Digi IX30 User Manual page 604

Services
To limit access to hosts connected through a specified interface on the IX30 device:
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a. Click Interfaces.
b. For Add Interface, click .
c. For Interface, select the appropriate interface from the dropdown.
d. Click  again to allow access through additional interfaces.
To limit access based on firewall zones:
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a. Click Zones.
b. For Add Zone, click .
c. For Zone, select the appropriate firewall zone from the dropdown.
d. Click  again to allow access through additional firewall zones.
7. Click to toggle on Debug to write MQTT debug messages to the system log.
8. Click to toggle on Allow anonymous clients to allow connections from clients that do not
provide a username.
9. By default, the MQTT broker will allow clients without client IDs to connect, and will generate a
client ID for them. To disable, click to toggle off Allow zero length client id.
10. Click to toggle on Use username as client id. When enabled, the broker will replace the client
ID with the username, which will prevent one client from disconnecting another by using the
same client ID.
11. Add a client:
a. Click to expand Clients.
b. Click  to add a client.
c. Type the Username and Password for the client.
d. Add a topic to control this client's access to:
i. Click to expand Topic access control list.
ii. Click  to add a topic.
iii. For Topic, type the topic. The signal level wildcard, +, and multi-level wildcard, #, are
supported.
iv. For Access, select the level of access that the client will have:
IX30 User Guide
See Firewall configuration
Read
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Write
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Read/write
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for information about firewall zones.
Use the MQTT broker service
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