PPT-DNS security

How DNS works Ask local resolver first about namegtIP mapping It returns info from cache if any If info not in cache resolver asks servers in DNS hierarchy that are authoritative for a given domain. Geoff . Huston,. George . Michaelson. APNIC Labs. October 2015. Recap: “Happy Eyeballs”. Plan A: . If you are Dual Stack and the service you are attempting to connect to . i. s Dual Stack then try to connect using V6 first, and if the connection attempt fails then try using V4 . Assessing their server availability.. Quantifying their world-wide delay performance.. How to improve delay performance by adding servers.. ABSTRACT. Conduct extensive and thorough measurements that accurately characterize the performance of two large-scale commercial CDNs: Akamai and Limelight.. Magda El Zarki. Prof. of CS. Univ. of CA, Irvine. Email: . elzarki@uci.edu. http: . www.ics.uci.edu. /~. magda. Network Address . Translation - NAT. 3. Private Network. Private IP . network is an IP network that is not directly connected to the Internet. Vijay Tinnanur & Jonathan Tuliani. Azure Networking. BRK3473. Agenda . Context. DNS . services in Azure. Introducing Azure DNS . Azure DNS Deep Dive. Demo . Context. Why DNS ?. Where is . www.contoso.com. II. ravel@sparcs. DNS. ravel. s. parcs.org. org. blog.naver.com. naver.com. com. 1. 10. 2. 3. 4. 5. 6. 7. 8. 9. DNS. s. parcs.org. DNS server. 인 동시에 . client!. as DNS client : resolver. search. Qurat-Ul-Ann Akbar, Northwestern U. . Marcel Flores, Northwestern U.. Aleksandar. Kuzmanovic, Northwestern U.. http://networks.cs.northwestern.edu. Internet Censorship is a prevalent problem . What is DNS?. 1. Domain Name System. The . Domain Name System (DNS) is used to resolve human-readable . hostnames . into machine-readable IP . addresses.. How does DNS Works?. 2. How Does DNS Works?. . Abhishek Madav(86378148). . Suhas Tikoo(22363556). . Urjit Khadilkar(24449837). Motivation. We plan to device . a heterogeneous service . that would monitor the resolution of the user’s . Sylvia Ratnasamy. http://inst.eecs.berkeley.edu/~ee122. /. Material thanks to Ion . Stoica. , Scott . Shenker. , Jennifer Rexford, Nick . McKeown. , and many other colleagues. Announcements. Project 3 out on Wednesday, Oct 30. Port numbers for applications. MAC addresses for . hardware. IP . addresses for a way to send data in a smart, routable way. Addressing So Far. Problems with MACs/IPs/Ports. Humans . are . bad at. remembering strings of numbers. Jun Ho Huh. Research Scientist. Cybersecurity Lab. . Saurabh Verma, . Ali Hamieh, Jun Huh Ho, Siva Raj Rajagopalan, Maciej Korczynski, Nina Fefferman.. . 1. Motivation . money talks!. . 2. It’s becoming very serious!. CS 526 . Omar Chowdhury. 12/9/2015. Topic: RBAC. 1. Reading for This Lecture. Optional:. First attack by . Schuba. and . Spafford. - . http://www.openbsd.org/advisories/sni_12_resolverid.txt. An Illustrated Guide to the . Id-NS Project – The National Secure DNS Initiatives. Muhammad Salahuddien – Deputy of Operation and Network Security. Growth, 90+ . M . users, 45+ . M . students, . 200. + Gb/s traffic (transit, IX, CDN), 200% rising local . Geoff Huston. APNIC. The Internet’s routing system works by rumour. “I tell you what I know, and you tell your mates, and your mates tell their mates, and …”. But what if I tell you a lie? . Or someone maliciously alters what I’m trying to tell you?.