A virtual private network (VPN) provides a private network for communication across a public network. The three broad categories of connection type are host-to-site, host-to-host and site-to-site, depending on the purpose of the connection and protocol used. A tunnelling protocol is used to establish the private network connection, and various stages of authentication may be required for access. Security can be provided by IPsec (Internet Protocol Security), which encapsulates an IP packet inside an IPsec packet, as well as SSL/TLS, Microsoft Point-to-Point Encryption (MPPE) and others.
A project for a mobile content provider: sending information via the networks of the major mobile operators; SMPP router for sharing the cost of hotline connections between several services: a centre for notifying factory workers via SMS; production of images, melodies, ringtones, logos, and mobile games; website design for selling content.
2002–2024