ⓘ Kad network

                                     

ⓘ Kad network

The Kad network is a peer-to-peer network which implements the Kademlia P2P overlay protocol. The majority of users on the Kad Network are also connected to servers on the eDonkey network, and Kad Network clients typically query known nodes on the eDonkey network in order to find an initial node on the Kad network.

                                     

1. Usage

The Kad network uses a UDP-based protocol to:

  • Find comments and ratings for files hashes.
  • Search for eD2k hashes based on keywords in the file name.
  • Find sources for eD2k hashes.
  • Provide buddy services for firewalled Low ID nodes.
  • Store locations, comments and keywords out of filenames.

Note that the Kad network is not used to actually transfer files across the P2P network. Instead, when a file transfer is initiated, clients connect directly to each other using the standard public IP network. This traffic is susceptible to blocking/shaping/tracking by an ISP or any other opportunistic middle-man.

As with all decentralized networks, the Kad network requires no official or common servers. As such, it cannot be disabled by shutting down a given subset of key nodes. While the decentralization of the network prevents a simple shut-down, traffic analysis and deep packet inspection will more readily identify the traffic as P2P due to the high variable-destination packet throughput. The large packet volume typically causes a reduction in available CPU and/or network resources usually associated with P2P traffic.

                                     

2. Clients

Client Search

The Kad network supports searching of files by name and a number of secondary characteristics such as size, extension, bit-rate, and more. Features vary based on client used.

Malware/Virus

  • TDL-4: A botnet virus that is reported to use this network as a backup for updates and new instructions if its Command and Control servers are taken down.
                                     

2.1. Clients Client Search

The Kad network supports searching of files by name and a number of secondary characteristics such as size, extension, bit-rate, and more. Features vary based on client used.

                                     

2.2. Clients Malware/Virus

  • TDL-4: A botnet virus that is reported to use this network as a backup for updates and new instructions if its Command and Control servers are taken down.