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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 Using the Response Rate Limiting Feature in BIND 9.9 ESV

RRL, or Response Rate Limiting, is an enhancement to the DNS protocol which serves as a mitigation tool for the problem of DNS amplification attacks. At this time, RRL implementation is only recommended for authoritative servers. DNS reply packets are usually…

3 A Quick Introduction to Response Rate Limiting

What is RRL? RRL, or Response Rate Limiting, is an enhancement to implementations of the DNS protocol that can help mitigate DNS amplification attacks (see KB article AA-00897). In such an attack, the attacker sends high volumes of forged DNS queries to a…

4 Using the Response Rate Limiting Feature in BIND 9.10

RRL, or Response Rate Limiting, is an enhancement to the DNS protocol which serves as a mitigation tool for the problem of DNS amplification attacks. At this time, RRL implementation is only recommended for authoritative servers. This article explains how…