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New as of v14.1.0 (beta)
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Configuration of the proxy for a gateway connection to the telematics infrastructure

Last adaption: 09.2026

New:
Last updated: 
    06.2026
  • The field for the ‘'Outgoing IP’' has been removed
  • There are implicit rules that enable updates from the connector to the card terminals
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This article refers to a Beta version
Access: UTM-IP:Port or UTM-URL:Port
Port as configured at Network / Appliance Settings / Webserver
Default-Port: 11115
i.e.: https://utm.ttt-point.de:11115
Default: https://192.168.175.1:11115 Applications TI Proxy


Introduction

Network structure of the TI proxy

The TI proxy can be used to enable secure communication between card terminals and TI connectors of the telematics infrastructure. The proxy forwards the terminal's data traffic via a WireGuard tunnel to a cloud gateway that manages access to the telematics infrastructure.


TI Proxy Wizard

TI Proxy Wizard

Step 1 - Import configuration

Step 1 Import configuration
Caption Value Description TI Proxy Wizard UTMuser@firewall.name.fqdn Applications TI Proxy
Step 1 - Import configuration
Files: Browse... No files selected. If available, configuration files can be uploaded here
WireGuard configuration: [Interface]
Address = 203.113.0.113/32
ListenPort = 51820
...		 Inserting/uploading the configuration information for WireGuard from the config file
TI-Proxy Configuration: tiaas:
 wireguard:
  ip: 203.113.0.113
...		 Inserting/uploading the configuration information for the TI proxy from the config file

Step 2 - Interface

Step 2 Interface
Interface: wg0 Used WireGuard Interface
Step 2 - Interface
Name: wireguard-interface-wg0-ti-proxy Name of the WireGuard Connection
IPv4 address: 203.113.0.113/32 IPv4 address in the transfer network for the local network interface
IPv6 address:    /64 IPv6 address in the transfer network for the local network interface
Listening Port: 51820 Port of the WireGuard Connection
Private Key: Generate automatically Enter key value directly Select from keys Private key of the WireGuard connection
Release server networks globally:     Networks that are to be enabled for the WireGuard connection. Not required here.

Step 3 - Peer

Step 3 Peer
Peer type: PeerAD userLocal user
Step 3 - Peer
Name: wg0-peer-1 Name of the Peers
Release peer networks: »192.168.12.0/24»192.168.13.12/30»192.168.13.16/30»192.168.13.24/30 ... Networks of the peer that are to be released
Endpoint: 203.113.0.113 Public IP address under which the WG tunnel for the connector is received
Endpoint Port: 60010 The corresponding port
Open Key: Enter key value directly Calculate from private key value Select from keys Public key of the peer
Pre-Shared Key:     Pre-shared key to further secure the connection
Keepalive: On 25 Seconds Sends a signal regularly. This keeps connections on NAT routers open.

Step 4 - TI Proxy

Step 4 TI Proxy
Connector IP: 10.180.96.90/--- IP address of the connector that enables the connection to the telematics infrastructure
usually a private IP address from a VPN
Step 4 - TI Proxy
Incoming IP: 10.0.2.1/--- IP address of the WG interface

Step 5 - Advanced Settings

Step 5 Advanced Settings
Create routes to the peer's networks: Yes Routes are created to the networks/hosts that were entered in step 3 under ‘'Enable peer networks’', with the interface that was displayed in step 2 as the gateway.
Step 5 - Advanced Settings
Create zones: Yes Creates new zones for the WireGuard interface
Zones: wireguard-wg0
firewall-wireguard-wg0		 Name of the new Zone
Create network objects for the peer: Yes Creates network objects for remote station
Network objects for the peer: »wg-net-wg0-peer-1-1»wg-net-wg0-peer-1-2»wg-net-wg0-peer-1-3
...		 Network objects that are created for the remote station. The automatic proposal can also be changed.
Network group: wg0-networks Name of the network group of the connection is displayed
Create rules between the peer and internal-networks: Yes Generates autogenerated rules that facilitate commissioning
Control group: wg0-network Name of the control group is displayed

General Configuration

General
Caption Value Description Applications UTMuser@firewall.name.fqdn TI-Proxy
General configuration of the TI proxy
Connector IP: 10.180.96.90/--- IP address of the connector that enables the connection to the telematics infrastructure
usually a private IP address from a VPN
Incoming IP: 203.113.0.113 (A0) IP address of the interface of the UTM that establishes the connection to the connector
Connection to a connector via WireGuard (incoming IP)
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This variant is the standard configuration in practice.


Connector IP: 10.180.96.90/--- IP address of the connector that enables the connection to the telematics infrastructure
usually a private IP address from a VPN
WireGuard tunnel as ‘'Incoming IP’'
Incoming IP: 10.0.2.1 (wgx) Tunnel IP address of the WG interface that establishes the connection to the connector
  • As a rule, the following values should ‘’'not be changed'‘’.
    • Rekey After Time: 120 Seconds Defines the period of time after which a new key agreement (rekeying) is to be carried out. (Minimum: 120 seconds)
    Reject After Time: 180 Seconds Defines the period of time after which a peer is considered inactive after the last packet received and packets are discarded.(Minimum: 180 seconds)

    Configure card terminal proxy

    Card terminal proxy
    In the card terminal proxies area, add a proxy for a card terminal as follows:
    Caption Value Description Add Card terminal proxy UTMuser@firewall.name.fqdn Applications TI-Proxy
    Add card terminal proxy dialog
    Card terminal IP: 192.168.175.71/--- IP address of the card terminal in the internal network
    Card terminal port: 4742 Port of the card terminal via which communication takes place
    Incoming and outgoing port: 60000 Port on which the UTM receives the data packets
    Configuration with the button Save and close
    • If a connection to the card terminal could be established, the name is displayed
    • If the error message Error: failed to restart ctproxy appears, this means that the proxy cannot reach the connector
    • Several card terminals can be added, these can also be located in different local networks
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      New as of v14.0.9
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    Card terminals on other networks (e.g. via VPN or site-to-site) require advanced configuration. For further details, see the article TI-Proxy with routed networks.
    		 TI-Proxy UTMuser@firewall.name.fqdn Applications

    Status of the Implicit Rule
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    New as of v14.0.8.2
    		 An implicit redirect rule is enabled. By enabling the implicit rules, TCP connections from the connector to the card terminals are forwarded via DESTNAT.
    This allows updates of the card terminals from the connector.
    The implicit rule is disabled. Updating the card terminals from the connector is not possible.
    Enables the implicit rule
    Disables the implicit rule
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