^ "Hamachi: The virtual private networking system". ![]() ^ a b US20070157303A1, Pankratov, Alexandre, "Server-mediated setup and maintenance of peer-to-peer client computer communications", issued.Virtual Private LAN Service, as defined in RFC 47.UDP hole punching, another NAT traversal technique.Session Traversal Utilities for NAT (STUN), as defined in RFC 8489.Private network, as defined in RFC 1918.Network address translation (NAT), as defined in RFC 3022.This makes it possible to use LAN protocols that rely on IP broadcasts for discovery and announcement services over Hamachi networks. Hamachi creates a single broadcast domain between all clients. As long as the client retains its key, it can log into the system and use this IP address. The IP address assigned to the Hamachi client is henceforth associated with the client's public crypto key. To avoid conflicting with existing private networks on the client side the normal private IP address blocks 10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/16 are not used. Addressing Įach Hamachi client is normally assigned an IP address when it logs into the system for the first time. Hamachi is frequently used for gaming and remote administration. When establishing tunnels between the peers, Hamachi uses a server-assisted NAT traversal technique, similar to UDP hole punching. When a member of a network goes online or offline, the server instructs other network peers to either establish or tear down tunnels to the former. The synchronization step brings a client's view of its private networks in sync with other members of these networks. The discovery is used to determine the topology of the client's Internet connection, specifically to detect the presence of NAT and firewall devices on its route to the Internet. The login step authenticates the client to the server and vice versa. When the connection is established, the client goes through a login sequence, followed by the discovery process and state synchronization. The Windows version also recognizes and tunnels IPX traffic.Įach client establishes and maintains a controlĬonnection to the server cluster. ![]() Hamachi currently handles tunneling of IP traffic including broadcasts and multicast. Outbound traffic sent by the operating system to this interface is delivered to the client software, which encrypts and authenticates it and then sends it to the destination VPN peer over a specially initiated UDP connection. Hamachi is a proprietary centrally-managed VPN system, consisting of the server cluster managed by the vendor of the system and the client software, which is installed on end-user devices.Ĭlient software adds a virtual network interface to a computer, and it is used for intercepting outbound as well as injecting inbound VPN traffic. It is currently available as a production version for Microsoft Windows and macOS, as a beta version for Linux, and as a system-VPN-based client compatible with Android and iOS. Hamachi became a LogMeIn product after the acquisition of Applied Networking Inc. Like other VPNs, it establishes a connection over the Internet that emulates the connection that would exist if the computers were connected over a local area network (LAN). It is capable of establishing direct links between computers that are behind network address translation (NAT) firewalls without requiring reconfiguration (when the user's PC can be accessed directly without relays from the Internet/WAN side). LogMeIn Hamachi is a virtual private network (VPN) application developed and released in 2004 by Alex Pankratov. Proprietary (Free of charge for up to 5 devices) ![]() Microsoft Windows (XP or later), macOS, Linux, Linux on ARM (beta)
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