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1 Recursive Client Rate limiting in BIND 9.9 Subscription Version

Several new tuning options for Recursive Server behaviour make their debut in BIND 9.9.6-S1. These features are intended to optimize recursive server behaviour in favor of good client queries, whilst at the same time limiting the impact of bad (cannot be…

2 Eleven, twelve; dig and delv: BIND 9.10

Delv Surely you remember the old nursery rhyme that begins with "One, two, buckle my shoe". You might have forgotten that its sixth verse is "Eleven, twelve, dig and delve". How many nursery rhymes have their own Wikipedia page? BIND 9.10 contains a new debugging…

3 Early refresh of cache records (cache prefetch) in BIND 9.10

A DNS resolver (recursive server) looks up information for its clients. When it finds an answer, it keeps a copy cached locally in addition to returning the answer to the requesting client. This ensures that if another request for the same information arrives,…

4 New Features in BIND 9.10

Response-rate limiting (DNS RRL) is now available by default ISC introduced the Response Rate Limiter into earlier versions of BIND as a configurable option. It was not automatically available. RRL has proven to be so valuable and effective that it is now…

5 Performance: Multi-threaded I/O

Starting in BIND 9.9.0, ISC has made some important changes regarding performance of BIND on multi-core machines. Among these is internal scaling of network traffic. This article describes this change. This feature is not available on the Windows version…

6 Inline Signing in ISC BIND 9.9.0 -- Examples

When DNSSEC was first introduced, the only way to sign DNS data was using the 'dnssec-signzone' utility; this would take an unsigned zone file and generate a new zone file containing signatures. This file would be loaded by named and served the same as any…