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The option is activated by configuration parameter in /etc/dpi/fastdpi.conf:
ntf_server=192.168.0.18/ntf
Here 192.168.0.18/ntf - is the name or the address of the server1) that hosts information page.
You can include a part of the path into the address. It allows using the same server for several services.
1)
In case this parameter ends by ? or &: the parameter UrlRedir is added to the formed URL. It points to a page selected by a subscriber.