====== White List and Captive Portal (Service 5)======
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<note>[[dpi:dpi_options:opt_capture|Product Description]]</note>
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<accordion-item title="1. Can Subnets be Added to the IP Address File and Can Ports Other Than 443 be Used, such as 80?">
In the IP address list, only port 443 can be used. If it is necessary to allow URLs like ''http://192.162.1.1/myfunction?p=1'', you only need to add the required IP address to the whitelist of URLs or sites, **for example**:
<code bash>
  1magehut.com/users.php?act=gallery&gal=81&page=4
  3dmx.net
  192.162.1.1
</code>
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<accordion-item title="2. Is it Possible to Use a Mask in Domain Names in the File? For Example, to Avoid Listing All Third-Level Domains.">
Unfortunately, using full regular expressions in the search algorithm would significantly impact DPI performance. To address this problem, we suggest the following solution:
  - Configure clickstream recording to a file with the host parameter (hostname) — [[dpi:dpi_options:opt_li:li_settings|see metadata recording point http]]
  - To compute third-level domains, use the following command:<code bash>grep yandex.ru clickstream.txt | sort -uniq</code>
As a result, you will get a list of third-level domains used by subscribers on your network.
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