domain name system
TRANSCRIPT
Domain Name System
Brian (Yoohyun) KimProduct Marketing manager at CDNetworksMay, 2015
Contents • About Domain Name System (DNS)
• DNS Selection
• CDNetworks Cloud DNS Service
What is Domain Name System?
• Domain Name System – Phonebook for internet Mapping domain names to IP address by designating authoritative name servers
Why is DNS important?
• Incurring a loss of your internet business DNS is the gateway to the internet world and it is directly related with the availability for your
internet business If DNS errors happened, it incurs a great loss of your business
DNS errors causes you to incur a great loss of business
PayPal • DNS Error for 4.5 hours(‘2010)
• Led to a problem with web server & incurred a loss of 40M USD$
Register.com • Service unavailable error by DDoS attack to DNS
• http://isc.sans.edu/diary.html?storyid=9931
DNS made Easy • DNS error by 50Gbps DDoS attckhttp://www.theregister.co.uk/2010/08/09/dns_service_monster_ddos/
ULTRADNS • Major websites(amazon.com, wal-mart.com, salesforce.com and etc) service unavailable error by DDoS attack●●
DNS outage, slow, unreliable ●
NY Times’ website shut down in cyber attackhttp://thenextweb.com/twitter/2013/08/27/twitters-whois-records-altered-syrian-electronic-army-takes-responsibility/
Go Daddy DNS outage takes out thousands of siteshttp://www.networkcomputing.com/security/godaddy-outage-a-harsh-reminder-that-ent/240007312
Why is DNS difficult to build?
• Domain Name System is a critical piece of internet infrastructure It is difficult to meet these all DNS’s key requirements of Service availability, high performance,
reliability, security, scalability and simple management. Furthermore, low cost!!
DNS Selection - #1. In-house
• Difficulty of Domain management, high risk & TCO For DNS, it requires expertized IT staff and huge initial investment for infrastructure And it requires redundant geographic datacenter
DNS Selection - #2. Internet Service Provider
• Specific ISP dependency, Low performance, Scalability & security DNS is not a main business of Internet Service Provider So limited infrastructure and expertise brings the limitation of quick scalability and performance
CDNetworks’ Cloud DNS service
• Can be both technically intimidating and financially challenging Cloud DNS is secure, reliable and scalable, also offers high performance under any traffic
conditions from anywhere in the world
Thank you
Brian (Yoohyun) KimProduct Marketing Manager| CDNetworks
[email protected] http://yoohyunkim.blogspot.com