Usage

By default anonip reads from the standard input and writes to standard output, and this must be the easiest way to use it:

$ cat mylog.txt | anonip > mylog_anon.txt

The same behaviour can be obtained using command line arguments:

$ anonip -i mylog.txt -o mylog_anon.txt

With every run anonip uses a new seed for the random generator:

$ echo 12.34.56.78 | ./anonip
208.74.233.198
$ echo 12.34.56.78 | ./anonip
22.66.73.190
$ echo 12.34.56.78 | ./anonip
30.136.32.50

If for some reason you need to use the same transformation, you can use the -s option

$ echo 12.34.56.78 | ./anonip -s mys3cr3t
20.44.206.14
$ echo 12.34.56.78 | ./anonip -s mys3cr3t
20.44.206.14

 This will also produce the same result on other machines.

If you need to process large files, and you know there will be no netmasks in IP notation (ie 255.255.224.0) , you might want to use the -m option to speed things up.