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Using the BT Business Hub with VPN

The BT Business Hub is designed to inter-operate with a wide range of existing VPN options.

Outbound VPN client connections

Clients on a LAN can establish VPN connections to external VPN concentrators. The following examples show local network clients with three types of IP addressing:

Client Type A

Local clients with non-routable addresses issued by the BT Business Hub and that connect to the Internet via Network Address Translation (NAT/dynamic).

 

Client Type B

Clients for which the BT Business Hub firewall has been configured for DMZplus operation. In this scenario, the local client 'shares' the broadband IP address with the BT Business Hub. Only one client can share the broadband IP address. Therefore, only one computer may be configured for DMZplus at a time.


Client Type C

Client computers on the network for which a routable, static IP address has been configured. This IP address is configured either directly by changing the TCP/IP settings of the computer or by assigning the Static IP address automatically using the BT Business Hub address allocation feature.

VPN scheme

Client type

Supported configuration

L2TP Client

NAT (A)
DMZplus (B)
Static IP (C)

Fully Supported

PPTP Client

NAT (A)
DMZplus (B)
Static IP (C)

Fully Supported

IPSec Client

NAT (A)
DMZplus (B)
Static IP (C)

ESP Tunnel-mode only


 

Inbound connections to local VPN server

A VPN server can be hosted on the local network. However, to allow for remote clients to connect to the VPN server, the BT Business Hub firewall must be configured to Allow All Applications to pass through to the VPN server.

In the case where multiple broadband (static) IP addresses are not available, the single broadband IP address will be shared via the BT Business Hub DMZplus feature with the VPN server. As such, when only one broadband IP address is available, only one VPN server can be hosted on the local network.

Dual servers may be used to load balance VPN traffic using multiple public IP addresses.

VPN scheme

Supported configuration

Hosted L2TP Server

Fully supported when the firewall is configured to allow all applications.

Hosted PPTP Server

Fully supported when the firewall is configured to allow all applications.

Hosted IPSec Server

Fully supported when the firewall is configured to allow all applications.

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