How To Block Utn Server Ports (Tcp Port Access Control) - SEH myUTN utnserver Pro User Manual

USB Deviceserver User Manual Linux
6.5

How to Block UTN Server Ports (TCP Port Access Control)

You can restrict access to the UTN server by blocking ports using 'TCP port access control' . If a port is blocked, the
protocols and/or services using this port cannot establish a connection with the UTN server. Thus attackers have
less room for attack.
The security level defines which port types are blocked:
• UTN access (blocks UTN ports)
• TCP access (blocks TCP ports: HTTP/HTTPS/UTN)
• All ports (blocks IP ports)
You have to define exceptions so that your desired network elements, e.g. clients or DNS servers, can establish a
connection with the UTN server.
WARNING
The ' test mode' is active by default so that you can test your settings without lock-
ing yourself out. Your settings will be active until the UTN is restarted, afterwards
access is no longer restricted.
After you have successfully tested your settings, you have to deactivate the test
mode so that access control is permanent.
1. Start the utnserver Control Center.
2. Select SECURITY – TCP port access.
3. Tick Port access control.
4. In the Security level area, select the desired protection
5. In the Exceptions area, define the network elements that are to have access to the UTN server. To do this, en-
ter the IP or MAC (hardware) addresses and tick the options.
Important:
• MAC addresses are not delivered through routers!
• The use of wildcards (*) allows you to define subnetworks.
6. Make sure that the Test mode is enabled.
7. Click Save & Restart to confirm.
The settings will be saved.
The port access control is activated until the device is restarted.
8. Check the port access and if it is possible to reach the utnserver Control Center.
Important:
If it is not possible to reach the utnserver Control Center, restart the UTN server 
80.
9. Deactivate the Test mode.
10. Click Save & Restart to confirm.
 The settings will be saved.
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