WAGO 758-915 Manual

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WAGO 758-915 Manual Manual pdf 69 page image

WAGO-I/O-SYSTEM 758 Appendix 69758-915 Bluetooth ® ETHERNET GatewayManualVersion 1.1.0, applicable from FW/HW Version 01/018.6 Data Security for Radio TransmissionIt is often assumed that wireless communication systems are less secure than line-connected systems. When used and operated correctly, wireless systems offer atleast an equivalent level of security.The following conditions must apply before an unauthorized user can obtainaccess to data exchanged via wireless communication:1. The attacker must be familiar with the communication system in use and bewithin the operating range of the system.2. Radio transmission must take place without the use of any securitymechanisms offered by this technology or the attacker must have adequatemeans to determine the security code.A Bluetooth® network whose devices are set such that they do not reply to searchrequests by outside devices can only be detected using special instruments andonly within the short radius around the transmitting devices. This is primarily dueto the FHSS that is used which ensures that the frequency of the transmissionchannel is changed up to 1600 times per second. This not only improvescoexistence, but also makes interception of the transmitted data extremelydifficult. To enjoy the benefits of this security mechanism, go to “Bluetooth >Security” and set the parameter “Visible for other devices” to “no”.The security mechanism is activated automatically when conductingconfiguration using the Mode membrane button!If a link between WEGs is being configured using the Mode membrane button,the devices automatically activate this security setting (“Bluetooth > Security” >Parameter “Visible for other devices” = “no”).Even when a Bluetooth® network is located at a location with public access and apotential attacker is aware of the network, data transfer can nevertheless only beintercepted using special equipment either when transmission is conductedwithout encryption, or when a non-secure code is used. To achieve the best level of security go to “Bluetooth > Security > Passkey”and select a secure code consisting of up to 16 characters that is neitherobvious, nor made up of a simple string of characters and, under “Bluetooth> Security”, set the parameter “Security Mode” to “on”.