Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
Secondary DNS
Backup, Performance, & Peace of Mind
Secondary DNS Basics
Performance Benefits of
Secondary DNS
Misconceptions
Variations
Choosing a Provider
 There will be a 15 minute Q&A session at the end
of this webinar
 Please TWEET your questions @DNSMadeEasy
and use the ...
 Secondary DNS provides extra DNS redundancy for your domains.
 If your primary provider becomes unavailable, your query...
 Businesses that rely on single-homed DNS could
lose hundreds of millions of dollars in revenue… in
just a few hours.
 P...
 Secondary DNS actually
improves the performance of
your domains!
 By distributing your traffic
across 2 or more provide...
Misconceptions
 Secondary DNS is sometimes described as a BACKUP PLAN,
comparable to Failover.
 Instead of moving your q...
Variations
Secondary DNS
Primary / Secondary
$ dig ns example.com +short
ns5.dnsmadeeasy.com
ns6.dnsmadeeasy.com
ns7.dnsmadeeasy.com
ns1.example.co...
Primary / Secondary
Benefits
 Easy to setup and maintain
 The number of name servers
authoritative for your domain
are i...
AXFR / IXFR
 This method usually updates using a NOTIFY from the primary provider.
Otherwise, updates are detected by a s...
Hidden Primary
$ dig ns example.com +short
ns5.dnsmadeeasy.com
ns6.dnsmadeeasy.com
ns7.dnsmadeeasy.com
Hidden Primary
Benefits
 Complements in-house
infrastructure for global resiliency
and scalability
 Updates quickly
 No...
Primary / Primary
$ dig ns example.com +short
ns1.dnsmadeeasy.com
ns2.dnsmadeeasy.com
ns3.dnsmadeeasy.com
ns4.dnsmadeeasy....
Primary / Primary
Benefits
 Can use advanced features
like:
 Traffic direction, GeoIP
services, non-RFC compliant
config...
 Constellix DNS offers a Primary / Primary automated solution:
 Automatically makes API calls to update Primary DNS serv...
1. The Secondary DNS provider needs your Primary
provider’s DNS configuration:
 Primary / Secondary and Hidden Primary: R...
2. Add the appropriate NS records to your domains
 Hidden Primary: Only show the NS records of the
public/secondary DNS p...
Choosing a Provider
 Uptime history
 High availability
 Performance
 SEO
 Support
 Pricing
When choosing a Secondary...
Third Party Approved
Q & A
Tweet your questions @DNSMadeEasy using the
#DNSWebinar hashtag
 This webinar will be made available on the DNS
Made Easy blog: http://social.dnsmadeeasy.com/
 If you have any suggesti...
Upcoming SlideShare
Loading in …5
×

Secondary DNS: No Longer Just a Backup Plan

76 views

Published on

Topics Discussed:
The Basics of Secondary DNS
What you Probably Didn’t Know
Performance Benefits
Misconceptions
Variations of Secondary DNS
Primary / Secondary
Hidden Primary
Primary / Primary
Choosing a Secondary DNS Provider

Full recording: https://www.youtube.com/watch?v=cVzge-a-nnc

Published in: Technology
  • Be the first to comment

  • Be the first to like this

Secondary DNS: No Longer Just a Backup Plan

  1. 1. Secondary DNS Backup, Performance, & Peace of Mind
  2. 2. Secondary DNS Basics Performance Benefits of Secondary DNS Misconceptions Variations Choosing a Provider
  3. 3.  There will be a 15 minute Q&A session at the end of this webinar  Please TWEET your questions @DNSMadeEasy and use the #DNSWebinar hashtag Questions?
  4. 4.  Secondary DNS provides extra DNS redundancy for your domains.  If your primary provider becomes unavailable, your query traffic will automatically be served by your secondary provider.  Ensures 100% DNS uptime if your primary provider is downed. Secondary DNS Basics Secondary DNS could have saved hundreds of millions of dollars in revenue during the October 21st 2016 DDoS attack that took down Twitter, Reddit, and other top domains
  5. 5.  Businesses that rely on single-homed DNS could lose hundreds of millions of dollars in revenue… in just a few hours.  Poor network and infrastructure planning  Interdependencies: Financial services and 3rd party resources on your site could also be at risk.  Check your upstream providers and recommend that they look into adding an additional DNS provider. Impact on Business
  6. 6.  Secondary DNS actually improves the performance of your domains!  By distributing your traffic across 2 or more providers  Resolving name servers use RTT (Round Trip Time), which favors the better performing authoritative name servers.  This improves resolution and load times of your domain. Did You Know? $ dig ns example.com +short ns1.dnsmadeeasy.com 3 ms ns2.dnsmadeeasy.com 6 ms ns3.dnsmadeeasy.com 2 ms ns4.dnsmadeeasy.com 9 ms ns1.example.com 5 ms ns2.example.com 15 ms ns3.example.com 30 ms ns4.example.com 16 ms
  7. 7. Misconceptions  Secondary DNS is sometimes described as a BACKUP PLAN, comparable to Failover.  Instead of moving your query traffic from one provider to another, both providers are always authoritative for your domain’s traffic.  Secondary DNS can be expensive and difficult to set up.
  8. 8. Variations Secondary DNS
  9. 9. Primary / Secondary $ dig ns example.com +short ns5.dnsmadeeasy.com ns6.dnsmadeeasy.com ns7.dnsmadeeasy.com ns1.example.com ns2.example.com ns3.example.com ns4.example.com
  10. 10. Primary / Secondary Benefits  Easy to setup and maintain  The number of name servers authoritative for your domain are increased  Immediate transfer of zone information Disadvantages  Does not support advanced location-based configurations  Does not work with CDN’s  Only works with RFC compliant configurations
  11. 11. AXFR / IXFR  This method usually updates using a NOTIFY from the primary provider. Otherwise, updates are detected by a scheduled serial number check configured in your SOA record.  Zone information is shared or updated from the Primary DNS Provider to the Secondary using an AXFR or IXFR transfer.
  12. 12. Hidden Primary $ dig ns example.com +short ns5.dnsmadeeasy.com ns6.dnsmadeeasy.com ns7.dnsmadeeasy.com
  13. 13. Hidden Primary Benefits  Complements in-house infrastructure for global resiliency and scalability  Updates quickly  No need to redevelop existing DevOps tools  Extra layer of security  Hybrid Infrastructure Disadvantages  Must be RFC compliant
  14. 14. Primary / Primary $ dig ns example.com +short ns1.dnsmadeeasy.com ns2.dnsmadeeasy.com ns3.dnsmadeeasy.com ns4.dnsmadeeasy.com ns1.example.com ns2.example.com ns3.example.com ns4.example.com
  15. 15. Primary / Primary Benefits  Can use advanced features like:  Traffic direction, GeoIP services, non-RFC compliant configurations, weighted round robin, and ANAME records  Works great with CDN’s! Disadvantages  Can be more costly  Updates requires more labor  Both networks need to be updated to stay in sync  Need to use providers with similar features
  16. 16.  Constellix DNS offers a Primary / Primary automated solution:  Automatically makes API calls to update Primary DNS service when records are changed  More flexibility because Constellix is not RFC-compliant  Providers Constellix supports:  DNS Made Easy  AWS Route 53  Google Cloud  Microsoft Azure The Constellix Advantage
  17. 17. 1. The Secondary DNS provider needs your Primary provider’s DNS configuration:  Primary / Secondary and Hidden Primary: RFC- compliant zone updates using NOTIFY and AXFR/IXFR  Primary / Primary: Updates occur at each provider using an API or Control Panel Basic Setup
  18. 18. 2. Add the appropriate NS records to your domains  Hidden Primary: Only show the NS records of the public/secondary DNS provider.  Primary / Primary and Primary / Secondary: Need to add both NS records listed. 3. Notify your registrar that you added an additional provider  Hidden Primary: Only show the name servers of the public / secondary DNS provider.  Primary / Primary and Primary / Secondary: Need to list both name server lists. Basic Setup Cont’d
  19. 19. Choosing a Provider  Uptime history  High availability  Performance  SEO  Support  Pricing When choosing a Secondary DNS provider, you should use the same principals when evaluating a primary service provider to ensure your domain’s health.
  20. 20. Third Party Approved
  21. 21. Q & A Tweet your questions @DNSMadeEasy using the #DNSWebinar hashtag
  22. 22.  This webinar will be made available on the DNS Made Easy blog: http://social.dnsmadeeasy.com/  If you have any suggestions for future topics, please Tweet us @DNSMadeEasy and use the #DNSWebinar hashtag That’s All Folks

×