Domain to IP/ASN/BGP block mapping script

Bash, Networking

Sleepless night. Reading more about Quagga and it’s options.

In meanwhile a quick 5min script to enable domain to BGP/IP/ASN mapping. This script is using basic dig command (for finding IP address) and Team Cymru whois service for IP to ASN/block mapping.

#!/bin/bash  
\# Script for domain name to IP/ASN/BGP block mapping  
hostname=v4.whois.cymru.com  
IP=$(dig $1 a +short)  
whois -h $hostname " -c -p $IP"

Yeah just 3 line script! Less code = more power! 

I set this one up as alias in ~/.bashrc. Here’s live working example:

anurag@laptop ~ $ bwhois he.net  
AS | IP | BGP Prefix | CC | AS Name  
6939 | 216.218.186.2 | 216.218.128.0/17 | US | HURRICANE - Hurricane Electric, Inc.

anurag@laptop ~ $ bwhois vsnl.in  
AS | IP | BGP Prefix | CC | AS Name  
4755 | 121.244.76.25 | 121.244.76.0/23 | IN | TATACOMM-AS TATA Communications formerly VSNL is Leading ISP

anurag@laptop ~ $ bwhois airtel.in  
AS | IP | BGP Prefix | CC | AS Name  
9498 | 125.19.17.20 | 125.19.17.0/24 | IN | BBIL-AP BHARTI Airtel Ltd.

anurag@laptop ~ $ bwhois rcom.co.in  
AS | IP | BGP Prefix | CC | AS Name  
18101 | 220.226.182.128 | 220.226.176.0/20 | IN | RELIANCE-COMMUNICATIONS-IN Reliance Communications Ltd.DAKC MUMBAI

Time for me to complete my CN file for tomorrow’s viva. Most boring & dumb work, but anyways have to do.

Feel free to leave comments below about just anything!