Best App Ssl Vpn – One of the main features of a VPN is its transparency through firewalls, proxy servers and NAT (Network Address Translators). NAT is sometimes implemented in broadband router products.
Generally, in today’s corporate networks, there are firewalls to separate internal and external networks to ensure security. Beyond security purposes, companies use firewalls, proxies and NATs to share important IP addresses between multiple office computer users. Therefore, such devices are indispensable today.
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Traditional VPN protocol tunnels such as IPsec, L2TP and PPTP often cannot be established through firewalls, proxy servers and NAT. These protocols were developed at a time before NAT became widespread. For example, IPsec and L2TP use Encapsulating Security Payload (ESP) packets, and PPTP uses Generic Routing Encapsulation (GRE) packets. These packets are specially formatted IP packets. Therefore, firewalls, proxies, and NATs usually cannot pass these older VPN packets. Recently, some vendors of VPN products with IPsec, L2TP and PPTP have tried to invent extensions to get through these wall devices, and some VPN products use the extensions. However, such older VPN protocol extensions still have compatibility issues. Users often try to establish VPN connections over either L2TP or PPTP on networks with firewalls, proxy servers, and NAT, but fail. You may have stayed in a hotel room and tried to connect to your corporate network using a remote VPN access with either L2TP or PPTP but failed. The reason it fails is that firewalls, proxy servers and NATs on the network are not compatible with L2TP or PPTP.
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Therefore, network administrators today are plagued by incompatibility between VPN connections and security devices.
The VPN uses the HTTPS protocol to establish the VPN tunnel. The HTTPS (HTTP over SSL) protocol uses TCP/IP port 443 as a destination. This port is known and almost all firewalls, proxy servers and NATs can send packets configured with the HTTPS protocol.
The HTTPS protocol is widely used on the Internet. When you open a browser and visit a website with secure communication, it automatically uses HTTPS. Thanks to HTTPS, sensitive information such as credit card numbers can be sent over the Internet. Today’s social activities rely on HTTPS. Without HTTPS, we cannot use the Internet as a tool for e-commerce.
Since HTTPS is the de-facto standard, almost all firewalls, proxy servers and NATs open paths for HTTPS. Anyone within your Local Area Network (LAN) can remotely establish an arbitrary HTTPS connection between your host and any host on the Internet. Exploiting this condition is the best way to achieve great transparency in the VPN protocol.
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Therefore, VPN uses HTTPS as protocol for VPN stabilization and tunneling mechanism. VPNs can be used in almost any network environment, such as corporate LANs, hotel rooms, free Wi-Fi access at airports, and are different from other legacy VPNs such as IPsec, PPTP, and L2TP.
This VPN feature makes it easy to design your own VPN topology to suit your needs with minimal effort to modify existing network security devices. If you use a VPN on your network, there is less need to change your network’s current configuration and policies because of the VPN’s ability to connect correctly.
On the other hand, if your network uses an older VPN, you will need to modify existing network policies on security devices such as firewalls to allow special IP protocols such as ESP and GRE to pass through. The firewall configuration file must also be changed. Such work requires extra effort and can have a negative effect on a stable and important network. Not only is this difficult, but it also puts your network at risk because you have to change your firewall settings to keep your network from letting through traditional VPN packets. With a VPN, none of these efforts and risks are necessary.
Some networks, such as airport Wi-Fi and hotel room internet, restrict the use of VPNs other than HTTP and HTTPS for security reasons. In a very dense network, the only way to use a VPN is to use an HTTPS packet tunneling VPN as the VPN.
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A VPN is not just a VPN, it is a very good VPN in terms of compatibility with firewalls, proxies and NAT.
The VPN server is not the only VPN over the HTTPS protocol explained in section 1.1. VPN Server also supports L2TP/IPsec, OpenVPN, MS-SSTP, L2TPv3 and EtherIP protocols. These are standard protocols for Internet VPNs.
IPhones, iPads, Androids, Windows Mobiles and other mobile devices can now connect to VPN servers anytime, anywhere. Edge VPN products from Cisco Systems or other VPN router vendors that support L2TPv3/IPsec or EtherIP/IPsec can also be used to connect to VPN servers.
The following devices have a built-in L2TP/IPsec VPN client: You can connect to VPN servers without installing client software on such devices.
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The VPN server has an OpenVPN “clone” function. If you have already installed OpenVPN for remote access VPN or site-to-site VPN, you can replace your current OpenVPN server software with a VPN server software and enjoy the great features and high performance of VPN.
OpenVPN’s “close function” on VPN Server works the same way as OpenVPN Technologies, Inc.’s implementation, not only enough, but with better performance and features. An OpenVPN client device or VPN edge can be connected to a new VPN server very easily. VPNs can be used in both remote access L3 VPNs and site-to-site L2 VPNs.
VPN Server has a “clone function” of Microsoft SSTP VPN Server. You can connect to the VPN server from Windows 7 / 8 / RT using the built-in SSTP VPN client. SSTP (Secure Socket Tunneling Protocol) is a PPP over HTTPS protocol proposed by Microsoft.
Originally, the SSTP VPN Server feature was only implemented in Microsoft Windows Server 2008/2012. However, the license fees for these Microsoft server operating systems are very expensive. It is also difficult to configure for users with normal skills. By using Microsoft SSTP VPN Server Proximity Server, you can achieve almost equivalent functionality and performance with VPN Server.
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Cisco Systems router products and most other vendor products support the L2TPv3/IPsec or EtherIP/IPsec VPN protocol. These protocols are for creating a site-to-site L2 bridge VPN. VPN Server supports L2TPv3 and EtherIP over IPsec. Using a Cisco router as the edge and a VPN server as the center, you can build an L2 bridge connection between the sites. This has the advantage of reducing costs. Cisco hub routers are very expensive. VPN Server can easily replace advanced Cisco routers in the middle of VPN.
At the end of 2012, performance tests were conducted in the laboratory of the Graduate School of Information Science and Technology, University of Tsukuba.
Five protocols were tested: VPN, L2TP/IPsec, SSTP, OpenVPN (Layer 3 mode), OpenVPN (Layer 2 mode). To evaluate VPN performance, we tested our VPN server implementation and existing implementations by Microsoft Corporation or OpenVPN Technologies, Inc. The test environment is Windows Server 2008 R2 x64 on Intel Xeon E3-1230 3.2GHz and Intel 10 Gigabit CX4 Dual Port Server Adapter.
As a result, VPN Server is 103.5% faster than Microsoft’s Windows implementation for L2TP/IPsec, 103.0% faster than Microsoft’s Windows implementation for SSTP, and 108-117% faster than the original OpenVPN implementation. Additionally, our VPN protocol (Ethernet over HTTPS, described in section 1.1) resulted in 980 Mbps. It is 159.6% faster than L2TP/IPsec protocol, 175.2% faster than SSTP protocol and 9.8 times faster than OpenVPN protocol.
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Most existing VPN solutions require a fixed global IP address for stability. A fixed global IP address requires a monthly fee to be paid to your ISP. And the lack of global IP address is already a serious problem in our world.
VPNs have a built-in Dynamic DNS (DDNS) feature to mitigate the above issues. The Dynamic DNS feature is enabled by default. The DDNS function registers the IP address of your VPN server in the DNS record of the domain suffix “..net” managed by the University of Tsukuba Co., Ltd. Free.
A DDNS FQDN “abc..net” (where “abc” is a user-defined identifier) is assigned to the VPN server. You can tell VPN server users the DDNS hostname. VPN server users can now specify DDNS hostnames as destinations. In the future, if the corresponding IP address suddenly changes, the registered IP address of the DDNS hostname will follow the new IP. This mechanism eliminates the need for fixed global IP addresses and reduces costs.
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