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====== Configuring Clickstream, DNS, SIP, FTP, and IPFIX export templates ======
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The option allows real-time recording of network traffic and can be used to monitor traffic for diagnostic purposes, analyze security threats and conduct market research. Traffic for diagnostic purposes, security threat analysis and market research.

<note important>Please note that when recording traffic, increased demands are placed on the disk subsystem. It also consumes additional memory and CPU resources.</note>

For Clickstream data analisys (subscribers' http requests) and SIP (VOIP unciphered data) on external systems IPFIX export is available.

A list of the correspondence between the Protocol and the port number in netfow5 can be found __[[en:dpi:dpi_options:opt_statistics:statistics_info|here]]__.

Any universal IPFIX collector that accepts templates or the __[[en:dpi:dpi_components:utilities:ipfixreceiver2|IPFIX Receiver]]__ utility is suitable for collecting information in IPFIX format.

To receive, process and store ClickStream, we suggest using the __[[en:dpi:qoe_analytics|QoE Store software]]__ and __[[en:dpi:dpi_components:dpiui|DPIUI2 graphical interface]]__.

If the link quality between SSG and NetFlow/IPFIX collector is insufficient, SSG skips sending some statistics to save performance. A message is displayed in ''fastdpi_alert.log'' when a chunk of information is skipped:

<code>
[NFLW] very long operation ….
</code>

Starting from version 12.0, the statistics for sending NetFlow/IPFIX information is now available (additional section in fastdpi_stat.log):

<code>
    [STAT    ][2022/11/20-17:55:03:213770] Statistics on NFLW_export : {a/b/c%/d/e}

    a - number of sending cycles
    b - number of sending cycles, when the time spent on sending exceeded the cycle execution period
    c - percentage of exceeding the number of sending cycles: 100 * b/a
    d - time of maximum sending cycle duration, microseconds
    e - time of the period of sending statistics, microseconds (''netflow_timeout'' parameter value (the parameter is set in seconds)).

    Example:
    [STAT    ][2022/11/20-17:55:03:213770] Statistics on NFLW_export : {7/0/0.00%/45297us/30008163us}
</code>
===== ClickStream export Setup =====
Clickstream experts is configured by following parameters: 

<code bash>
ipfix_dev=em1
ipfix_udp_collectors=1.2.3.4:1500,1.2.3.5:1501
ipfix_tcp_collectors=1.2.3.6:9418
dbg_log_mask=0x80
</code>

here
  * **''em1''** — NIC using for export. 
  * **''ipfix_udp_collectors''** — IP of udp collectors.
  * **''ipfix_tcp_collectors''** — IP of tcp collectors.
  * **''dbg_log_mask=0x80''** — logging statistics about export.

The ''ipfix_mtu_limit'' parameter sets the maximum UDP packet size when sending IPFIX. By default, it equals the minimum MTU of the interfaces used for sending.
==== IPFIX format template for Clickstream ====

The format of IPFIX templates for IPV6 differs only in the **IP_SOURCE** and **IP_DESTINATION** fields.

^  №	^  Size in bytes	^  Type 	^  IANA 	^  Description	^  Note  ^
|  1003	 |  16	|  IPv6	 |  43823	|IP_SOURCE	|Sender address|
|  1004	 |  16	|  IPv6	 |  43823	|IP_DESTINATION	|Recipient address|

^  IPFIX format template for Clickstream                                                                                                                                                                                                                                                           ^^^^^^
^  №                                      ^  Size in bytes  ^  Type         ^  IANA   ^  Description             ^  Note                                                                                                                                                                                ^
|  1001                                   |  4              |  int32        |  43823  | TIME_STAMP               |                                                                                                                                                                                      |
|  1002                                   |  -              |  string       |  43823  | LOGIN                    |                                                                                                                                                                                      |
|  1003                                   |  4              |  IPv4         |  43823  | IP_SOURCE                | Sender address                                                                                                                                                                       |
|  1004                                   |  4              |  IPv4         |  43823  | IP_DESTINATION           | Recipient address                                                                                                                                                                    |
|  1005                                   |  -              |  string       |  43823  | HOSTNAME/CNAME           |                                                                                                                                                                                      |
|  1006                                   |  -              |  string       |  43823  | PATH                     |                                                                                                                                                                                      |
|  1007                                   |  -              |  string       |  43823  | REFER                    |                                                                                                                                                                                      |
|  1008                                   |  -              |  string       |  43823  | USER_AGENT               |                                                                                                                                                                                      |
|  1009                                   |  -              |  string       |  43823  | COOCKIE                  |                                                                                                                                                                                      |
|  2000                                   |  8              |  int64        |  43823  | SESSION_ID               |                                                                                                                                                                                      |
|  1010                                   |  8              |  int64        |  43823  | LOCKED                   |                                                                                                                                                                                      |
|  1011                                   |  1              |  int8         |  43823  | HOST_TYPE                |                                                                                                                                                                                      |
|  1012                                   |  1              |  int8         |  43823  | METHOD                   |                                                                                                                                                                                      |
|  1013                                   |  2              |  int16        |  43823  | PORT_SOURCE              | Sender port                                                                                                                                                                          |
|  1014                                   |  2              |  int16        |  43823  | PORT_DESTINATION         | Recipient port                                                                                                                                                                       |
|  2016                                   |  2              |  int16        |  43823  | BRIDGE_CHANNEL_NUM       | Channel number (vchannel) or bridge. If vchannel is configured in the DPI configuration, then the channel number will be transmitted, otherwise the bridge number. Used in QoEStor.  |
|  1024                                   |  2              |  int16        |  43823  | CipherSuitesLen          | Size in bytes of the set of available CipherSuites encryption methods in the Client Hello message                                                                                    |
|  1025                                   |  -              |  raw          |  43823  | CipherSuites             | CipherSuites array in Client Hello (max 16 values)                                                                                                                                   |
|  58                                     |  2              |  int16        |  -      | VlanId                   | VLAN                                                                                                                                                                                 |
|  59                                     |  2              |  int16        |  -      | postVlanID               | POST VLAN                                                                                                                                                                            |
|  56                                     |  6              |  mac_address  |  -      | Source MAC Address       |                                                                                                                                                                                      |
|  57                                     |  6              |  mac_address  |  -      | Destination MAC Address  |                                                                                                                                                                                      |
|  2017                                   |  -              |  raw          |  43823  | MPLS Labels              |                                                                                                                                                                                      |
|  2018                                   |  4              |  int32        |  43823  | TCP Sequence             |                                                                                                                                                                                      |

**ND:** 
  * LOCKED = 1 — blocked by HTTPS, 2 — HTTP redirect, 3 — blocked by HTTP (transmitted by bitmask)
  * HOST TYPE = 1 in case of HTTP, 2 — CNAME, 3 — SNI, 4 — QUIC
  * METHOD = 1 — GET, 2 — POST, 3 — PUT, 4 — DELETE, 5 — CONNECT

If the configuration parameter ''http_parse_reply=1'' is enabled, information from responses to requests will be additionally transmitted. You can associate them with responses by the session identifier **SESSION_ID**, taking into account the order.

^  Clickstream export template IPFIX format for HTTP responses((for the IPv6 variant see difference above))  ^^^^^^
^  №  ^  Size in bytes  ^  Type  ^  IANA  ^  Description  ^  Note  ^
|  1001  |  4  |  int32  |  43823  |TIME_STAMP| 
|  1002  |  -  |  string  |  43823  |LOGIN|
|  1003  |  4  |  IPv4  |  43823  |IP_SOURCE|
|  1004  |  4  |  IPv4  |  43823  |IP_DESTINATION| 
|  1020  |  4  |  int32  |  43823  |RESULT_CODE|
|  1021  |  8  |  int64  |  43823  |CONTENT_LENGTH|
|  1022  |  -  |  string  |  43823  |CONTENT_TYPE|
|  2000  |  8  |  int64  |  43823  |SESSION_ID|
|  1023  |  -  |  string  |  43823  |LOCATION|
|  2016  |  2  |  int16  |  43823  |BRIDGE_CHANNEL_NUM| Channel (vchannel) or bridge number. If vchannel is set in the DPI configuration, the channel number will be transmitted, otherwise the bridge number will be transmitted|
|  58    |  2  |  int16  |  -  |VlanId|VLAN|
|  59    |  2  |  int16  |  -  |postVlanID|POST VLAN|
|  56    |  6  |  mac_address  |  -  |Source MAC Address|
|  57    |  6  |  mac_adress  |  -  |Destination MAC Address|
|  2017  |  -  |  raw  |  43823  |MPLS Labels|

If the configuration parameter ''ssl_parse_reply=1'' is enabled, information from responses to requests will be additionally transmitted. You can associate them with responses by the session identifier **SESSION_ID**, taking into account the order.

^  Clickstream export template IPFIX format for responses over SSL/TLS, HTTPS((for the IPv6 variant, see difference above))  ^^^^^^
^  №  ^  Size in bytes  ^  Type  ^  IANA  ^  Description  ^  Note  ^
|  1001  |  4  |  int32  |  43823  |TIME_STAMP|
|  1002  |  -  |  string  |  43823  |LOGIN| 
|  1003  |  4  |  IPv4  |  43823  |IP_SOURCE| 
|  1004  |  4  |  IPv4  |  43823  |IP_DESTINATION| 
|  2000  |  8  |  int64  |  43823  |SESSION_ID| 
|  1030  |  2  |  int16  |  43823  |SSL_VERSION| 
|  1031  |  2  |  int16  |  43823  |CIPHER_SUITE| 
|  1032  |  1  |  int8  |  43823  |COMPRESSION_METHOD|
|  2016  |  2   |  int16  |  43823  |BRIDGE_CHANNEL_NUM| Channel (vchannel) or bridge number. If vchannel is set in the DPI configuration, the channel number will be transmitted, otherwise the bridge number will be transmitted|
|  58    |  2   |  int16  |  -  |VlanId|VLAN|
|  59    |  2   |  int16  |  -  |postVlanID|POST VLAN|
|  56    |  6   |  mac_address  |  -  |Source MAC Address|
|  57    |  6   |  mac_adress  |  -  |Destination MAC Address|
|  2017  |  -   |  raw  |  43823  |MPLS Labels|
|  1011  |  1   | int8  |  43823  | type_host |
|  1005  |  -   | string  |  43823  | cname |


===== Metadata Export Setting =====
Export of metadata of other protocols for SORM is configured by the following parameters

<code bash>
ipfix_dev=em1
ipfix_meta_udp_collectors=1.2.3.4:1500,1.2.3.5:1501
ipfix_meta_tcp_collectors=1.2.3.6:9418
dbg_log_mask=0x80
</code>

where
  * **''em1''** — network interface name for export\\
  * **''ipfix_meta_udp_collectors''** — udp addresses of collectors\\
  * **''ipfix_meta_tcp_collectors''** — tcp addresses of collectors\\
  * **''dbg_log_mask=0x80''** — output of statistical information about export to the log

==== IPFIX metadata export template formats ====

^  SIP metadata export template IPFIX format  ^^^^^^
^  №  ^  Size in bytes  ^  Type  ^  IANA  ^  Description  ^  Note  ^
|  1001  |  4  |  int32  |  43823  | TIME_STAMP |
|  1002  |  -  |  string  |  43823  | LOGIN | 
|  1003  |  4  |  IPv4  |  43823  | IP_SRC | Sender's address |
|  1004  |  4  |  IPv4  |  43823  | IP_DST | Recipient's address |
|  2000  |  8  |  int64  |  43823  | SESSION_ID | 
|  3000  |  -  |  string  |  43823  | MSG_CODE | 
|  3001  |  2  |  int16  |  43823  | STATUS_CODE |
|  3002  |  -  |  string  |  43823  | [[https://en.wikipedia.org/wiki/Uniform_Resource_Identifier|URI]]| Uniform Resource Identifier |
|  3003  |  -  |  string  |  43823  | FROM|
|  3004  |  -  |  string  |  43823  | TO|
|  3005  |  -  |  string  |  43823  | [[https://en.wikipedia.org/wiki/Caller_ID|CALLID]]|
|  3006  |  -  |  string  |  43823  | [[https://en.wikipedia.org/wiki/User_agent|UAGENT]]| Client application|
|  3007  |  -  |  string  |  43823  | [[https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Type|CTYPE]]| Type of content to be transmitted |
|  3008  |  -  |  string  |  43823  | GATEWAYS |
|  58    |  2  |  int16  |  -  |VlanId|VLAN|
|  59    |  2  |  int16  |  -  |postVlanID|POST VLAN|
|  56    |  6  |  mac_address  |  -  |Source MAC Address|
|  57    |  6  |  mac_adress  |  -  |Destination MAC Address|
|  2017  |  -  |  raw  |  43823  |MPLS Labels|
**Notes:** \\
**IP_SRC** — IP SOURCE\\
**IP_DST** — IP DESTINATION\\
**GATEWAYS** — comma separated list of gateways (IP or hostname)

^  FTP Metadata Export Template IPFIX Format  ^^^^^^
^  №  ^  Size in bytes  ^  Type  ^  IANA  ^  Description  ^  Note  ^
|  1001  |  4  |  int32  |  43823  | TIME_STAMP |
|  1002  |  -  |  string  |  43823  | LOGIN | 
|  1003  |  4  |  IPv4  |  43823  | IP_SRC | Sender's address | 
|  1004  |  4  |  IPv4  |  43823  | IP_DST | Recipient's address |
|  2000  |  8  |  int64  |  43823  | SESSION_ID |
|  3050  |  -  |  string  |  43823  | SERVER_NAME | 
|  3051  |  -  |  string  |  43823  | USER| 
|  3052  |  -  |  string  |  43823  | PASSWORD |
|  3053  |  1  |  int8  |  43823  | MODE |
|  1020  |  4  |  int32  |  43823  |RESULT_CODE|
|  58    |  2  |  int16  |  -  |VlanId|VLAN|
|  59    |  2  |  int16  |  -  |postVlanID|POST VLAN|
|  56    |  6  |  mac_address  |  -  |Source MAC Address|
|  57    |  6  |  mac_adress  |  -  |Destination MAC Address|
|  2017  |  -  |  raw  |  43823  |MPLS Labels|

**Note:** the MODE field contains the FTP connection type 0 — active, 1 — passive

^  Messenger Metadata Export Template IPFIX Format (XMPP)  ^^^^^^
^  №  ^  Size in bytes  ^  Type  ^  IANA  ^  Description  ^  Note  ^
|  1001  |  4  |  int32  |  43823  | TIME_STAMP |
|  1002  |  -  |  string  |  43823  | LOGIN |
|  1003  |  4  |  IPv4  |  43823  | IP_SRC | Sender's address | 
|  1004  |  4  |  IPv4  |  43823  | IP_DST | Recipient's address |
|  2000  |  8  |  int64  |  43823  | SESSION_ID | 
|  3100  |  -  |  string  |  43823  | IM_LOGIN |
|  3101  |  -  |  string  |  43823  | IM_PASSW |
|  3102  |  -  |  string  |  43823  | IM_SCREEN_NAME |
|  3103  |  -  |  string  |  43823  | IM_UIN | Universal Internet number |
|  3104  |  1  |  int8  |  43823  | IM_PROTOCOL | Type of protocol used |
|  3105  |  -  |  string  |  43823  | IM_RECEIVERS | 
|  1020  |  4  |  int32  |  43823  | RESULT_CODE |
|  58    |  2  |  int16  |  -  |VlanId|VLAN|
|  59    |  2  |  int16  |  -  |postVlanID|POST VLAN|
|  56    |  6  |  mac_address  |  -  |Source MAC Address|
|  57    |  6  |  mac_adress  |  -  |Destination MAC Address|
|  2017  |  -  |  raw  |  43823  |MPLS Labels|

**Note:** the IM_PROTOCOL field contains the type of protocol used: 0 — ICQ, 7 — XMPP, 106 — ZELLO

^  IPFIX format of mail protocol metadata export template (POP, IMAP, SMTP)  ^^^^^^
^  №  ^  Size in bytes  ^  Type  ^  IANA  ^  Description  ^  Note  ^
|  1001  |  4  |  int32  |  43823  | TIME_STAMP | 
|  1002  |  -  |  string  |  43823  | LOGIN |
|  1003  |  4  |  IPv4  |  43823  | IP_SRC | Sender's address | 
|  1004  |  4  |  IPv4  |  43823  | IP_DST | Recipient's address |
|  2000  |  8  |  int64  |  43823 | SESSION_ID | 
|  3150  |  -  |  string  |  43823  | MAIL_SENDER |
|  3151  |  -  |  string  |  43823  | MAIL_RECEIVER | 
|  3152  |  -  |  string  |  43823  | MAIL_CC | Recipient of the copy |
|  3153  |  -  |  string  |  43823  | MAIL_SUBJECT |
|  3154  |  -  |  string  |  43823  | MAIL_SERVERS | 
|  3155  |  -  |  string  |  43823  | MAIL_REPLY |
|  3156  |  1  |  int8  |  43823  | EVENT | Event type |
|  3157  |  1  |  int8  |  43823  | ATTACHMENT | Indication of attachment |
|  3158  |  1  |  int8  |  43823  | MAIL_PROTOCOL | 
|  1020  |  4  |  int32  |  43823  | RESULT_CODE |
|  58    |  2  |  int16  |  -  |VlanId| VLAN |
|  59    |  2  |  int16  |  -  |postVlanID| POST VLAN |
|  56    |  6  |  mac_address  |  -  | Source MAC Address |
|  57    |  6  |  mac_adress  |  -  | Destination MAC Address |
|  2017  |  -  |  raw  |  43823  | MPLS Labels |

**Note:** the EVENT field indicates the event type 1 — send, 2 — receive, \\
ATTACHMENT sign of an attachment, mail_protocol = 0 — smtp, 1 — pop3, 2 — imap

^  The raw unparsed metadata export template IPFIX format  ^^^^^^
^  №  ^  Size in bytes  ^  Type  ^  IANA  ^  Description  ^  Note  ^
|  1001  |  4  |  int32  |  43823  | TIME_STAMP |
|  1002  |  -  |  string  |  43823  | LOGIN |
|  1003  |  4  |  IPv4   |  43823  | IP_SRC | Sender's address | 
|  1004  |  4  |  IPv4   |  43823  | IP_DST | Recipient's address |
|  2000  |  8  |  int64  |  43823  | SESSION_ID |
|  2013  |  1  |  int8   |  43823  | FLW_DIR | Directing the packet across interfaces |
|  2014  |  1  |  int8   |  43823  | DIR_DATA | Forwarding a packet by session |
|  2015  |  2  |  int16  |  43823  | VDPI_PROTO | The protocol that determined the DPI |
|  2900  |  2  |  int16  |  43823  | META_PROTO | Internal protocol identifier |
|  2901  |  -  |  string  |  43823  | RAW_DATA |
|    4   |  1  |  int8   |  -  | protocolIdentifier | PROTOCOL |
|    7   |  2  |  int16  |  -  | sourceTransportPort |
|   11   |  2  |  int16  |  -  | destinationTransportPort |
|    6   |  2  |  int16  |  -  | tcpControlBits |
|  2018  |  4  |  int32  |  -  | TCP Sequence |
|  58    |  2  |  int16  |  -  |VlanId|VLAN|
|  59    |  2  |  int16  |  -  |postVlanID|POST VLAN|
|  56    |  6  |  mac_address  |  -  |Source MAC Address|
|  57    |  6  |  mac_adress   |  -  |Destination MAC Address|
|  2017  |  -  |  raw  |  43823  |MPLS Labels|
**Note:**
  * **''FLW_DIR''** — direction of packet on interfaces : 0 : subs → inet, 1 : inet → subs \\
  * **''DIR_DATA''** — direction of the packet by session: for TCP 0 : client → server, 1 : server → client, for UDP — from whom the first packet was recorded, he is considered the client\\
  * **''VDPI_PROTO''** — protocol that defined DPI\\
  * **''META_PROTO''** — internal protocol identifier (3 — SIP, 4 — FTP, 5 — SMTP, 6 — POP3, 7 — IMAP, 8 — XMPP, 9 — ICQ, 10 — RSS, 11 — NNTP, 12 — H323, 13 — ZELLO)\\
  * **''RAW_DATA''** — raw data

Aggregating ''raw_data'', ''clickstream'', ''http_reply'' and ''ssl_reply'' with session data requires additional processing or executing a database query with the ''session_id'' key, or support in the ''rcollector'' utility.

=====Configuring the export of DNS responses or DNS queries=====
DNS export is configured with the following settings:
<code bash>
ipfix_dev=em1
ipfix_dns_udp_collectors=1.2.3.4:1234
ipfix_dns_tcp_collectors=1.2.3.6:4567
</code>
where 
  * **''em1''** — the name of the network interface to export.\\ 
  * **''ipfix_dns_udp_collectors''** — UDP addresses of collectors.\\ 
  * **''ipfix_dns_tcp_collectors''** — TCP collector addresses.\\ 

The format of IPFIX templates for IPV6 differs in the format of the ''IP_SOURCE'' and ''IP_DESTINATION'' fields.

^  №     ^  Number of bytes  ^  Data type  ^  IANA  ^  Description    ^  Note                ^
|  1103  |  16               |  IPv6       | 43823  | IP_SOURCE       | Sender's address     |
|  1104  |  16               |  IPv6       | 43823  | IP_DESTINATION  | Recipient's address  |


^  DNS Export Template IPFIX Format                                                                                                                                                                                                                                                   ^^^^^^
^  №                                 ^  Number of bytes  ^  Data type    ^  IANA   ^  Description             ^  Note                                                                                                                                                                      ^
|  1001                              |  4                |  int32        |  43823  | TIME_STAMP               | Timestamp                                                                                                                                                                  |
|  1002                              |  -                |  string       |  43823  | LOGIN                    | Log in                                                                                                                                                                     |
|  1003                              |  4                |  IPv4         |  43823  | IP_SOURCE                | Sender's address                                                                                                                                                           |
|  1004                              |  4                |  IPv4         |  43823  | IP_DESTINATION           | Recipient's address                                                                                                                                                        |
|  1013                              |  2                |  int16        |  43823  | SOURCE PORT              |                                                                                                                                                                            |
|  1014                              |  2                |  int16        |  43823  | DESTINATION PORT         |                                                                                                                                                                            |
|  2000                              |  8                |  int64        |  43823  | SESSION_ID               | Session ID                                                                                                                                                                 |
|  3200                              |  1                |  int8         |  43823  | UDP/TCP                  | Transport: 0 --- UDP, 1 --- TCP                                                                                                                                            |
|  3201                              |  -                |  string       |  43823  | DOMAIN                   |                                                                                                                                                                            |
|  3202                              |  2                |  int16        |  43823  | RRCLASS                  |                                                                                                                                                                            |
|  3203                              |  2                |  int16        |  43823  | RRTYPE                   |                                                                                                                                                                            |
|  3204                              |  4                |  int32        |  43823  | TTL                      |                                                                                                                                                                            |
|  3205                              |  -                |  raw          |  43823  | RDATA                    |                                                                                                                                                                            |
|  58                                |  2                |  int16        |  -      | VlanId                   | VLAN                                                                                                                                                                       |
|  59                                |  2                |  int16        |  -      | postVlanID               | POST VLAN                                                                                                                                                                  |
|  56                                |  6                |  mac_address  |  -      | Source MAC Address                                                                                                                                                                                   ||
|  57                                |  6                |  mac_adress   |  -      | Destination MAC Address                                                                                                                                                                              ||
|  2017                              |  -                |  raw          |  43823  | MPLS Labels                                                                                                                                                                                          ||
|  2016                              |  2                |  int16        |  43823  | BRIDGE_CHANNEL_NUM       | Channel (vchannel) or bridge number. If vchannel is set in the DPI configuration, the channel number will be transmitted, otherwise the bridge number will be transmitted  |
|  224                               |  8                |  uint64       |  -      | ipTotalLength            | Total IP packet size                                                                                                                                                       |
|  3206                              |  2                |  uint16       |  43823  | DNS transaction id       | DNS Transaction ID                                                                                                                                                         |

An alternative is to save the data in a local text log. Parameters:
  * **''ajb_save_dns''** — a bit flag that controls whether to log to a text file and enable sending DNS queries via IPFIX.
    * **''ajb_save_dns=0''** — do not save
    * **''ajb_save_dns=1''** — enable saving DNS responses to a file
    * **''ajb_save_dns=2''** — enables sending DNS queries via IPFIX
    * **''ajb_save_dns=3''** — enables sending DNS requests via IPFIX and saving DNS responses to a file

<note tip>The filter for DNS **request** types to be sent via IPFIX is specified by the ''ajb_save_dns_request_types'' parameter. Values can be specified as ranges using a hyphen, as a list separated by commas, or as the keywords ''all'' (any value) and ''none'' (filter all values). By default, the parameter is set to ''all''.\\
The filter for DNS **response** types to be sent via IPFIX is specified by the ''ajb_save_dns_answer_types'' parameter. Values can be specified as ranges using hyphens, lists separated by commas, and the keywords ''all'' (any value) and ''none'' (filter all values). By default, the parameter is set to ''1,5,28''.</note>

  * **''ajb_dns_ftimeout''** — timeout (minutes) for switching to the next file
  * **''ajb_dns_bufsize''** — file write buffer
  * **''ajb_dns_fsize''** — file size limit
  * **''ajb_dns_path''** — path where to write

Switching to the next file occurs when the file size reaches ''ajb_dns_fsize'' or the file is not empty and ''ajb_dns_ftimeout'' has passed

''ajb_save_dns_format'': format for writing to a text file
  * **''ts''** - time
  * **''ipsrc''** — ip source
  * **''ipdst''** — ip destination
  * **''ssid''** — session id
  * **''login''** — understandable

  * **''host''** — the name of which the information was requested
  * **''rrtype''** — RR types
  * **''rrclass''** — RR class
  * **''ttl''** — TTL
  * **''rdlen''** — rdata size
  * **''rdata''** — the resource itself
  * **''psrc''** — port source
  * **''pdst''** — port destination
  * **''transport''** — how the DNS query was received.

Default: ''ts:ssid:login:ipsrc:ipdst:psrc:pdst:transport:host:rrtype:rrclass:ttl:rdlen:rdata''

=====Sending Template in IPFIX=====
  - Transport protocol TCP.\\ The Template is sent once after the TCP session is established.
  - Transport protocol UDP.\\ The Template is sent by default every 20 seconds. This is controlled by the ''ipfix_udp_template_timer'' parameter.
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