Blogs

  • BIND 9 Development at ISC

    ISC has begun implementing several methodology changes relating to BIND 9 development. The goals of these changes is to increase our software quality and relevance to you, our customers. Some of these are more internal, but we hope the outcome of these changes are that the effects are positive and noticed by those outside of ISC. As with all changes,

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  • Standardizing the Severity of Security Vulnerabilities

    Larissa Shapiro, ISC Product Manager ISC has recently become aware of a security advisory, CVE-2010-3762 filed against BIND 9 on October 5th 2010. ISC did not request this CVE, nor was it contacted by the submitter prior to its submission. We believe the reported severity assessment of this CVE to be higher than is realistic. Specifically, because a recursive operator

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  • F-Root Routing: How does it work?

    ISC uses an unusual routing configuration for the F-Root name server. While the configuration is relatively easy to understand, it’s hard to deduce by looking at the routing tables. We’ll explain it here! The network 192.5.4.0/23 is used for F-Root. The reasons for using this block are historical and unimportant, but the fact that it is a /23 is very

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  • Taking Back the DNS

    Most new domain names are malicious. I am stunned by the simplicity and truth of that observation. Every day lots of new names are added to the global DNS, and most of them belong to scammers, spammers, e-criminals, and speculators. The DNS industry has a lot of highly capable and competitive registrars and registries who have made it possible to

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  • Using the root DNSSEC key in BIND 9 resolvers

    To use the signed root zone in DNSSEC validation in your BIND 9 resolvers, you must be running BIND 9.6.2 or higher. Earlier versions do not support the required algorithms to enable validation using the root zone’s key. It is strongly recommended you run BIND 9.7 to use the automatic key updating functionality. The recommended procedure to use differs for

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  • What’s happening with DLV?

    Now that the root zone has been officially signed, what happens with ISC’s DNSSEC Look-aside Validation Registry? The short answer is, it gets smaller, but does not go away, at least not today. While having the root signed is a critically important step in the DNSSEC deployment effort, it is not the final step. It’s the one that enables a

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  • Backwards compatibility issues in BIND 9.7.0 and 9.7.1

    ISC has announced that there were some backwards compatibility problems in the 9.7.1 release. Here is a bit more information on the topic. These problems were also in 9.7.0. The first issue was a problem in how those versions of BIND 9 processed certain formats of negative responses. In particular, BIND 9’s internal logic expected certain records to be present

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  • Towards a DNSCERT Definition

    To mix metaphors, my e-mail has been ringing off the hook after my previous article (“Perspectives on a DNS-CERT“) and I’ve had to think deep and difficult thoughts about what we really mean by DNSCERT, and whether DNS-OARC really has the capability or really can grow the capability to operate such a thing. I’ve had some discussions with ICANN and

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  • BIND 9.7.2 and automatic DNSSEC signing

    BIND 9.7.0 introduced automatic in-server signature re-freshing and automatic key rollover.  This allows BIND 9.7, if provided with the DNSSEC private key files, to sign records as they are added to the zone, or as the signatures need to be refreshed.  This refresh happens periodically to spread out the load on the server and to even out zone transfer load.

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  • Open source *more* secure?

    I seem to read all the time that open source projects must be less secure, since the bad guys can look through the source code to find vulnerabilities. I was pleased to see an article today that takes the point of view that security through obscurity is not the right direction and that open source projects can be more secure than competing

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  • Imminent Death of Internet Predicted. Film at 11.

    The press seems to love stories of doom and gloom. And for almost as long as the Internet has been around, there have been dire predictions of some resource exhaustion, success disaster or security flaw that will destroy the internet. And who is the villain in this week’s piece? DNSSEC and the signing of all the root servers. While I

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  • DNSSEC Readiness

    DNSSEC is coming. Is your organization ready? The DNS community is buzzing with activity around the implementation of the DNS Security Extension, DNSSEC. In simple terms, DNSSEC provides a “chain of trust” within the DNS hierarchy and the authentication of DNS responses. Once deployed across the DNS, DNSSEC will render the infamous man-in-the-middle attack a thing of the past. But

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Last modified: November 1, 2016 at 1:25 pm