8-9 September 2014
Assembly Buildings
Europe/London timezone

Tales of the unexpected - handling unusual DNS client behaviour

9 Sep 2014, 10:00
Assembly Buildings

Assembly Buildings

2-10 Fisherwick Place Great Victoria Street Belfast Antrim BT1 6DW
Main Session


Ms Cathy Almond (Internet Systems Consortium)


Over recent months ISPs and other operators of Recursive DNS services have been reporting their experiences with unusual DNS query patterns both to the community and to their DNS software providers. Increasing attention is now being paid to the performance of recursive servers under different circumstances, including the evolution of various techniques to help manage client queries in a way that favours 'good' and minimises the impact of 'bad'. This talk looks at some of the problems that can be encountered and then presents for discussion the experimental features that are being tested with BIND currently as well as introducing other ideas that have been considered but not yet coded by ISC. Active discussion will be sought on all potential mitigation and tuning strategies, whether internal to DNS software or as part of an organisation's network infrastructure.

Primary author

Ms Cathy Almond (Internet Systems Consortium)

Presentation Materials