Function description
Operating Manual PCOM sec br2
1004534-EN-04
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5.1
Block diagram
Power
Network
(unprotected)
Device
(protected)
Mass
Storage
Supply
I0
Input
A1
A2
U
SB
O0
24 V 0 V
FE
(X2)
(X1)
(X5)
(X3)
(X3)
(X3)
(X4)
U
SB
+ 24 V DC
5.2
VPN tunnel
VPN tunnel
Client PC
(VPN client)
User
Unprotected
network
Security Bridge
Protected
network
(local network)
PSS 4000
PNOZmulti
Fig.: VPN tunnel
The SecurityBridge acts as VPN server, through which a Virtual Private Network (VPN) can
be established to one or more client PCs (configuration PC). This enables tap-proof, manip-
ulation-proof data transfer between the client PC and SecurityBridge.
}
Only the VPN client from Pilz is supported.
}
Up to 5 client connections can exist simultaneously.
}
A VPN tunnel can only be built by authenticated, authorised users.
}
Data is transferred through the VPN tunnel in an encrypted form.
}
Existing VPN connections can be displayed via a digital output on the module.
}
As a minimum the user must have permission from the group "PNOZmulti permissions",
"Network permission" or "PSS 4000 permissions” or "Generic Device permissions".
}
After 5 failed login attempts from the same client IP address, further login attempts with
the same IP address will be blocked for 10 minutes.