One of my friend asked me an interesting question about relating IPv4 with IPv6. His question was: in dual stack setup, if we have IPv4 of a router/host, how can we find IPv6 associated with it? Well, as far as I know there’s no direct way to relate IPv4 with IPv6 but there’s a nice trick out. Say e.g we have Google Public DNS operating at IPv4 - 8.8.8.8. To find IPv6 address of same server (if it exists at all), we can lookup for reverse DNS to get hostname, anurag@laptop:~$ dig -x 8.

You might have heard of NKN i.e National Knowledge Network by Govt. of India. Overall idea of NKN was to connect all educational institutions within country including all IIT’s, IIM’s, NIT’s and various govt. universities on fiber at 1Gbps speed. Though little late and crazy way of solving problem, but still NKN is nice effort from Mr Sam Pitroda. I was talking to a friend from IIT Delhi last week, and here’s his speedtest.

Whenever I see a new unknown IP range, it gets hard to find exact source of that IP within command shell. Recently, I found a very interesting source of that information from Team Cymru. Here’s the resource. I figured out (with a friend’s help) that using their whois server - v4.whois.cymru.com one can actually grab limited information as required. E.g anurag@laptop:~$ whois -h v4.whois.cymru.com " -v 8.8.8.8" AS | IP | BGP Prefix | CC | Registry | Allocated | AS Name 15169 | 8.

Today I read in news about Govt’s decision to finally end inter-circle roaming agreements between Airtel, Vodafone & IDEA. Well, the case is not new. It has been up with doT from over months and got highlights when CEO’s of all 3 firms wrote letter to Prime Minister of India for his intervention. Little background In 3G auction held in 2010, none of the operators got pan India spectrum across 22 telecom circles.

Yesterday I read about BSNL increasing speeds from 512Kbps to 1Mbps (with caps). Today I came across news in Business Line about Bharti Airtel increasing speed on wireline DSL. This is really good believe me! I am not refering to little bit increase in speeds, but I am refering to start of competition within ISP’s based on speed. Right now it’s Wireless (3G) Vs Wireline (DSL) players, and I am sure very soon we will see competition within wireline Vs wireline players.