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 |
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1.1 |
Installation
Installation requires that Perl5 be installed. It is a standard package that is installed on most *nux systems.
If you have root privileges
run:
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make install |
This will copy the asn.pl script into /usr/local/bin and the required perl modules into /usr/lib/site_perl.
If you do not have root privileges
run:
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make install_local |
This will copy the asn.pl and required perl modules into your $HOME/bin directory.
Usage
Once installed, one can run the script by:
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$ asn.pl Usage: asn.pl <ipv4 address|dns address> |
If you have installed the script without root privileges, then run the asn.pl script with the command:
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$ $HOME/bin/asn.pl Usage: asn.pl <ipv4 address|dns address> |
The ipv4 address or the dns address of the node that you are interested in is supplied as the only argument.
The following example gathers the AS details of 'www.google.com'.
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$ 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.