Services Usethe MQTT broker service
IX20 User Guide
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Deny
v. Click again to add additional topics.
e. Click again to add additional clients.
12. Click to expand Encryption.
13. For Type, select either None or PSK.
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If PSKis selected:
a. Click to enable Use PSK identity as username to use the PSKidentity sent by the
client asits username.
b. (Optional) For Identifier, typea string that identifiesthe listener and is sent to the
clients.
c. Click to expand Pre-shared keys.
d. Click to add a pre-shared key.
e. For Identity, typethe identity sent to the client.
f. For Key, typeor paste the pre-shared key in hexadecimal format that is associated
with the client identity.
g. Click again to add additional pre-shared keys.
14. Click to expand Topic access control list.
The topic access control listscontrols what topics clients can access. If no topics are included,
then clientshave access to all topics. If any topics are listed, accessis restricted to only the
listed topics.
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To restrict accessfor anonymousclients to particular topics:
a. Click to expand Anonymous.
b. Click to add a topic.
c. For Topic, type the topic. The signal level wildcard, +, and multi-level wildcard, #,
are supported.
d. For Access, select the level of accessthat the client will have:
l
Read
l
Write
l
Read/write
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Deny
e. Click again to add additional topics.
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To restrict accessto topics based on pattern substitution:
a. Click to expand Pattern.
b. Click to add a topic.
c. For Topic, type the topic. The variables %cand %u can be used as substitutesfor
the client ID or username. If a variable is used, it can bethe only text for that level
of the hierarchy..
d. For Access, select the level of accessthat the client will have:
l
Read
l
Write
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