====== Preparing white list ======
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The allowed resources list is created in two steps: first, **a text file** with the list of resources is created. Second, this **file is converted** into internal dictionary's format by the special utility.

<note tip>The following utilities are used for conversion:
  * url2dic - for URL, SNI, CN
  * ip2bin - for IP

Reverse conversion utilities:

  * dic2host - to convert dic files with URL, SNI, CN to a list of domains
  * dic2star - to convert dic files from SNI, CN to a list of domains with *
  * bin2ip - to convert dic files from IP

To create a white list for payment systems, we recommend using a ready-made list. [[https://github.com/cloudipsp/all_banks_ips|List of payment systems]]
</note>

After the text file is converted you need to move the lists to the DPI configuration directory:

<code bash>mv my_url_list.bin /var/lib/dpi/whlist.bin
mv my_cn_list.bin /var/lib/dpi/whlistcn.bin
mv my_ip_list.bin  /var/lib/dpi/whlistip.bin
mv my_sni_list.bin  /var/lib/dpi/whlistsni.bin</code>

<note important>This list names are used for the default profile.\\
Any of the lists may be missing, but for restricting https resources, the SNI list is mandatory</note>

===== The file format of the whitelisted resources' URLs: =====

Each line contains one URL (no <nowiki>http://</nowiki> prefix), it is allowed to use *. **For example:**
<code bash>1magehut.com/users.php?act=gallery&gal=81&page=4
3dmx.net
*.3dmx.net
</code>

To convert into the internal format:
<code bash>cat my_url_list.txt|url2dic my_url_list.dic</code>

===== The file format of the whitelisted names in SSL certificates (Common name): =====

Each line contains one [[dpi:dpi_options:opt_filtration:making_dictionary:cn_info|name]]. For example:
<code bash>*.facebook.com
www.vasexpertsdpi.com</code>

To convert into the internal format:
<code bash>cat my_cn_list.txt|url2dic my_cn_list.dic</code>

===== The file format of the whitelisted SNI (HTTPS) =====

Each line contains one SNI (without <nowiki>http://</nowiki> prefix). It is allowed to use *. **For expample:**

<code bash>qiwi.ru
*.qiwi.ru</code>

To convert into the internal format:
<code bash>cat my_sni_list.txt|url2dic my_sni_list.bin</code>

<note>To prevent the https sites blocking, you have to prepare white list for CN, SNI with *** symbol**, signaling that CN and SN can be any.</note>

====== File Format for White List of IP Addresses, CIDR: ======
Starting from version 12.4, the creation of a list is supported based on:
  * IPv4 <space> port_number
  * IPv4
  * IPv6 <space> port_number
  * IPv6
  * CIDR IPv4/IPv6

Each line of the file contains only one entry, example for IPv4:
<code bash>
78.47.115.34 443
95.211.6.93
95.211.4.0/24
</code>

Convert to internal format:
<code bash>cat my_ip_list.txt | ip2bin my_ip_list.bin</code>

<note>If an IP address or CIDR is specified, **ONLY ALL TCP ports except for the allowed IP/CIDR are blocked**. To block UDP ports, you need to enable the ''[[dpi:dpi_components:platform:subscriber_management:subsman_cmd#configuring_tcp_and_udp_protocol_blocking|udp_block=3]]'' setting in /etc/dpi/fastdpi.conf</note>