6 Configure the Operation Modes
with your local regulations for the channels you are entitled to use. This manual is just informa-
tive, it is in no way a reproduction of local regulations. The available
CountryRegion
values are
FCC(1-11)
for North America,
ETSI(1-13)
for Europe in general,
SPAIN(10-11)
,
FRANCE(10-13)
and
MKK(14)
in Japan. Late information indicate even in Spain and France the full range of ETSI
is now legal; check yourself. In Infrastructure Mode the NetCom
+
adapts to the configuration of
the Access Point. Be sure to have the correct Country/Region to match the parameters of the
Access Point. The Access Point must broadcast the SSID, otherwise the NetCom
+
will not contact
it.
The
Channel
is used in
AP
mode. Depending on the Country Region the selection is restricted. In
Infrastructure Mode this value is defined by the Access Point, and NetCom
+
will use the same.
Encryption Type
defines the encryption of the radio transmission. It may be configured as
Off
,
WEP, WPA-PSK/TKIP
or
WPA2
.
ServerConfig
+--------------------+
|
Off
|
|
WEP
|
|
WPA-PSK/TKIP
|
|
WPA2
|
+--------------------+
Figure 64: Wireless Encryption Modes
The WEP encryption may use 40 or 104 bit keys, sometimes also named WEP40/64 or WEP104/128.
Which of this is required is defined by the
Encryption Key
Parameter. This key may be entered
as ASCII characters, or as hexadecimal for a binary key. A string with 5 characters results in
WEP40 using an ASCII key. Using 10 characters as key defines this key as also WEP40, but with
a binary key in hexadecimal notation. Likewise a 13 character string is WEP104 with ASCII, and
26 characters select WEP104 with a binary key.
WPA Encryption is available using TKIP cypher, and WPA2 uses AES. The key is PSK (a Pre-
Shared Key) and must be installed on all stations. The ASCII password consists of 8 to 63 char-
acters, and is mixed with the SSID to generate the key.
It is recommended to use WPA/WPA2 with a key generated from random data. As with all en-
cryption options a strong key is required for protection. The Internet provides a little help and
background information.
6.2.1.4 Encrypted Communication
Web: menu “SERVER CONFIGURATION”, section “OpenVPN Parameter”.
Telnet: “ServerConfig”, option “OpenVPN”
There is a special way for encrypted communication with the NetCom Plus Serial Device Server.
This function establishes an encrypted VPN tunnel between your computer and the NetCom
+
.
All communication to the NetCom
+
uses this new connection. No application requires a change of
operation or source code, but seamlessly gets the advantages of Encryption. This may be especially
useful to get secure communication via an otherwise insecure Wireless LAN.
To build this tunnel NetCom
+
uses the Open Source product OpenVPN™
7
. To configure the VPN
function, NetCom
+
requests to upload a standard configuration file.
7
http://openvpn.net (Community)
September 2016
NetCom Plus User Manual
67
