LogMeIn Hamachi
{{Short description|Virtual private network application}}
{{Primary sources|date=May 2013}}
{{Infobox software
| name = LogMeIn Hamachi
| logo =
| screenshot = Hamachi (software) interface screenshot.jpg
| screenshot size = 230px
| caption = Screenshot of the Hamachi Client, showing a joined network and other users who are participating
| author = Alex Pankratov
| developer = LogMeIn Inc.
| released = 2004{{Cite patent|number=US20070157303A1|title=Server-mediated setup and maintenance of peer-to-peer client computer communications|gdate=2007-07-05|invent1=Pankratov|inventor1-first=Alexandre|url=https://patents.google.com/patent/US20070157303A1/en}}{{cite web |url=https://swapped.cc/#!/hamachi|title=Hamachi: The virtual private networking system|work=Personal website of Alex Pankratov|access-date=2019-01-16}}
| latest_release_version = 2.3.0.111 (Windows)[https://support.logmeininc.com/hamachi/help/whats-new-in-hamachi "What's new in Hamachi"]
| latest_release_date = {{start date and age|2024|04|18}}
| operating_system = Microsoft Windows (XP or later), macOS, Linux, Linux on ARM (beta)
| license = Proprietary (Free of charge for up to 5 devices)
| website = [https://www.vpn.net www.vpn.net]
}}
LogMeIn Hamachi is a virtual private network (VPN) application developed and released in 2004 by Alex Pankratov.{{Cite patent|number=US20070157303A1|title=Server-mediated setup and maintenance of peer-to-peer client computer communications|gdate=2007-07-05|invent1=Pankratov|inventor1-first=Alexandre|url=https://patents.google.com/patent/US20070157303A1/en}}{{cite web |url=https://swapped.cc/#!/hamachi|title=Hamachi: The virtual private networking system|work=Personal website of Alex Pankratov|access-date=2019-01-16}} 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). Like other layer 2 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).
Hamachi became a LogMeIn product after the acquisition of Applied Networking Inc. in 2006.{{Cite web |date=January 11, 2008 |title=REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 LOGMEIN, INC. |url=https://www.sec.gov/Archives/edgar/data/1420302/000095013508000171/b67378lmsv1.htm |access-date=2023-04-09 |website=www.sec.gov |quote=On July 26, 2006, the Company purchased substantially all of the assets of Applied Networking, a Canadian corporation, in order to expand the Company’s product and service offerings and customer base. In connection with the acquisition, the Company acquired the patented Hamachi technology, a virtual private networking service.}}{{Cite web |title=Hamachi : Stay Connected |url=https://web.archive.org/web/20060828184025if_/http://hamachi.cc/ |access-date=2023-04-09}}{{Cite web |date=October 31, 2006 |title=LogMeIn Launches Instant, Zero Configuration VPN |url=http://corp.logmein.com/pdf/LMIPR_LMI_Hamachi.pdf |access-date=2023-04-09 |archive-url=https://web.archive.org/web/20061101194256/http://corp.logmein.com/pdf/LMIPR_LMI_Hamachi.pdf |archive-date=2006-11-01}} 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.{{Cite web |title=Hamachi System Requirements - Hamachi Support |url=https://support.logmeininc.com/hamachi/help/hamachi-system-requirements-hamachi-c-hamachi-systemrequirements |access-date=2023-04-09 |website=support.logmeininc.com |language=en}}
Operational summary
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.
Client software adds a virtual network interface to a computer, and it is used for intercepting outbound as well as injecting inbound VPN traffic. 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 currently handles tunneling of IP traffic including broadcasts and multicast. The Windows version also recognizes and tunnels IPX traffic.
Each client establishes and maintains a control
connection to the server cluster. When the connection is established, the client goes through a login sequence, followed by the discovery process and state synchronization. The login step authenticates the client to the server and vice versa. 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 synchronization step brings a client's view of its private networks in sync with other members of these networks.
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. When establishing tunnels between the peers, Hamachi uses a server-assisted NAT traversal technique, similar to UDP hole punching.
Hamachi is frequently used for gaming and remote administration.{{Citation needed|date=February 2024}}
Addressing
Each Hamachi client is normally assigned an IP address when it logs into the system for the first time. 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.
The IP address assigned to the Hamachi client is henceforth associated with the client's public crypto key. As long as the client retains its key, it can log into the system and use this IP address. Hamachi creates a single broadcast domain between all clients. This makes it possible to use LAN protocols that rely on IP broadcasts for discovery and announcement services over Hamachi networks.
See also
- Network address translation (NAT), as defined in {{IETF RFC|3022}}
- Pertino
- Private network, as defined in {{IETF RFC|1918}}
- Session Traversal Utilities for NAT (STUN), as defined in {{IETF RFC|8489}}
- UDP hole punching, another NAT traversal technique
- Virtual Private LAN Service, as defined in {{IETF RFC|leadout=and|4761|4762}}
- XLink Kai
References
{{reflist}}
External links
- {{official website|https://www.vpn.net}}
{{VPN}}
{{DEFAULTSORT:Hamachi (Software)}}
Category:Internet Protocol based network software
Category:Internet software for Linux
Category:MacOS Internet software