Tunnelling of an IP subnet or virtual Ethernet adaptor over a single communication port means that the program is very firewall friendly, overcoming one of the problems that makes many VPN tools difficult to configure. OpenVPN is a comprehensive VPN tool which perfects the balance between ease of use and security which can be used to enable remote access on any scale and allow for communication between different networks.

Control OpenVPN using a GUI on Windows or Mac OS X.Anyone who has attempted to set up a virtual private network will be aware that it can be fraught with problems.

Create secure ethernet bridges using virtual tap devices.

Tunnel networks through connection-oriented stateful firewalls without having to use explicit firewall rules.

Tunnel networks whose public endpoints are dynamic such as DHCP or dial-in clients.

Use real-time adaptive link compression and traffic-shaping to manage link bandwidth utilization.

Use static, pre-shared keys or TLS-based dynamic key exchange.

Choose between static-key based conventional encryption or certificate-based public-key encryption.

Use any cipher, key size, or HMAC digest (for datagram integrity checking) supported by the OpenSSL library.

Use all of the encryption, authentication, and certification features of the OpenSSL library to protect your private network traffic as it transits the internet.

Configure a scalable, load-balanced VPN server farm using one or more machines that can handle thousands of dynamic connections from incoming VPN clients.

Tunnel any IP subnetwork or virtual ethernet adapter over a single UDP or TCP port.

This utility is not a web application proxy and does not operate through a web browser. OpenVPN implements OSI layer 2 or 3 secure network extensions using the industry-standard SSL/TLS protocol, supports flexible client authentication methods based on certificates, smart cards, and/or 2-factor authentication, and allows users group-specific access control policies using firewall rules applied to the VPN virtual interface.

These include remote access, site-to-site VPNs, WiFi security, and enterprise-scale remote access solutions with load balancing.

Pritunl available for profile management. OpenVPN is designed to be a full-featured SSL VPN solution that can accommodate a wide range of configurations.

For android instal OpenVPN Client 2.6.5