Es gibt eine coole kostenlose VPN Server Software „SoftEther VPN“.
Das Produkt besteht aus mehreren Modulen (Server, Client, Bridge) und steht für Windows (einschließlich ARM-Rechner), Linux und MacOS oder Android / iPAD zur Verfügung.
Die Lösung ist von der japanischen Universität von Tsukuba gebaut und deckt mehrere Anwendungsfälle ab und hat einige integrierte Dienstprogramme für dynamisches DNS (keine Notwendigkeit für externe IP´s)
Das Produkt ermöglicht einen Remote-Zugriff auf Ihr Labor / Unternehmen / Ort oder eine Website-to-Site VPN. Es benutzt SSL-VPN-Tunneling auf Https, um sich durch die NAT und Firewall zu verbinden.

Die Architektur ist einfach. Die Software kann Ethernet-Geräte virtualisieren, so dass es ein flexibles VPN-Netzwerk für den Remote-Zugriff VPN oder für Site-to-Site VPN erstellen kann. SoftEther VPN implementiert das Virtual Ethernet Switch Programm (Virtual Hub) als Software-emulierter traditioneller Ethernet Switch. SoftEther VPN implementiert VPN Session als Software-emuliertes Ethernet-Kabel zwischen Netzwerkadapter und Switch.
Das SoftEther VPN Protokoll basiert auf HTTPS so fast alle Arten von Firewalls erlaubt SoftEther VPN’s Pakete. Ähnlich wie Skype Software.

Features of SoftEther VPN

 

Architecture of SoftEther VPN

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Virtualization of Ethernet devices is the key of the SoftEther VPN architecture. SoftEther VPN virtualizes Ethernet devices in order to realize a flexible virtual private network for both remote-access VPN and site-to-site VPN. SoftEther VPN implements the Virtual Network Adapter program as a software-emulated traditional Ethernet network adapter. SoftEther VPN implements the Virtual Ethernet Switch program (called Virtual Hub) as a software-emulated traditional Ethernet switch. SoftEther VPN implements VPN Session as a software-emulated Ethernet cable between the network adapter and the switch.

You can create one or many Virtual Hub with SoftEther VPN on your server computer. This server computer will become a VPN server, which accepts VPN connection requests from VPN client computers.

You can create one or many Virtual Network Adapter with SoftEther VPN on your client computer. This client computer will become a VPN client, which establishes a VPN connections to the Virtual Hub on the VPN server.

You can establish VPN sessions, as called ‚VPN tunnels‘, between VPN clients and VPN servers. A VPN session is the virtualized network cable. A VPN session is realized over a TCP/IP connection. The signals through the VPN session is encrypted by SSL. Therefore, you can safely establish a VPN session beyond the Internet. A VPN session is established by SoftEther VPN’s „VPN over HTTPS“ technology. It means that SoftEther VPN can create a VPN connection beyond any kinds of firewalls and NATs.

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The Virtual Hub exchanges all Ethernet packets from each connected VPN session to other connected sessions. The behavior is same to traditional Ethernet switches. The Virtual Hub has a FDB (forwarding database) to optimize the transmission of Ethernet frames.

You can define a local bridge between the Virtual Hub and the existing physical Ethernet segment by using the Local Bridge function. The Local Bridge exchanges packets between the physical Ethernet adapter and the Virtual Hub. You can realize a remote-access VPN from home or mobile to the company network by using the Local Bridge function.

You can define a cascading connection between two or more remote Virtual Hubs. With cascading, you can integrate two or more remote Ethernet segments to a single Ethernet segment. For example, after you establish cascading connections between the site A, B and C, then any computers in the site A will be able to communicate with the computers in the site B and the site C. This is a site-to-site VPN.

SoftEther VPN can also establish a VPN session over UDP. The UDP-mode of SoftEther VPN supports NAT traversal. The NAT traversal function allows the VPN server behind existing NATs or firewalls to accept incoming VPN sessions. You need no network administrator’s special permission before setting up a VPN server on the company network behind firewalls or NATs. Additionally, SoftEther VPN Server may be placed on the dynamic IP address environment since SoftEther VPN has built-in Dynamic DNS (DDNS) function.

SoftEther VPN Server supports additional VPN protocols, including L2TP/IPsec, OpenVPN, Microsoft SSTP, L2TPv3 and EtherIP. These realizes the interoperability with built-in L2TP/IPsec VPN clients on iPhone, iPad, Android, Windows and Mac OS X, and also with Cisco’s VPN routers and other vendors VPN products.

 

OpenVPN vs. SoftEther VPN

Popular Question: What is the advantage of SoftEther VPN to OpenVPN?

Obviously, OpenVPN is an excellent tool. However, the development of OpenVPN has been stalled for many years. And as you know OpenVPN has no significant improvement in recent years.

The following table will show that the more benefit that SoftEther VPN can provied you. SoftEther VPN supports multi VPN protocols and multi native-VPN clients of various operating systems. SoftEther VPN has an easy-to-use VPN server management GUI tool. SoftEther VPN has also multi-language support. There are any other advantages in SoftEther VPN. Furthermore, SoftEther VPN has the OpenVPN-clone server function. It means that any OpenVPN users can replace it to SoftEther VPN seamlessly.

The SoftEther VPN Project believes that SoftEther VPN has the potential ability to occupy the even stronger position in today’s OpenVPN.

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How to Use SoftEther VPN ?

 

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SoftEther VPN is an essential infrastructure to build-up IT systems on enterprises and small-businesses.