Sweeping Lame DNS Delegations A Proposal DNS OPS SIG APNIC 15, Taipei, Taiwan 26 February 2003.

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Presentation transcript:

Sweeping Lame DNS Delegations A Proposal DNS OPS SIG APNIC 15, Taipei, Taiwan 26 February 2003

Problem 10-15% of all reverse DNS domains managed under APNIC are ‘lame’ –Lame DNS increase traffic to DNS root servers –Lame DNS inconveniences end users –Lame DNS inconveniences unrelated third parties Fixing Lame DNS requires top-down coordination

Proposal APNIC uses domain: objects in whois to manage reverse DNS delegation –Changing domain object changes DNS APNIC Secretariat is measuring and identifying lame DNS records already for statistical purposes –Proposed to add a ‘disable’ function to DNS zone generation –Mark Lame DNS domain: objects disabled –Notify Maintainer, permit re-enabling

Details 30 Day notice of LAME DNS status –Countdown timer –Countdown resets if DNS fixed – to maintainer during 30 day window At end, record marked disabled –Monthly reminder to maintainer Tests see ‘intermittent’ lame DNS –Only persistently lame disabled Lame for 30 days or more

Process to re-enable Disable flag is extra Remark: field in domain object To Re-enable, update whois domain: object to remove the Remark: field added by APNIC systems. Domain object must meet normal DNS requirements when re-submitted –Minimum 2 nserver: entries, tested live

Other RIRs ARIN –Adopted similar mechanism, will be reviewed at ARIN-XI LACNIC –Measure and record lame DNS daily, considering proposal to disable at next LACNIC meeting RIPE-NCC –Measure only at this stage

Reporting Add standing report to DNS OPS SIG –Number of lame DNS records detected –Rate of disabling, re-enabling –Additional reports to IEPG, NANOG, SANOG etc Coordination with other RIRs –May vary process timing, extend process Review process in DNS-SIG –RIR and other modifications/proposals should be subject to DNS-SIG review

Benefits of this proposal Improved DNS services –Reduction of load on root DNS servers –Improved Internet connection times –Better logging of connections