Linux VPN Server

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For IPSec VPN, the user access control is realized by examining five network parameters (source IP, source port, protocol, destination IP, destination port). Due to these obvious advantages mentioned above, SSL VPN is being adopted by more and more individuals and companies. However, this does not mean that SSL VPN is the suitable solution for every case. Because SSL VPN was originally designed for web-based applications, it may not be a good solution for network services like FTP and Telnet, though some vendors have developed new functions to solve this problem. Thanks to the simple plug-ins like Firesheep, even a school going kid can hack your connection and take away whatever you are trying to access on hotspot connection. What can we do to protect ourselves on Public Wi-Fi The answer to this is also VPN. The growth in businesses worldwide has triggered a trend of dispersed workforces. Now more employees than ever work remotely while connecting to centralized servers in head offices and regional offices, thus having a regular flow of information between their system and centralized servers. This unsecured flow of information does not only risk the privacy and security of the flowing information but it risks the information stored on centralized servers and your system, thus making the entire data vulnerable to hacks. Therefore in order to have secure remote access to the centralized servers, the best solution is Dedicated - Static IP VPN which not only encrypts the flowing information, but also builds a secure tunnel for the information to flow while restricting the remote access to server through those dedicated IPs only. The RADIUS server will authenticate each dial connection as an authorized telecommuter. Once that is finished, the remote user will authenticate and authorize with Windows, Solaris or a Mainframe server before starting any applications. There are dual VPN concentrators that will be configured for fail over with virtual routing redundancy protocol (VRRP) should one of them be unavailable. Each concentrator is connected between the external router and the firewall. A new feature with the VPN concentrators prevent denial of service (DOS) attacks from outside hackers that could affect network availability. The firewalls are configured to permit source and destination IP addresses, which are assigned to each telecommuter from a pre-defined range. Virtual Private Network or VPN basically adds a layer of security to your internet connection hence making the flow of information more secure and private. More technically, VPN encrypts your information before it leaves your system and to the point it reaches your requested destination. With the exponential growth and availability of the internet, the need of the security and privacy of the internet is also at all high. Netizens now require tools to hide their identity and information from hackers and trackers who are after it and in order to do so, we tend to go for security and privacy tools. One of the best tools to secure your online identity and flow of information is VPN. With the immense growth in the availability of the internet on public Wi-Fi's in Cafes, Streets and Universities, our information is at all time high risk. Most Linux based VPN servers come with many options and a very thick instruction manual.

Your VPN Doctor for Virtual Private Network Troubleshooting VPN Guide

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These kind of specific hassles are completely eliminated by the use of dedicated VPN or Virtual Private Networks. As well, any application and protocol ports will be permitted through the firewall that is required. Extranet VPN Design - The Extranet VPN is designed to allow secure connectivity from each business partner office to the company core office. Security is the primary focus since the Internet will be utilized for transporting all data traffic from each business partner. There will be a circuit connection from each business partner that will terminate at a VPN router at the company core office. Each business partner and its peer VPN router at the core office will utilize a router with a VPN module. That module provides IPSec and high-speed hardware encryption of packets before they are transported across the Internet. A VPN (Virtual Private Network) connects a PC or laptop over the Internet to the office network allowing the remote user to work as if they were sitting at their desk in the office. Normally, setting up a VPN requires significant technical skills as the office firewall needs to be reconfigured, the VPN server has to be setup and the whole lot has to be made secure. Once setup and working, the VPN server needs to be monitored (to ensure there is nothing suspicious going on) and maintained with the latest security patches provided by the VPN vendor. A VPN service gives all the features of a VPN server but removes the complexity and cost of setup, monitoring and maintenance. To setup a VPN provided as a service, you need to visit the providers website, register online and download a piece of software to a system in the office network. This software connects the office network to the VPN Service via the Internet without having to change your firewall. IPSec is specified with RFC 2401 and developed as an open standard for secure transport of IP across the public Internet. The packet structure is comprised of an IP header - IPSec header - Encapsulating Security Payload. In addition there is Internet Key Exchange (IKE) and ISAKMP, which automate the distribution of secret keys between IPSec peer devices (concentrators and routers). Those protocols are required for negotiating one-way or two-way security associations. IPSec security associations are comprised of an encryption algorithm (3DES), hash algorithm (MD5) and an authentication method (MD5). Access VPN implementations utilize 3 security associations (SA) per connection (transmit, receive and IKE). Second, VPN is nearly impossible to tap or interfere data in the VPN tunnel. And lastly, a VPN client software can connect you to your company from anywhere around the globe. It also reduce operational costs, transit times and travelling costs for remote users. Android VPN's aren't just for mobile phones - The Android OS powers more than just mobile phones. An Android VPN will give you an extra layer of security to get things done without worrying about revealing personal information. A VPN is a private computer network that is based in an overlay on top of an existing network and uses a public network such as the internet to create a private, secure communication scope or to connect remote sites or users together. It serves many purpose such as providing secure extension of a private network into internet (which is usually insecure and prone to attack), using a virtual connection instead of a real connection such as a leased line.

Factors Affecting a Fast VPN

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Once setup and working, the VPN server needs to be monitored (to ensure there is nothing suspicious going on) and maintained with the latest security patches provided by the VPN vendor. A VPN service gives all the features of a VPN server but removes the complexity and cost of setup, monitoring and maintenance. To setup a VPN provided as a service, you need to visit the providers website, register online and download a piece of software to a system in the office network. This software connects the office network to the VPN Service via the Internet without having to change your firewall. IPSec is specified with RFC 2401 and developed as an open standard for secure transport of IP across the public Internet. The packet structure is comprised of an IP header - IPSec header - Encapsulating Security Payload. In addition there is Internet Key Exchange (IKE) and ISAKMP, which automate the distribution of secret keys between IPSec peer devices (concentrators and routers). Those protocols are required for negotiating one-way or two-way security associations. IPSec security associations are comprised of an encryption algorithm (3DES), hash algorithm (MD5) and an authentication method (MD5). Access VPN implementations utilize 3 security associations (SA) per connection (transmit, receive and IKE). Second, VPN is nearly impossible to tap or interfere data in the VPN tunnel. And lastly, a VPN client software can connect you to your company from anywhere around the globe. It also reduce operational costs, transit times and travelling costs for remote users. Global networking opportunities, telecommuter support and faster Return On Investment are provided as well, other than the use of traditional internet. Android VPN's aren't just for mobile phones - The Android OS powers more than just mobile phones. An Android VPN will give you an extra layer of security to get things done without worrying about revealing personal information. A VPN is a private computer network that is based in an overlay on top of an existing network and uses a public network such as the internet to create a private, secure communication scope or to connect remote sites or users together. It serves many purpose such as providing secure extension of a private network into internet (which is usually insecure and prone to attack), using a virtual connection instead of a real connection such as a leased line. For instance, we need software for each remote user, a dedicated hardware (concentrator), a VPN server to be used by the service provider, secure PIX firewall etc. Coming on to the advantages of a VPN or the ways in which it can benefit a business to succeed, VPN are a cost effective medium (which saves the company a large sum), they are mobile and provide security to its users (which increases client's trust in the company), it provides a vast geographical connectivity which enables the employees to log in at places comfortable to them (thereby increasing connectivity), they also offer broadband networking, telecommuter support etc. For compatibility reasons most Cisco networks use Cisco VPN software, but never the less irrespective of whichever VPN client used, an SSL (Secure Sockets Layer) should be set up for maximum efficiency and should contain proper security measures to avoid hacking of personal data of the client. Priority should be given to striking the right balance between proper functionality and smooth usage (for yourself and the end users who will be accessing the network).