Blogs

Last modified: January 30, 2014
  • But Open Source Software is unsupported. Isn’t it?

    Open Source is not unsupported It’s a common misconception that open source software means it’s unsupported, that if you want to have 7×24 support you have to buy commercial software. Nothing could be further from the truth. The reality is that open source software is written by professional coders, is fully production quality and support is available. The major difference between

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  • An Ending and An Opportunity

    A new milestone in the history and evolution of the Internet has passed: On Thursday, February 3, 2011, it was announced that the Internet Assigned Numbers Authority (IANA), steward of the Internet’s reserves of unassigned IP addresses, has distributed the final blocks of IPv4 addresses to the Regional Internet Registries (RIRs). The RIRs, based in North America, Europe, Asia, South

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  • DNSSEC and “lazy delegation”

    Prior to deploying DNSSEC it has been possible to perform something I’m calling “lazy delegation.” This is when a parent and direct child are served from the same name servers, so NS records in the parent are unnecessary in practice. While consulting with various clients about how to best deploy their DNSSEC, this is a common discovery. Often times someone

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  • Preparing for a world consisting of larger DNS responses.

    While many of you know ISC as the maintainer of the BIND DNS server software, we have always had our hand in the DNS operations field, including operating one of the 13 DNS root servers (F.ROOT-SERVERS.NET), as well as secondaring many ccTLD and non-commercial zones for over a decade. ISC has also been at the forefront of designing and implementing

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  • How to connect to a multi-homed server over TCP

    With the world wide deployment of IPv6 in parallel with IPv4, it has become apparent that a traditional connection loop is no longer good enough. In fact, this is a large part of the reason why Google is white listing resolvers and Yahoo only wants to return to AAAA records to DNS queries made over IPv6.  The traditional connection loop

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