables -A INPUT -s $IP_ADDRESS_FROM_FILE -j DROP

Thanks in advance!

pixellany · 11-08-2009, 11:19 AM

The standard loop for this:

Code:

while read lin; do
    echo $lin
done < filename

Instead of "echo $lin", put in your desired code.

Yalla-One · 11-08-2009, 11:22 AM

Thanks! So it was that simple, eh? I incorrectly assumed that had to be a shortcut or maybe insecure since it was so short... silly me :-)
Thanks much!