Security Architectures and Advanced Networks Ken Klingenstein

Security Architectures and Advanced Networks § Ken Klingenstein § Day Job: Middleware § Night Job: Network Security

Security Topics § Educause/Internet 2 Security Task Force • Effective Practices • I 2 Resource Commitments § REN-ISAC § S@LS workshop § SALSA – a steering group for advanced network/security technologies § Federated security services • Collaborative incident analysis • New security-aware capabilities § Going forward CHANGE DATE 2

EDUCAUSE/Internet 2 Security Task Force § Overarching umbrella for a variety of coordinated security § Activities include education and awareness, policy, technologies, etc. § Two important recent activities • Effective Practices http: //www. educause. edu/security/guide/ • NSF Security at Line Speed Workshop CHANGE DATE 3

S@LS Workshop 2003 § NSF Sponsored workshop, in conjunction with Indiana University, Internet 2, the Massachusetts Institute of Technology and the University of Washington. § 1. 5 day Workshop, held in Chicago, Illinois, 12 -13 Aug 2003 § Extensive on-line follow-up discussion to refine and recover § White paper is at http: //apps. internet 2. edu/sals/ CHANGE DATE 4

By “Line Speed”, we really mean… §High bandwidth §Exceptional low latency, e. g. remote instrument control §End-to-end transparency, e. g. Grids §Exceptional low jitter, e. g. real time interactive HDTV §Advanced features, e. g. multicast CHANGE DATE 5

S@LS Security topics § Information leakage: access to data by unauthorized parties § Integrity violation: destruction, modification, or falsification of data § Illegitimate use: Access to resources (processing cycles, storage or network) by unauthorized users § Denial of Service: Preventing legitimate users from accessing resources CHANGE DATE 6

Security x High Performance § Difficulty in realizing performance in end-end high bandwidth connections § Difficulty in deploying and using videoconferencing § Difficulty in deploying grids § Limited remote instrument control use § Lack of scalable approaches § Inability to identify what’s broken § Things not broken but just incompatible CHANGE DATE 7

Environmental Scan: Requirements of R&E § Cyberdiversity of machines and instruments on net § Mobility requirements of machines § Mobility requirements of users § Highly distributed network management § Distinctive privacy and security needs as public and academic institutions § Inter-institutional collaborations predominate and create exceptional widearea needs § Widespread needs and limited resources preclude expensive point solutions § University=federation of hundreds of disparate and autonomous businesses CHANGE DATE 8

Tradeoffs § Host versus border security § Deny/Allow versus Allow/deny approaches § Unauthenticated versus authenticated network access § Central versus end-user management § Server-centric versus client-centric § False positives versus zero-day attacks § Organizational priorities between security and performance § Perimeter protection versus user/staff confusion CHANGE DATE 9

Trends § More aggressive and frequent attacks, resulting in • • • Desktop lockdowns and scanning New limits at the perimeter Increased tunneling and VPN’s More isolation approaches, straining the top of the desk Hosts as clients only § Changes in technology • • Rise of encyption New attack vectors, such as P 2 P Higher speeds make for more expensive middleboxen Convergence of technology forces § New policy drivers • DHS, RIAA, etc. • LCD solutions to hold down costs CHANGE DATE 10

General Findings §First, and foremost, this is getting a lot harder § 2003 seems to mark a couple of turning points • New levels of stresses • Necessary but doomed approaches §High performance security is approached by a set of specific tools that are assembled by applying general architectural principles to local conditions. §The concept of the network perimeter is changing; desktop software limits security and performance options §There are interactions with the emerging middleware layer that should be explored §Tool integration is an overarching problem §We are entering diagnostic hell CHANGE DATE 11

The Tool Matrix § For a variety of network and host based security tools, • • • Role in prevention/detection/reaction/analysis Description General issues Performance implications Operational Impacts § Network Tools include host scanning, MAC registration, VLAN, Encrypted VPN’s and/or Layer 3 VPN’s, Firewalls, Source Address Verification, Port Mirroring, etc… § Host Tools include host-based encryption, local firewalls, host-based intrusion detection/prevention, secure OS, automated patching systems, etc. CHANGE DATE 12

The Architectural Frameworks § The virtual perimeter: a mix of perimeter defenses, careful subnetting, and desktop firewalls § Open and closed networks § Separation of internal and external servers (e. g. SMTP servers, routers, etc…) § Managed and unmanaged desktops § Client versus client/server desktop orientation § Types of authenticated network access control CHANGE DATE 13

Local Factors § Size of class B address space § Local fiber plant § Medical school § Geographic distribution of departments on campuses § Distance to gigapops § Policy Authority of Central IT § Desktop diversity §… CHANGE DATE 14

Case Studies/Examples § Generic Academic Case § Novel Academic Alternative § LBL and Bro § Lightly Authenticated Wireless Network § Denial of Service Protection § Network Auditing at CMU CHANGE DATE 15

Case Study Structure § Background and Intro § Alternative Approaches and Selected Implementation § Pros and Cons • Specifics on attack vectors • Ramifications on advanced computing • etc CHANGE DATE 16

SALSA Overview § Technical steering committee composed of senior campus security architects • Create understanding in the community regarding the multiple aspects of security as it applies to advanced networking • Advise on deliverables that address need of members and produce tangible benefits § Prioritizing opportunities and identifying resources • Focused activities • Interested in R&D security topics that can be smoothly transitioned to deployment • Intended to complement other activities in the Internet 2/EDUCAUSE Security Task Force CHANGE DATE 17

Membership § Chair: Mark Poepping, CMU § Founding members drawn from the Security at Line Speed Workshop – e. g. Jeff Schiller (MIT), Terry Grey (UW), Jim Pepin (USC), Doug Pearson (Indiana), Chris Misra (UMass), Steve Wallace (Indiana), Rodney Petersen (EDUCAUSE), James Sankar (Ukerna), etc… § Working on a charter § Minutes, etc at http: //security. internet 2. edu/salsa. html CHANGE DATE 18

Possible SALSA Priorities § Developing core security architecture • Common campus network reference model • Common R&E internet network reference model • Nomenclature and architecture § Additional case studies for S@LS and revisit the basics § Increase data collection, sharing and integration between security researchers and backbone activities § Net Authentication/Authorization § Federated Security Services and Capabilities CHANGE DATE 19

Data Sharing § Assemble knowledge, experience and tools to identify useful security data to be directed towards a comprehensive, operational security solution § Identify associated privacy issues. § Working with REN-ISAC on plan, process and structure to share data: • • Data guidelines Information exchange frameworks Sharing agreements Escalation process § Increase integration and sharing between security researchers and network backbone activities (e. g. , diagnostics, Abilene Observatory) CHANGE DATE 20

Network Auth. N/Auth. Z § Identify areas where middleware technologies can support intra and inter-realm security § Network access controls may depend on • • • The identity of the user The identity of the device The state of the device (scanned, patched, etc) The role of the user Other § Initiating organized activities to develop network authentication and authorization architectures and sample implementations, including responding to the TERENA mobility TF § http: //www. terena. nl/tech/task-forces/tf-ngn/presentations/tfngn 13/20040122_JR_GN 2_JRA 5. pdf CHANGE DATE 21

Federated Security Services §Federated networks • Share a common network substrate • Share a common trust fabric • Together they could permit… §Collaborative incident analysis and response • Network-wide views • Leveraged diagnostic help • Ability for automated tools to use distributed monitors • Protect privacy at several layers §Security-aware capabilities • Trust-moderated transparency • Integrated security/performance diagnostics §Moving it into the broader Internet CHANGE DATE 22

Collaborative Incident Analysis § Moving beyond the “border” to see network-wide views • I’m seeing activity X? Are others seeing it? What variants are they seeing? Real-time attack recognition • From the central observatory, let me see the full address of the attacking node at site Y in the federation • I’m seeing an attack ostensibly from source address z at enterprise Y. Let me look at logging within site Y to verify • Correlate signatures and traffic among sites A-Z to provide an early warning system of DDOS • Let external experts from site Z examine our forensic information to assist our diagnostics § Requires federated backbone (meters, log files, etc) and federated trust fabric (for scaling, role-based access control, contact info, etc. ) CHANGE DATE 23

Collaborative incident analysis §Scaling requires managing large data sets • Centralized – the Abilene Observatory, perhaps others • Distributed – on a per enterprise level §Which in turn requires a clear data model • Common event records, likely distilled and reformatted from native logs • Is enterprise-level security sufficient §And also pluggable modules for harvesting records by tools §Tools §And also a trust fabric that permits multiple levels of authentication and fine-grain authorization CHANGE DATE 24

Federated Security-aware Capabilities § Federated user network authentication for on-the-road science § Control spam through federated verification of sending enterprises § Tell me which firewall is dropping which service request § Permit end-end videoconferencing through firewalls and NATs § Allow enterprise-specific patching paradigms to coexist § Create end-end transparency for use of Grids § Personal firewall configuration based on authorization CHANGE DATE 25

Moving it into the broader Internet §Picking approaches that are deployable and build on embedded bases §Federated substrata among those on common backbones §Interfederation issues – how hard will they be §International discrepancies in privacy §International Id. SP’s - legalisms CHANGE DATE 26

Advancing Network Security § An architecture instead of piece parts • Too many parts with too much interactions • Diagnostic hell and innovation ice age • Current approaches are doomed anyway… § Federated services and possible market making • Inter-institutional authn/z activities • Perhaps, with funding and trust, other federated security tools and services CHANGE DATE 27