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Secure Real-Time Audio/Video Communication Tutorial

This tutorial explores H.350, encryption, gatekeeper/proxy use with H.323 (and SIP), ViDeNet, Global Dialing Scheme, and number plans. Presented at the 19th APAN Meeting in Bangkok, Thailand in January 2005.

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Secure Real-Time Audio/Video Communication Tutorial

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  1. Secure real-time audio/video communication – H.350, Encryption & Gatekeeper/Proxy – using H.323 (…and a bit SIP) Tutorial/workshop session - ViDeNet, Global Dialling Scheme, Numberplans - 19th APAN Meeting Bangkok, Thailand January 2005

  2. Int.l. virtual network, providing video tele-conferencing, telephone and collaboration services over Internet, Internet2 and related advanced networks. • Created in 1998 with Internet2 sites experimenting with h.323 • World’s largest voice and video over IP ‘internet’ • Production quality test bed • Features • Incubation engine for new technologies • Dialing directory, web-based registration • Dial Plan (GDS) • Public Zone resources • Community of experts sharing information

  3. 2001

  4. 2002

  5. 2003

  6. 2004

  7. Higher education VC services • European research networks • operational: DFN (Germany), UKERNA (UK), SWITCH (Switzerland), HEAnet (Ireland), SURFnet (Netherlands), Funet (Finland), Uninett (Norway), RedIris (Spain), CARnet (Croatia), GARR/Cineca (Italy), GRnet (Greece), UNI-C (Denmark), FCCN (Portugal), CESnet (Czech Rep.), Arnes (Slovenia), LITnet (Lithuania), PSCN (Poland), XXX (Iceland), HUNGARnet (Hungary) • North America • ViDeNet, Internet2 Commons, Oarnet, Onenet, … • CANARIE (Canada) • CUDI (Mexico) • Asian-Pacific research networks • AARNet (Australia), New Zealand • Plans for all APAN exchange points (Japan, China, Malysia, Thailand,…) • South America/Africa • Known sites (Egypt, South Africa; Brasil, Chile) Nov 2004

  8. ViDeNet Zones • International • Universities • Educational institutes • Research institutes • Research and Educational Networks • Companies • Public Zone 125+ Zones ! 10000+ endpoints And counting

  9. Global Dialing Scheme • Principles • International, but freedom of choice for local situation • E.164/tel.no. integration • Implemented by present gatekeeper technology • Compatible with existing network (ViDeNet) • Governed by ViDe’s Numerical Address Space Management (NASM) working group • Proposal • by SURFnet, UKERNA, HEAnet, UNC • Implemented by ViDeNet, Internet2 and NREN-services and testbeds

  10. GDS • Numeric[<EZ>] <world gk> <cc.> <org. > <clientno>[<suf>]00 ITU cc uniqueID local no.00 31 302305 367 • Alphanumeric<userID>@<fully qualified domain name>egon.verharen@surfnet.nl

  11. 541 GDS

  12. Numerical Address Space Management (NASM) • Core Dial Plan Management for ViDeNet • Manage Root Gatekeeper Hierarchy • ViDeNet admissions • Root ViDeNet tool administration

  13. ViDeNet Hierarchy

  14. Tools • New directory • Based on ITU standard H.350 • Number of web-based management tools that allow • zone administrators to manage their users and zone • users to manage their directory information and endpoints • Search • https://videnet.unc.edu (user directory and zone mgt) • https://videnet.unc.edu/vide-dod/ (search tool)

  15. Detailed tool description • 1. Any user can put themself in the directory and manage their own information. They can give their endpoints friendly names. • 2. Zone administrators can create as many zones as they need for themselves. • 3. Zone administrators can use the ViDeNet tool to manage: • a. custom web portal for their zone (demo UNC zone for fun) • b. scratch pad for important info • c. routing (i.e. peering into GDS) • d. research other zones and zone admins • e. listserv for sharing information • f. add commObject data (i.e. h.323 address) to users. • g. review/approve/delete user requests • 4. Users may search the commObject directory. • 5. Not distributed yet, coming soon. • 6. Once the code stabilizes, we will distribute the tool.

  16. IMTCUNMAP

  17. ENUM • Resolve PSTN numbers (E.164) to IP • +31 30 2305109 will go first to SIP phone, then to H.323 phone and e-mail otherwise $ORIGIN 7.6.3.5.0.3.2.0.3.1.3.e164.arpa IN NAPTR 10 100 "u" "E2U+sip" "!^.*$!sip:egon.verharen@surfnet.nl!" . IN NAPTR 10 101 "u" "E2U+h323" "!^.*$!h323:egon.verharen@surfnet.nl!" . IN NAPTR 10 102 "u" "E2U+msg:mailto" "!^.*$!mailto:egon.verharen@surfnet.nl!“.

  18. Dialplan • Keep it simple: identify users by e-mailadres • To support easy in/outside dialing: make number aliases: ‘real’ telephone number, consisting of: • short number • Prefix (+31302305)367 = egon.verharen@surfnet.nl • Process numbers: add/strip prefix

  19. References • ViDeNet https://videnet.unc.edu/ • GDS/Numberplan http://www.wvn.ac.uk/support/h323address.htm http://www.surfnet.nl/innovatie/surfworks/conferencing/numberplan/ • NASM http://www.vide.net/workgroups/nasm/index.shtmlvisit the ‘Resource’ section too ! • UNMAP (multimedia dialplan)http://www.imtc.org/activity_groups/ummap.asp • Internet2 Commons http://commons.internet2.edu/ • Megaconference http://www.mega-net.net/megaconference/

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