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root@opentodo#

openvpn is a vpn solution that implements connections for the layer 2 or 3, using the SSL/TLS protocol stack. Configuring a vpn SSL/TLS is a good idea and enhance the security of our communications due to the data cipher using the pki infraestructure (pair public/private key) and the verification and authentication of the data. Some advantages of the use openvpn are:

  • Not necessary a static ip address for the server.
  • The virtual interfaces used by the vpn may be filtered by iptables.
  • Easy configuration.
  • No problems with NAT, the server and the client may be in a LAN with a router using NAT.
  • A single port used for the connectivity with the server, by default use 1194/udp.

Basically we can configure openvpn of two ways:

  • tun (layer 3): simulate a point to point connection using IP protocol.
  • tap (layer 2): simulate a virtual ethernet adapter. This method may encapsulate other…

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This entry was posted on January 19, 2013 by in Uncategorized.
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