# US 2017/0288938 A1 · Secure Gateway

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- Number: US 2017/0288938 A1
- Document ID: US20170288938A1
- Status: Published application
- Kind: A1
- Application number: 15/476,996
- Filed: 2017-04-01
- Published: 2017-10-05
- Earliest claimed: 2016-04-04
- Assignees: MB connect line GmbH
- Applicants: MB connect line GmbH
- Inventors: Siegfried Müller
- Web page: https://patentgrep.com/patent/US20170288938A1

## CPC

- H04L 65/102: Gateways (arrangements for connecting between networks having differing types of switching systems, e.g. gateways, H04L12/66)
- H04L 12/66: Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
- H04L 63/02: {for separating internal from external traffic, e.g. firewalls}
- H04L 63/1416: {Event detection, e.g. attack signature detection}
- H04L 63/1458: {Denial of Service}
- H04L 63/1466: {Active attacks involving interception, injection, modification, spoofing of data unit addresses, e.g. hijacking, packet injection or TCP sequence number attacks}
- H04L 67/1036: Load balancing of requests to servers for services different from user content provisioning, e.g. load balancing across domain name servers
- H04Q 3/0025: {Provisions for signalling}
- G05B 19/4185: {characterised by the network communication}
- G05B 2219/31348: Gateway
- H04L 67/56: Provisioning of proxy services (store-and-forward switching systems in data switching networks H04L12/54)
- Y02P 90/02: Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04Q: SELECTING (switches, relays, selectors H01H; wireless communication networks H04W)
- G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G)
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

Gateway device (100), adapted to couple a first network with a second network, comprising: a first network interface device (102) coupled by a first interface to a first network and having a second interface; a second network interface device (104) coupled by a first interface with the second network and having a second interface; a network coupling device (103) adapted to transmit in a first status no data from the second interface of the second network interface device (104) to the second interface of the first network interface device (102) on the physical layer and adapted to transmit in a second status data from the second interface of the first network interface device (102) to the second interface of the second network interface device (104); wherein said network coupling device (103) includes a switching device (126, 128) coupled to a conductor (130, 134) coupling the second interface of the first network interface device (102) and second network interface device (104); wherein the switching device (126, 128) is connected such to the conductor (130, 134) that the conductor can not transmit data in a first state of the switching device and that the conductor can transmit data in a second state of the switching device and wherein said switching device (126, 128) is controlled by a manual switch (127) operated by a user.

## Claims

### Claim 1

Gateway device, adapted to couple a first network with a second network, comprising:
a first network interface device coupled by a first interface to a first network and having a second interface;
a second network interface device coupled by a first interface with the second network and having a second interface;
a network coupling device adapted to transmit in a first status no data from the second interface of the second network interface device to the second interface of the first network interface device on the physical layer and adapted to transmit in a second status data from the second interface of the first network interface device to the second interface of the second network interface device;
wherein said network coupling device includes a switching device coupled to a conductor coupling the second interface of the first network interface device and second network interface device;
wherein the switching device is connected such to the conductor that the conductor can not transmit data in a first state of the switching device and that the conductor can transmit data in a second state of the switching device; and
wherein said switching device is controlled by a manual switch operated by a user.

### Claim 2 (depends on 1)

Gateway device according to claim 1, wherein the layer 1 of the OSI reference model of the network coupling device is configured to transmit in the first status no data from the second network interface device to the first network interface device.

### Claim 3 (depends on 1)

Gateway device according to claim 1, wherein the second interface of the first network interface device is adapted that it can only receive data but cannot transmit data.

### Claim 4 (depends on 1)

Gateway device according to claims 1, wherein the network coupling device comprises a first conductor via which commands and/or data are transmitted from the second network interface device to the first network interface device, wherein in the first conductor a switching device is arranged, causing in its open state the first status of the networks coupling device, in which no data from the second network interface device can be transmitted to the network interface device, and which causes in its closed state the second status of the first networks coupling device, in which data from the second network interface device can be transmitted to the first network interface device.

### Claim 5 (depends on 1)

Gateway device according to claim 1, wherein the switching device comprises at least one of:
a pull up device coupling the conductor to a positive supply voltage;
a pull down device coupling the conductor to ground;
a pull down device coupling the conductor to a negative supply voltage;
a pull up device coupling the conductor to ground.

### Claim 6 (depends on 1)

Gateway device according to claim 1, wherein the networks coupling device is a serial interface, a serial bus or a serial data transmission device.

### Claim 7 (depends on 1)

Gateway device according to claim 1, wherein to the first interface of the network interface device a plurality of network members may be connected, wherein the first interface of the first network interface device supports at least one of the following protocols:
PROFIBUS;
PROFINET;
Ethernet;
Industrial Ethernet
CAN;
EtherCAT.

### Claim 8 (depends on 1)

Gateway device according to claim 1, wherein to the first interface of the second network interface device at least one network may be connected, wherein the first interface of the second network interface device supports at least one of the following protocols:
LAN;
WLAN
a mobile radio protocol;
a WLAN protocol.

### Claim 9 (depends on 1)

Gateway device according to claim 1, wherein the network interface device comprises a field bus processor.

### Claim 10 (depends on 1)

Gateway device according to claim 1, wherein the gateway device is configured to convert a protocol of a first interface of the first interface device in a protocol of the first interface of the first interface of the second interface device.

### Claim 11 (depends on 1)

Manufacturing apparatus, comprising the gateway device according to claims 1, wherein to the first interface of the first network interface device at least one manufacturing device is connected.

### Claim 12 (depends on 11)

Manufacturing apparatus according to claim 11, wherein the first interface of the second network interface device is connected with the internet.