Internet Governance and the Domain Name System: Issues for Congress
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Configuring DNS
Configuring DNS The Domain Name System (DNS) is a distributed database in which you can map hostnames to IP addresses through the DNS protocol from a DNS server. Each unique IP address can have an associated hostname. The Cisco IOS software maintains a cache of hostname-to-address mappings for use by the connect, telnet, and ping EXEC commands, and related Telnet support operations. This cache speeds the process of converting names to addresses. Note You can specify IPv4 and IPv6 addresses while performing various tasks in this feature. The resource record type AAAA is used to map a domain name to an IPv6 address. The IP6.ARPA domain is defined to look up a record given an IPv6 address. • Finding Feature Information, page 1 • Prerequisites for Configuring DNS, page 2 • Information About DNS, page 2 • How to Configure DNS, page 4 • Configuration Examples for DNS, page 13 • Additional References, page 14 • Feature Information for DNS, page 15 Finding Feature Information Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module. Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required. -
Adopting Encrypted DNS in Enterprise Environments
National Security Agency | Cybersecurity Information Adopting Encrypted DNS in Enterprise Environments Executive summary Use of the Internet relies on translating domain names (like “nsa.gov”) to Internet Protocol addresses. This is the job of the Domain Name System (DNS). In the past, DNS lookups were generally unencrypted, since they have to be handled by the network to direct traffic to the right locations. DNS over Hypertext Transfer Protocol over Transport Layer Security (HTTPS), often referred to as DNS over HTTPS (DoH), encrypts DNS requests by using HTTPS to provide privacy, integrity, and “last mile” source authentication with a client’s DNS resolver. It is useful to prevent eavesdropping and manipulation of DNS traffic. While DoH can help protect the privacy of DNS requests and the integrity of responses, enterprises that use DoH will lose some of the control needed to govern DNS usage within their networks unless they allow only their chosen DoH resolver to be used. Enterprise DNS controls can prevent numerous threat techniques used by cyber threat actors for initial access, command and control, and exfiltration. Using DoH with external resolvers can be good for home or mobile users and networks that do not use DNS security controls. For enterprise networks, however, NSA recommends using only designated enterprise DNS resolvers in order to properly leverage essential enterprise cybersecurity defenses, facilitate access to local network resources, and protect internal network information. The enterprise DNS resolver may be either an enterprise-operated DNS server or an externally hosted service. Either way, the enterprise resolver should support encrypted DNS requests, such as DoH, for local privacy and integrity protections, but all other encrypted DNS resolvers should be disabled and blocked. -
Chapter 2. Application Layer Table of Contents 1. Context
Chapter 2. Application Layer Table of Contents 1. Context ........................................................................................................................................... 1 2. Introduction .................................................................................................................................... 2 3. Objectives ....................................................................................................................................... 2 4. Network application software ....................................................................................................... 2 5. Process communication ................................................................................................................. 3 6. Transport Layer services provided by the Internet ....................................................................... 3 7. Application Layer Protocols ........................................................................................................... 4 8. The web and HTTP .......................................................................................................................... 4 8.1. Web Terminology ................................................................................................................... 5 8.2. Overview of HTTP protocol .................................................................................................... 6 8.3. HTTP message format ........................................................................................................... -
Analysis of Malware and Domain Name System Traffic
Analysis of Malware and Domain Name System Traffic Hamad Mohammed Binsalleeh A Thesis in The Department of Computer Science and Software Engineering Presented in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy at Concordia University Montréal, Québec, Canada July 2014 c Hamad Mohammed Binsalleeh, 2014 CONCORDIA UNIVERSITY Division of Graduate Studies This is to certify that the thesis prepared By: Hamad Mohammed Binsalleeh Entitled: Analysis of Malware and Domain Name System Traffic and submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy complies with the regulations of this University and meets the accepted standards with respect to originality and quality. Signed by the final examining committee: Chair Dr. Christian Moreau External Examiner Dr. Nadia Tawbi Examiner to Program Dr. Lingyu Wang Examiner Dr. Peter Grogono Examiner Dr. Olga Ormandjieva Thesis Co-Supervisor Dr. Mourad Debbabi Thesis Co-Supervisor Dr. Amr Youssef Approved by Chair of the CSE Department 2014 Dean of Engineering ABSTRACT Analysis of Malware and Domain Name System Traffic Hamad Mohammed Binsalleeh Concordia University, 2014 Malicious domains host Command and Control servers that are used to instruct in- fected machines to perpetuate malicious activities such as sending spam, stealing creden- tials, and launching denial of service attacks. Both static and dynamic analysis of malware as well as monitoring Domain Name System (DNS) traffic provide valuable insight into such malicious activities and help security experts detect and protect against many cyber attacks. Advanced crimeware toolkits were responsible for many recent cyber attacks. In order to understand the inner workings of such toolkits, we present a detailed reverse en- gineering analysis of the Zeus crimeware toolkit to unveil its underlying architecture and enable its mitigation. -
Internet Governance Project
International internet Policy Priorities United States Department of Commerce, National Telecommunications and Information Administration (NTIA) [Docket No. 180124068–8068–01] RIN 0660–XC041 The Internet Governance Project (IGP) is a group of professors, postdoctoral researchers and students hosted at the Georgia Institute of Technology’s School of Public Policy. We conduct scholarly research, produce policy analyses and commentary on events in Internet governance, and bring our ideas and proposals directly into Internet governance processes. We also educate professionals and young people about Internet governance in various world regions. IGP welcomes NTIA’s broadly focused NOI on “International Internet Policy Priorities.” We believe that agency is asking many of the right questions and appreciate its desire to look for guidance from the public. Our response will follow the template of the NOI. I. THE FREE FLOW OF INFORMATION AND JURISDICTION A. What are the challenges to the free flow of information online? There are two distinct challenges to the free flow of information. The biggest and most fundamental is alignment,1 which is related to the issue of jurisdiction. Alignment refers to the attempt by national governments to assert sovereignty over cyberspace, by imposing exclusive territorial jurisdiction and national controls in a globally interoperable cyberspace. Data localization is one obvious example of a policy that seeks to achieve alignment, but the process is evident in multiple domains of Internet governance: in cybersecurity policy, trade policy, intellectual property protection and content regulation. In each case states erect barriers that 1 The concept of alignment was described in the book Will the Internet Fragment? (Polity Press, 2017). -
Internet Domain Name System
IINNTTEERRNNEETT DDOOMMAAIINN NNAAMMEE SSYYSSTTEEMM http://www.tutorialspoint.com/internet_technologies/internet_domain_name_system.htm Copyright © tutorialspoint.com Overview When DNS was not into existence, one had to download a Host file containing host names and their corresponding IP address. But with increase in number of hosts of internet, the size of host file also increased. This resulted in increased traffic on downloading this file. To solve this problem the DNS system was introduced. Domain Name System helps to resolve the host name to an address. It uses a hierarchical naming scheme and distributed database of IP addresses and associated names IP Address IP address is a unique logical address assigned to a machine over the network. An IP address exhibits the following properties: IP address is the unique address assigned to each host present on Internet. IP address is 32 bits 4bytes long. IP address consists of two components: network component and host component. Each of the 4 bytes is represented by a number from 0 to 255, separated with dots. For example 137.170.4.124 IP address is 32-bit number while on the other hand domain names are easy to remember names. For example, when we enter an email address we always enter a symbolic string such as [email protected]. Uniform Resource Locator URL Uniform Resource Locator URL refers to a web address which uniquely identifies a document over the internet. This document can be a web page, image, audio, video or anything else present on the web. For example, www.tutorialspoint.com/internet_technology/index.html is an URL to the index.html which is stored on tutorialspoint web server under internet_technology directory. -
The Future of Internet Governance: Should the United States Relinquish Its Authority Over ICANN?
The Future of Internet Governance: Should the United States Relinquish Its Authority over ICANN? Lennard G. Kruger Specialist in Science and Technology Policy September 1, 2016 Congressional Research Service 7-5700 www.crs.gov R44022 The Future of Internet Governance: Should the U.S. Relinquish Its Authority over ICANN Summary Currently, the U.S. government retains limited authority over the Internet’s domain name system, primarily through the Internet Assigned Numbers Authority (IANA) functions contract between the National Telecommunications and Information Administration (NTIA) and the Internet Corporation for Assigned Names and Numbers (ICANN). By virtue of the IANA functions contract, the NTIA exerts a legacy authority and stewardship over ICANN, and arguably has more influence over ICANN and the domain name system (DNS) than other national governments. Currently the IANA functions contract with NTIA expires on September 30, 2016. However, NTIA has the flexibility to extend the contract for any period through September 2019. On March 14, 2014, NTIA announced the intention to transition its stewardship role and procedural authority over key Internet domain name functions to the global Internet multistakeholder community. To accomplish this transition, NTIA asked ICANN to convene interested global Internet stakeholders to develop a transition proposal. NTIA stated that it would not accept any transition proposal that would replace the NTIA role with a government-led or an intergovernmental organization solution. For two years, Internet stakeholders were engaged in a process to develop a transition proposal that will meet NTIA’s criteria. On March 10, 2016, the ICANN Board formally accepted the multistakeholder community’s transition plan and transmitted that plan to NTIA for approval. -
The Regional Internet Registry System Leslie Nobile
“How It Works” The Regional Internet Registry System Leslie Nobile v Overview • The Regional Internet Registry System • Internet Number Resource Primer: IPv4, IPv6 and ASNs • Significant happenings at the RIR • IPv4 Depletion and IPv6 Transition • IPv4 transfer market • Increase in fraudulent activity • RIR Tools, technologies, etc. 2 The Regional Internet Registry System 3 Brief History Internet Number Resource Administration • 1980s to 1990s • Administration of names, numbers, and protocols contracted by US DoD to ISI/Jon Postel (eventually called IANA) • Registration/support of this function contracted to SRI International and then to Network Solutions • Regionalization begins - Regional Internet Registry system Jon Postel forms • IP number resource administration split off from domain name administration • US Govt separates administration of commercial Internet (InterNIC) from the military Internet (DDN NIC) 4 What is an RIR? A Regional Internet Registry (RIR) manages the allocation and registration of Internet number resources in a particular region of the world and maintains a unique registry of all IP numbers issued. *Number resources include IP addresses (IPv4 and IPv6) and autonomous system (AS) numbers 5 Who Are the RIRs? 6 Core Functions of an RIR Manage, distribute -Maintain directory -Support Internet and register Internet services including infrastructure through Number Resources Whois and routing technical coordination (IPv4 & IPv6 registries addresses and Autonomous System -Facilitate community numbers (ASNs) -Provide -
IANA Report on Recognition of Afrinic As a Regional Internet Registry
IANA Report Subject: Recognition of AfriNIC as a Regional Internet Registry Date: 6 April 2005 The Internet Assigned Numbers Authority (the IANA), as part of the administrative functions associated with management of the Internet Protocol (IP) address space, is responsible for evaluating applications for approval of new Regional Internet Registries. ICANN has received an application for final approval and recognition of the African Internet Numbers Registry (AfriNIC) as the fifth Regional Internet Registry (RIR). Background The role and responsibilities of ICANN/IANA in this area are defined in the Address Supporting Organization Memorandum of Understanding <http://www.icann.org/aso/aso- mou-29oct04.htm> (ASO MOU), and ICP-2 <http://www.icann.org/icp/icp-2.htm> ("Criteria for Establishment of New Regional Internet Registries"). In September 2004, an application was submitted by the AfriNIC organization for recognition, together with a detailed transition which included draft bylaws, policies, funding model, and staff resumes. On request of the ICANN President, the IANA staff conducted a preliminary evaluation. In September 2004 the President reported to the Board his conclusion that the application and transition plan constituted a reasonable basis for eventual recognition, though he noted that some adjustments would be necessary. Also in September 2004, the existing RIRs, APNIC, ARIN, LACNIC and RIPE NCC, through the Number Resource Organization (NRO), issued a statement expressing their ongoing and continuing support for AfriNIC, and recommending a favorable response to the application by recognizing AfriNIC's accomplishments thus far. Consistent with the IANA©s preliminary evaluation and the recommendations of the existing RIRs, the ICANN Board on 30 September 2004 gave provisional approval <http://www.icann.org/minutes/resolutions-30sep04.htm> to the AfriNIC application, with the expectation that the transition plan would be completed and an amended or revised application for recognition would be submitted. -
About the Internet Governance Forum
About the Internet Governance Forum The Internet Governance Forum (IGF) – convened by the United Nations Secretary-General – is the global multistakeholder forum for dialogue on Internet governance issues. BACKGROUND AND CONTEXT 1 The IGF as an outcome of WSIS 2 IGF mandate 2 THE IGF PROCESS 3 IGF annual meetings 3 Intersessional activities 4 National, regional and youth IGF initiatives (NRIs) 5 PARTICIPATION IN IGF ACTIVITIES 6 Online participation 6 COORDINATION OF IGF WORK 7 Multistakeholder Advisory Group 7 IGF Secretariat 7 UN DESA 7 FUNDING 7 IMPACT 8 LOOKING AHEAD: STRENGTHENING THE IGF 8 The IGF in the High-level Panel on Digital Cooperation’s report 8 The IGF in the Secretary-General’s Roadmap for Digital Cooperation 9 9 1 BACKGROUND AND CONTEXT The IGF as an outcome of WSIS Internet governance was one of the most controversial issues during the first phase of the World Summit on the Information Society (WSIS-I), held in Geneva in December 2003. It was recognised that understanding Internet governance was essential in achieving the development goals of the Geneva Plan of Action, but defining the term and understanding the roles and responsibilities of the different stakeholders involved proved to be difficult. The UN Secretary-General set up a Working Group on Internet Governance (WGIG) to explore these issues and prepare a report to feed into the second phase of WSIS (WSIS-II), held in Tunis in November 2005. Many elements contained in the WGIG report – developed through an open process and multistakeholder consultations – were endorsed in the Tunis Agenda for the Information Society (one of the main outcomes of WSIS-II). -
Ipv6 – What Is It, Why Is It Important, and Who Is in Charge? … Answers to Common Questions from Policy Makers, Executives and Other NonTechnical Readers
IPv6 – What is it, why is it important, and who is in charge? … answers to common questions from policy makers, executives and other nontechnical readers. A factual paper prepared for and endorsed by the Chief Executive Officers of ICANN and all the Regional Internet Registries, October 2009. 1. What is IPv6? “IP” is the Internet Protocol, the set of digital communication codes which underlies the Internet infrastructure. IP allows the flow of packets of data between any pair of points on the network, providing the basic service upon which the entire Internet is built. Without IP, the Internet as we know it would not exist. Currently the Internet makes use of IP version 4, or IPv4, which is now reaching the limits of its capacity to address additional devices. IPv6 is the “next generation” of IP, which provides a vastly expanded address space. Using IPv6, the Internet will be able to grow to millions of times its current size, in terms of the numbers of people, devices and objects connected to it1. 2. Just how big is IPv6? To answer this question, we must compare the IPv6 address architecture with that of IPv4. The IPv4 address has 32 bits, allowing today’s Internet to connect up to around four billion devices. By contrast, IPv6 has an address of 128 bits. Because each additional bit doubles the size of the address space, an extra 96 bits increases the theoretical size of the address space by many trillions of times. For comparison, if IPv4 were represented as a golf ball, then IPv6 would be approaching the size of the Sun.2 IPv6 is certainly not infinite, but it is not going to run out any time soon. -
Internet Governance and the Move to Ipv6
Internet Governance and the move to IPv6 TU Delft April 2008 Alex Band & Arno Meulenkamp Internet Governance Community Policies Internet Resource Statistics IPv6 2 Internet Governance ISOC IETF ICANN / IANA RIRs 4 The 5 RIRs 5 What is RIPE NCC? RIPE NCC is –a Network Coordination Center –an independent organisation –a not-for-profit membership association –one of the 5 Regional Internet Registries 6 Registration 7 Goals of the IR System: Registration Why? Ensure uniqueness of IP address space usage Provide contact information for network operators How? RIPE Database Results: IP address space allocated uniquely Contact information available for Internet resources 8 Aggregation 9 Goals of the IR System: Aggregation Why? Routing table grows fast Provide scalable routing solution for the Internet How? Encourage announcement of whole allocations (min /21) Introduction of Classless Inter Domain Routing (CIDR) Results: Growth of routing table slowed down 10 Conservation 11 Goals of the IR System: Conservation Why? IP address space is limited resource Ensure efficient usage How? Introduction of CIDR Community based policies to ensure fair usage Results: IP address space consumption slowed Address space allocated on ‘need to use’ basis 12 IP address distribution IANA RIR LIR /23 /25 /25 End User Allocation PA Assignment PI Assignment 13 Community Policies Policy Development Cycle Need Evaluation Proposal Execution Discussion Consensus 15 How policy is made ICANN / IANA ASO AfriNIC RIPEReach NCC consensus ARIN across communitiesAPNIC LACNIC AfriNIC