PPT-The Resolvers We Use Geoff Huston

APNIC Measuring the Internet via Users At APNIC weve been using online ads to measure the u sers view of the Internet for some years We ask users to fetch a unique URL This involves a DNS resolution and a HTTP GET to our servers. However synchros and resolvers have been and continue to be the preferred type of device where high reliability simplicity and ruggedness are required This is especially true of military and industrial control applications In this article Ken explai How resolvers work resolver sig nal format and how to use resolvers with com mercially available resolvertodigital converters adm tec Advanced Motion Technology Electrical Characteristics Electrically the Rotasyn like a traditional resolver is a tra 1 inch 11 inch 25 inch 10 inch 15 inch 21 inch 31 inch 55 inch 15 inch 21 inch Mounting System Servo Servo FlangeServo FlangeServo FlangeServo FlangeServo FlangeServo FlangeServo FlangeServo FlangeServo Flux Shield Technology ShaftMax Bore Sizes Shaf osaaorgarchives 1940 Bend Joe Huston Medfor d Bill Bowerman 207 Medford 1943 A Grant Jerry Lillie Klamath Union Frank Ramsey 60 Multnomah Stadium Portland B Grant Union Tom Johnson Taft H E Hermanson 126 1944 A Medford Al Simpson La Grande Ce ce Sher 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 . Geoff . Huston & George . Michaelson. . APNICLabs. September 2012. What are the questions?. What proportion of DNS resolvers are DNSSEC-capable?. What proportion of users are using DNSSEC-. validatingDNS. Team: Delta Sigma Pi. Geoffrey Pole. Amandeep Ghuman. Gabriela Suarez. Yu-Yu “Ellie” Lin. Agenda. Ellie Lin. The Challenge. To establish brand recognition and market share while resolving supply chain challenges without compromising the values of . Plaguing the Internet. DNS based DDoS attacks increasing. Late 2012 - DNS amplification remerges as a problem. January 2014 - new . innovation with . random subdomain attacks. Major attack . vector - open home gateways . Chief Scientist . APNIC Labs. Why pick on the DNS?. The DNS is very . easy . to. tap . and. tamper. DNS queries are open and unencrypted. DNS payloads are not secured and tampering cannot be detected. APNIC. Background. All computers run with some kind of internal oscillator (called a ‘clock’). This clock manages the internal state changes at each cycle of the central processing unit. Clock ‘ticks’ are fed to a digital counter. Huston. APNIC. February 2014. The E. volution of Evil. It used to be that . they sent . evil packets to . their . chosen . victim. but this exposed the attacker, and limited the damage they could cause. Why?. Because we’ve run. out of addresses. again. We’ve been here before .... The original . ARPAnet. design from 1969 used the NCP protocol, which used 8 bit addresses. Maximum network of 256 nodes. Chief Scientist, APNIC. Through the Routing Lens …. There are very few ways to assemble a single view of the entire Internet. The lens of routing is one of the ways in which information relating to the entire reachable Internet is bought together. in today’s Internet. Geoff Huston. APNIC . June 2016. What is being measured?. Clients who will perform DNSSEC validation of a domain name. Using RSA/SHA-1 as the crypto algorithm. Who will not resolve a badly-signed domain name.