VPN Virtual Private Network
Data Connect Enterprise offers a full range of VPN capable products
A Virtual Private Network, or VPN, is a private communications network usually used within a company, or by several different companies or organizations, to communicate over a public network. VPN message traffic is carried on public networking infrastructure (e.g. the Internet) using standard (often insecure) protocols, or over a service provider's network providing VPN service guarded by well defined Service Level Agreement (SLA) between the VPN customer and the VPN service provider.
Secure VPNs use
cryptographic tunneling protocols to provide the necessary confidentiality
(preventing snooping), sender authentication (preventing identity spoofing), and
message integrity (preventing message alteration) to achieve the privacy
intended. When properly chosen, implemented, and used, such techniques can
provide secure communications over unsecured networks.
Secure VPN protocols include the following:
IPsec (IP security), an obligatory part of IPv6.
SSL used either for tunneling the entire network stack, such as in OpenVPN, or for securing what is essentially a web proxy. Although the latter is often called a "SSL VPN" by VPN vendors, it is not really a fully-fledged VPN.
PPTP (point-to-point tunneling protocol), developed jointly by a number of companies, including Microsoft.
Some large ISPs now offer "managed" VPN service for business customers who want the security and convenience of a VPN but prefer not to undertake administering a VPN server themselves. In addition to providing remote workers with secure access to their employer's internal network, sometimes other security and management services are included as part of the package, such as keeping anti-virus and anti-spyware programs updated on each client's computer.
Trusted VPNs do not use
cryptographic tunneling, and instead rely on the security of a single provider's
network to protect the traffic. Multi-protocol label switching (MPLS) is
commonly used to build trusted VPNs. Other protocols for trusted VPNs include:
L2F (Layer 2 Forwarding), developed by Cisco.
L2TP (Layer 2 Tunnelling Protocol), including work by both Microsoft and Cisco.
L2TPv3 (Layer 2 Tunnelling Protocol version 3).
Tunneling, also known as "port forwarding," is the transmission of data intended for use only within a private, usually corporate network through a public network in such a way that the routing nodes in the public network are unaware that the transmission is part of a private network. Tunneling is generally done by encapsulating the private network data and protocol information within the public network transmission units so that the private network protocol information appears to the public network as data. Tunneling allows the use of the Internet, which is a public network, to convey data on behalf of a private network.
A well-designed VPN can greatly benefit a company. For example, it can:
We offer VPN products from many manufacturers. Here is are product by one of our leading manufactuerers, ADTRAN
|ADTRAN VPN Products Please contact us|
|Adtran NetVanta VPN Software 50 Users 1200360L1#50|
|Adtran VPN Software 100 Users 1200360L1#100|
|Adtran NetVanta VPN Software 5 Users 1200360L1#5|
|Adtran NetVanta VPN Software 10 Users 1200360L1#10|
|NetVanta 3305 VPN Upgrade 4200368L1|
|Adtran 3305 Chassis VPN 4200880L2|
|Adtran NetVanta 3305 T1 FT1 VPN 4200882L2|
|Adtran 3305 T1 FT1 DSX-1 VPN 4200883L2|
|Adtran NetVanta 2300 NetVanta VPN 4200366L1#10|
|Adtran NetVanta 2400 NetVanta VPN 100 users 4200367L1#100|
|NetVanta 3205 56/64K VPN Bundle 4200871L2|
|Adtran NetVanta 3205 T1 FT1 VPN 4200872L2|
|Adtran 3200 Chassis VPN Bundle 4200860L2|
|Adtran 3200 56/64K NIM VPN 4200861L2|
|Adtran 3205 T1 FT1 DSX-1 VPN 4200873L2|
|Adtran 3205 Chassis VPN 4200870L2|
|Adtran 3200 T1 / FT1 VPN Bundle 4200862L2|
|Adtran 3200 T1 / FT1 DSX-1 VPN 4200863L2|
|Adtran NetVanta Internet Security Firewall Appliances|
|Adtran 2050 1202362L2|
|Adtran NetVanta Routers|
|Adtran NetVanta 3305 T1 FT1 4200882L1|
|Adtran 3305 1200880L1|
|Adtran 3305 T1 FT1 DSX-1 4200883L1|
|Adtran NetVanta 3200 T1 / FT1 4200862L1|
|Adtran Netvanta 1224 1200500L1 24 Port Managed Switch|
|Adtran NetVanta 2100 1200361L2|
|Adtran NetVanta 2050 1200362L1|
|Adtran Netvanta 1224ST 1200504L1|
|Adtran NetVanta 2300 1200366L1|
|Adtran TSU NetVanta Router Module EFP 1202350L2|
|Adtran NetVanta 2400 1200367L1|
|Adtran NetVanta 3205 Serial 4200876L1|
|Adtran NetVanta 3205 T1 FT1 4200872L1|
|Adtran NetVanta 2000 NetVanta 2050, NetVanta 2100, NetVanta 2300 ,NetVanta 2400, NetVanta VPN Client|
|Adtran 3200 Chassis 1200860L1|
|Adtran 3205 Chassis 1200870L1|
|Adtran NetVanta 3205 56k/64k 4200871L1|
|Adtran NetVanta 3200 Serial 4200866L1|
|Adtran 3205 DC Chassis 1200980L1|
|Adtran 3205 T1 FT1 + DSX-1 4200873L1|
|Adtran NetVanta 3200 with 56k/64k NIM 4200861L1|
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