Firewalls and Tunnels
5-28
Hewlett-Packard Company Virtual Private Networking Concepts Guide
Inbound Proxy
Inbound Proxy
Inbound Proxy
Inbound Proxy
Inbound proxies allow devices on a black (untrusted) subnet to
establish communication sessions with a device on a red
(trusted) subnet. Inbound proxies can grant access to services
executing on devices on a red (trusted) subnet having unrouted
or private IP addresses. When you define an inbound proxy, the
devices on the black (untrusted) network must address their
packets to the black (untrusted) interface of the VPN device. The
VPN device then looks at where the packet originated, what the
destination address is, what the destination port is, and decides
to which address on the red (trusted) network to send the
packet.
Figure:
Figure:
Figure:
Figure: Inbound and Outbound Proxies
Inbound and Outbound Proxies
Inbound and Outbound Proxies
Inbound and Outbound Proxies
If you want to allow SMTP mail from people on the Internet to
be sent into a mail server, define an inbound proxy as described
in the following table.
Internet
;;;;
;;;;
yyyy
yyyy
Other Network
Devices on
10.1.1.xxx
IP=10.1.1.2
Mail Server
Red IP=10.1.1.1
Primary Black IP=
205.250.128.240
Secondary Black IP=
205.250.128.21
