Asp finds the IP address of an Internet connected host. In order to find it, the peer hostname (not the FQDN), and the range of its possible IP addresses need to be specified. Those IP addresses could be simple IP addresses as 127.0.0.1 or “metaip” addresses as 127.0.0.1-20 or 127.0.0.*: the former is a simple way to avoid to type a lot of consecutive addresses, the latter is short for 127.0.0.1-254.

In order to simplify the management of the associations between hostnames and addresses, asp searches in a specified directory a text file containing the possible IP addresses of the looked for host. The name of the text file has to be formed by the hostname followed by an optional extension of your choice.

[ Linux man ]

First make sure you create this folder in your home dir: ~/.asp/

To find someones dunamic ip address you can provide his metaip address on standard input with this command: echo “61.11.89.90 60.11.89.70-98″ > ~/.asp/test After the file is written run asp, asp -v test