emqx 關閉匿名訪問和必須匹配身份認證才能訪問

修改 /etc/emqx/emqx.conf 的配置項

## Allow anonymous authentication by default if no auth plugins loaded.
## Notice: Disable the option in production deployment!
##
## Value: true | false
allow_anonymous = false

## Allow or deny if no ACL rules matched.
##
## Value: allow | deny
acl_nomatch = deny

重啟emqx

emqx restart