Introduction
asn.pl is a simple script to quickly and easily determine Autonomous System (AS) information for specified host(s).
An AS defines either a single network or a group of networks that is controlled by an administrative entity such as a business enterprise, a university etc. etc. AS's are assigned a globally unique number called a Autonomous System Number (ASN).
Download
Version |
Link |
|---|---|
1.0 |
Installation
Installation requires that Perl5 be installed. It is a standard package that is installed on most *nux systems.
To install asn.pl, ensure that you have root privileges and run:
make install
This will copy the asn.pl script into /usr/local/bin and the required perl modules into /usr/lib/site_perl.
Usage
Once installed, one can run the script by:
Usage: asn.pl <ipv4 address|dns address>
where the ipv4 address or the dns address of the node that you are interested in is supplied as the only argument.
The following example gathers the AS details of 'www.google.com'.
$ asn.pl www.google.com Getting ASN for www.google.com... IPv4: 66.102.7.99 DNS: www.google.com ASN: 15169 Descr: Google (Google, Inc)
The script has no user-specifiable options.
Comments and Suggestions
This package is maintained by Yee-Ting Li. Comments and suggestions are welcome.