ADS-TEC RAP/RAC1000 User Manual - Manual (Page 193)

IT Infrastructure RAP/RAC1000
© ads-tec GmbH • Raiffeisenstr.14 • 70771 Leinfelden-Echterdingen
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12.6 E
XTENDED
B
ACKGROUND
S
CANNING AND
R
OUTER
With the increasing use of Wireless Controllers, there are also other safety functions that
have been integrated in the WLAN networks. For example, modern Wireless Controllers
filter out Ethernet packets and block WLAN Clients once these Clients use more than one
IP address. This always causes problems if Ethernet segments are to be bridged, i.e. if
there are still other devices, mostly linked via Ethernet, to be operated downstream from
the WLAN Client.
To solve this problem it is necessary to make sure that on the part of the Wireless
Controller only one IP address is used for each WLAN Client. The WLAN Client can
simultaneously be in two networks, one for the Wireless Interface and the other one for
the Ethernet Interface. Then however routing functions on the WLAN Client and respective
Gateway entries are required on all user devices.
For easier configuration, it is recommended to activate NAT (Network Address Translation)
on the WLAN Client. Thus the devices in the Wireless Network do not need to know of the
private Ethernet network downstream from the Client. In other words, Ethernet users are
“disguised“.
Further, Port Forwarding allows direct addressing of individual Ethernet Clients
downstream from a NAT Router so that for example a server can, within the wireless
network, query the devices downstream from the WLAN Client. Otherwise, each
communication has always to be started by the WLAN Clients.
The ads-tec WLAN devices offer the so-called „Extended Background Scanning und IP
Router“ mode for such environments the configuration of which will be explained in the
following.
Explanation of configuration by the example of the following topology:
192.168.0.0/255.255.255.0 is the private disguised network downstream from the WLAN
Clients.
10.0.0.0/255.255.255.0 is the real WLAN network where the Access Points and Clients
(WLAN-1 interface) are located.
The terminal must be configured with the correct Gateway address. In the given
example this is the HOST address of the WLAN Client (192.168.0.89).