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supernode



p2p experts map SkypeNet's Supernodes

Phil Wolff on December 8, 2005 12:58 PM

Thumbnail of world map of Skype supernodesCoobol, the new p2p R&D firm, mapped Skype supernodes earlier this week. (Full size image, 1.1MB) A Coobol spokesman explained it like this:

A Skype supernode is a dynamic peer-to-peer server in SkypeNet. A supernode is one of Skype’s users. Powered by these unknown supernodes or users across the world, Skype is able to provide the super world telephony communication system for free. However, this is not something new. As we all know, this is just the basic theory of peer-to-peer technology. Inspired by p2p mechanism, Coobol will provide our partners with software, solutions and Internet platforms for them to build a variety of applications, such as P2P network security, content publication, streaming media, global VOIP network, virtual office, SNS (Social Network Service) etc. We are determined to be a world-class peer-to-peer research and development company.
20051207europe300x184.jpg

Coobol is a peer-to-peer technology specialist. They focus on the research and development of software, network communication platforms and tools based on peer-to-peer technology. They "bring ordinary people together to create miracles." The name Coobol was created initially by team members during a tea party. Their office is in Hong Kong.

There are many things we don't know about Skypenet, that I would hope technical R&D firms like Coobol might be paid to investigate. For instance,

  • What is the frequency distribution of Skype supernode lifespans?
  • Why are Chinese Skype supernodes not shown on the map? Where else are these factors at play?
  • How does the number of supernodes vary by time, for example by time of day and day of week?
  • How many supernodes are being operated by Skype itself instead of its users?
  • How many supernodes would an attacker have to disable to cause the remaining supernodes to overload? 20051207northam300x127.jpg
  • What is the range of Skype users supported by supernodes? Does this vary a great deal?
  • Any way to tell how many supernodes are being run over dial-up connections?
  • Do all the regions have similar ratios of nodes to supernodes? Or do they vary?
  • Are the number of supernodes keeping up with the number of active Skype users? With the the number of minutes served?
  • If you can identify Skype supernode IP addresses, can you measure the amount of cloud traffic a supernode passes along? The amount of chat/voice/video/data relay bandwidth?

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Thursday night roundup

Phil Wolff on October 20, 2005 02:36 PM

Ebay

First off, Ebay finished buying Skype last week. Skype Technologies, S.A., is still a stand alone company, but Ebay owns all the stock. Just over a month from the announcement; speedy, neh?

Steve Dzemidzenka tips us to an ISP-Planet interview with a company that offers pay-per-call advertising on Ebay (vs. pay-per-click); a great read and with one or two insights into models Skype may enable. A related AP story: Online ads urge surfers to pick up the telephone.

Some folks don't like Skype

Skype is still banned on university campuses in France. (Thanks, Alain.) Verso is still selling a filter to block Skype traffic. (Thanks, Mr. Harvey.) Qatar is still blocking Skype software downloads and Skype purchases. (Thanks, Jeff) Can you suggest a reliable way to tell if my Skype traffic is blocked?

From the Skype Ecology

Ipevo launched a family of Skype Certified phones last week, shortly after Linksys and Skype announced a co-branded Skype-only mobile handset and base station. While Skype says the Linksys is certified (via SparkPR), you wouldn't know it by reading the Linksys product literature, the Skype news release, or the product page on Amazon. Everyone else pays dearly for the Skype Certification and brags about it mercilessly; why not Linksys?

Look2Skype, the Outlook plug-in, is upgraded.

Maintaining the key benefit of Look2Skype which is the minimal inteference with Outlook, whereby it doesn't cause it to crash, or slow it down. Some of the new features are:
  1. Instant access to all skype contacts from Outlook.
  2. Extract callto:// signatures from e-mail.
  3. Auto-recognise of skype contacts from e-mails.
  4. Free text entry of phone numbers or skype names for contacting. Stewart Bissett

Recovery 2.0

This disaster is in a war zone.
  • Families in Kashmir prevailed upon Indian authorities' better natures to open up cross-border phone service, normally carefully scheduled and monitored for security reasons.
  • Volunteers are setting up a QuakeHelp Relief Hotline using SMS. Skype was unable to help with a voice line this time (they helped in Katrina relief) because they don't have SkypeIn services in India. Good sources: QuakeHelp and the QuakeHelp blog.
  • Pakistan banned public access to satellite imagery of the disaster zone. Security. In a fight-or-flight, clench or relax, response, one or the other response is better. Restricting geo information breaks the decentralized operation of the Internet. You want to open up resources and remove obstacles for the many thousands of online volunteers who can put that data to work. Fortunately, relief workers voices persuaded the UN to re-publish much of the imagery and data. A win for emergent organization.
  • The term "Recovery 2.0" is a flexible set of online tools and behaviors that can help invidividuals and groups organize themselves around any crisis. I've proposed a few possible projects on the wiki (feel free to register and add your own):
    • Phone Bank Network; the telephone remains the dominant way people communicate. We need tools to deploy volunteer phone banks that scale rapidly and cheaply.
    • Emergent Relay Service; provide a framework for live interpretation for cross-language and cross-mode communications.
    • Wish I could take credit: Mesh-Networking Cellphones; Why aren't there ad-hoc battery-powered "cell towers in a barrel" that could be "bombed" or floated into disaster zones to turn the thousands of useless cell phones in people's pockets into a crisis mesh network?

Skype at Work

Enterprise Skype isn't even vaporware, but the need is real. For example:

I was wondering if there exists a Skype Proxy server for enterprise use? Essentially, all Skype traffic would flow through this edge device, but would also allow for Skype-to-Skype traffic to stay internal to an organization without having to contact SuperNodes. HTTPS Proxies don't really provide any control of Skype traffic since they blindly pass all traffic since it's so volitile.

Also, is there a product that will allow multiple Skype clients to connect to a PBX simultaneously? Thus, be able to make calls from a Skype client to any phone on the PBX. I've seen some hardware solutions, but they seem primitive and only allow 1:1 communication. I'm looking for large scale many:many.

Thanks, Joe Schwendt

Another case:

Hi guys, I run a 450 person company's IT department. Yesterday Verizon had a man-hole fire and cut our lines completely, so we were phone-less for the whole day. We're a financial services company so you can imagine how freaked out everyone was.

What I was thinking last night is, what if Skype had a great enterprise version, that we could purchase 50 accounts for, and get them set up, distribute mics to our top 50 offices and have a back-up plan immediately in effect

Help Wanted:

We're always glad to post job listings of interest to the Skype Journal community.
Hi. We are currently looking for an Asterisk developer who has experience in integrating Skype to an Asterisk-powered IVR.

Skype me and I'll pass along your interest.

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p2p experts map SkypeNet's Supernodes

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