User's Manual

How to Install the ISONAS IP-Enabled Reader-controller 45
 Using Port Forwarding to reach the Readers. This is common on
networks where the available number of IP addresses is limited. It can also
be used when the ISONAS software must communicate with Reader-
controllers on another site that is behind a network firewall.
As in the first topology, ISONAS Crystal software runs on a
server/workstation that is connected to a Ethernet network. The readers are
connected to a network, but because of the design of the network, the
readers can not be directly reached from the workstation/server. A router is
between the server/workstation and the readers. The router is configured to
implement Port Forwarding. The router will intercept and redirect the IP
communications to enable the server/workstation to communicate with the
Readers. This configuration allows you to connect many Readers without
consuming the primary network's IP address allotment.
Addressing: Each Reader-
controller unit is assigned an
IP address compatible with its
local network (not the
server/workstation network).
For example, assume the
reader’s local network uses IP
addresses in the range of
192.168.10.2 thru
192.168.10.254. In this
example, assume that the
Server/workstation has an IP
address of 84.117.31.158.
Port Addressing: (please refer
to Figure 28) Port forwarding
is a function of Routers, when
using this configuration the
ISONAS software does not
need the IP address of each
reader-controller, it just needs
the Port number associated
with each reader; however,
the software does need the IP
address of the Router.
Figure 28
Configuring the ISONAS software is easy, you simply define an ‘IP address’
with the address of the Router (in this example it is 84.117.31.16), then each
reader is given a unique Port number assignment under that server.