DSL VPN Services

Private VPN Solutions

DSL WAN

A private DSL solution allows clients to build a managed wide area network environment utilising the BT Wholesale and some LLU DSL networks.

End points at client sites can be either ADSL or SDSL if symmetric bandwidth is required, perhaps for a hosted application in a head office.

The private DSL solution does not operate in the same way as other VPN solutions that rely on unnecessary and expensive hardware at each site.
Sites are invisibly and privately tunnelled through the DSL network and connected to the core WAN router and isolated from the ‘Internet’.
Sites are provided with a pre configured router that is set-up to offer non-NAT routing to the WAN.
A range of internal IP addresses is allocated for all of the devices at each site.

End point ADSL can be provisioned using one of the BT IPStream fixed rate products (512K, 1Mb or 2Mb), or ADSL MAX where sites can download at up to 8Mb and upload at up to 800Kb. The actual rates will depend on the line quality and distance from the serving telephone exchange.

SDSL can be provisioned at up to 2Mb providing a symmetrical bandwidth. This is normally used where one of the sites needs to have a greater upload speed in order to serve data to the rest of the WAN. SDSL is usually provisioned over a LLU network, but in areas where this is not possible, BT Wholesale SDSL products are used.

Internet breakout can be provided in the data centre via a firewall gateway appliance. Additionally content filtering and rules based access control can be provisioned to restrict all or selected site access to the Internet. By provisioning the breakout in the data centre, Internet access for the WAN isn’t reliant on one of the VPN site’s connectivity (as it would be in a typical self managed VPN set-up).

Road warrior access. An important part of a VPN solution is the ability to allow selected users access to the network when away from one of the connected sites. This is achieved by adding a VPN gateway to the WAN in the data centre at the core of the network. Users can access the network via an encrypted tunnel over the Internet, from anywhere in the world, and access the WAN as if they were at one of the sites.

Outgoing VPN calls can also be set-up allowing links form the WAN to other networks, via an encrypted secure tunnel.

Hosted services. The private VPN solution is a hub and spoke design, where each site in the WAN is a spoke while the hub is hosted in a secure London data centre. This arrangement lends itself to making certain services available from the central location. The key benefit of this configuration is that the head office WAN link does not become saturated due to having to handle traffic for all of the sites. Allowing for future expansion; when a new site is added to the WAN, the size of the links to existing locations does not have to be increased to compensate. Removing this bottleneck provides a reliable and fast link into core applications and shared services, for example VOIP servers, file sharing storage or Email accounts.

Future expansion;

New sites can be added to the WAN with a short lead-time, assuming that a DSL service can be provisioned on an appropriate analogue telephone line.

Flexibility and reliability. There is a lot of flexibility built in to a managed solution which means that as your business grows, the service is able to evolve with you.

We are in control of all aspects of your service and this means that should there be a problem, we will know how to resolve it, without passing you around.

Enhanced care is a BT Wholesale service that allows us to raise faults 24 7. It also provides a 24 hour resolution of faults, rather than the standard 40 working hours, should they occur.

Monitoring: Your DSL sites can be monitored for connectivity 24 hours a day and should a fault be detected we will either automatically request the appropriate line tests or checks or notify the customer of a potential problem.

An example configuration is shown below;