---
name: "yadifad.conf"
section: "5"
platform: "linux"
package: "yadifa"
version: "3.0.2-3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/yadifad.conf"
---
# yadifad.conf(5)
configuration file for yadifad(8).
## NAME
yadifad.conf - configuration file for [*yadifad*(8)](/yadifad/8.md).
## SYNOPSIS
${SYSCONFDIR}/yadifa/yadifad.conf
## DESCRIPTION
The configuration of yadifad is consistent in a text file that can optionally include others. The general structure is a sequence of containers: a sequence of lines of text starting with a \ and ending with a \. Each line between these delimitters is in the form: variable-name value. The format of the value is determined by the type of the variable.
### TYPES
There are 15 types:
- *ACL*
A list of ACL descriptors. User-defined ACLs are found in the ACL section. The "any" and "none" descriptors are always defined. Elements of the list are separated by a "," or a ";".
- *DNSSECTYPE*
A DNSSEC type name. It can be a DNSSEC-enabled value ("nsec", "nsec3" or "nsec3-optout") or a DNSSEC-disabled value ("none", "no", "off" or "0").
- *ENUM*
A word from a specified set.
- *FLAG*
A boolean value. It can be true ("1", "enable", "enabled", "on", "true", "yes") or false ("0", "disable", "disabled", "off", "false", "no").
- *FQDN*
A fully-qualified domain name text string. e.g.: www.eurid.eu.
- *GID*
Group ID. (Can be a number or a name)
- *HOST(S)*
A (list of) host(s). A host is defined by an IP (v4 or v6) and can be followed by the word \`port' and a port number. Elements of the list are separated by a \`,' or a \`;'.
- *INTEGER / INT*
A base-ten integer.
- *NETMOD*
A word or integer that identifies the network model: \
**single or 0** Each working thread reads a single message, processes its answer and replies to it. \
**buffered or 1** Working threads are working by couple. One reads a single message and queues it, one de-queues it, processes its answer and replies to it. \
**multi or 2** Each working thread reads a multiple messages, processes their answers and replies to them. \
- *PATH / FILE*
A file or directory path. i.e.: "/var/zones".
- *STRING / STR*
A text string. Double quotes can be used but are not mandatory. Without quotes the string will be taken from the first non-blank character to the last non-blank character.
- *HEXSTR*
A hexadecimal even-length text string.
- *RELDATE*
A cron-like date to be matched, relative to another. The columns are minutes \[0;59\], hours \[0;23\], days \[0;31\], months \[1;12\], weekdays \[mon,tue,wed,thu,fri,sat,sun\] and week-of-the-month \[0;4\]. Multiple values can be set in a column cell using ',' as a separator. The '\*' character can be used to set all possible values of its column cell.
- *RELTIME*
A time offset relative to another. It's written as +integer\[unit-character\] (e.g.: +24h) where the unit character can be *s*econds, *m*inutes, *h*ours, *d*ays or *w*eeks.
- *SECONDS*
A base-ten integer.
- *HOURS*
A base-ten integer.
- *DAYS*
A base-ten integer.
- *UID*
User ID. (Can be a number or a name)
### CONTAINERS
The configuration of yadifad has several containers:
- **\**
General container
- **\**
TSIG keys
- **\**
Access lists
- **\**
NameServer IDentifier
- **\**
Response Rate Limiting directives
- **\**
Description of the domain name in specific attributes.
- **\**
Description of the logger outputs.
- **\**
Description of dnssec policies.
- **\**
Description of the key-suites needed if 'dnssec policies' are used.
- **\**
Description of the key-rolls needed if 'dnssec policies' are used.
- **\**
Description of the key-templates needed if 'dnssec policies' are used.
- **\**
Description of 'denial', this can be used in certain 'dnssec policies'.
The configuration supports included files.\
example: include /etc/yadifa/conf.d/local.conf
The configuration files can be nested.
The configuration consists of:
- **\***
Container, which starts with \ and ends with \
- **\***
Variable name
- **\***
1 or 2 arguments
- **\***
Arguments can contain 1 or more comma separated values.
### STANDARD SECTIONS
- **\**
General container, contains all the configuration parameters needed to start up yadifad.
- **allow-control** *ACL*
default: none
Default server-control access control list. Only the sources matching the ACL are accepted.
- **allow-notify** *ACL*
default: any
Default notify access control list. Only the servers matching the ACL will be handled.
- **allow-query** *ACL*
default: any
Default query access control list. Only the clients matching the ACL will be replied to.
- **allow-transfer** *ACL*
default: none
Default transfer access control list. Only the clients matching the ACL will be allowed to transfer a zone (*axfr*/*ixfr*).
- **allow-update** *ACL*
default: none
Default update access control list. Only the clients matching the ACL will be allowed to update a zone.
- **allow-update-forwarding** *ACL*
default: none
Default update-forwarding access control list. Only the sources matching the ACL are accepted.
- **answer-formerr-packets** *FLAG*
default: true
If this flag is disabled; the server will not reply to badly formatted packets.
- **axfr-compress-packets** *FLAG*
default: true
Enables the *dns* packet compression of each *axfr* packet.
- **axfr-max-packet-size** *INT*
default: 4096 bytes
The maximum size of an *axfr* packet. (MIN: 512; MAX: 65535)
- **axfr-max-record-by-packet** *INT*
default: 0
The maximum number of records in each *axfr* packet. Older name servers can only handle 1. Set to 0 to disable the limit. (MIN: 0; MAX: 65535)
- **axfr-retry-delay** *SECONDS*
default: 600
Number of seconds between each retry for the first transfer from the primary name server. (MIN: 60; MAX: 86400)
- **axfr-retry-jitter** *SECONDS*
default: 180
Jitter applied to axfr-retry-delay. (MIN: 60; MAX: axfr-retry-delay)
- **axfr-retry-failure-delay-multiplier** *INT*
default: 5
Linear back-off multiplier. The multiplier times the number of failures is added to the xfr-retry-delay. (MIN: 0; MAX: 86400)
- **axfr-retry-failure-delay-max** *SECONDS*
default: 3600
Maximum delay added for the back-off. (MIN: 0; MAX: 604800)
- **axfr-strict-authority** *FLAG*
default: yes (unless --enable-non-aa-axfr-support was used)
Tells yadifad to be strict with the AA flag in AXFR answers
- **chroot** *FLAG*
default: off
Enabling this flag will make the server jail itself in the chroot-path directory.
- **chroot-path; chrootpath** *PATH*
default: /
The directory used for the jail.
- **cpu-count-override** *INT*
default: 0
Overrides the detected number of logical cpus. Set to 0 for automatic. (MIN: 0; MAX: 256)
- **daemon; daemonize** *FLAG*
default: false
Enabling this flag will make the server detach from the console and work in background.
- **data-path; datapath** *PATH*
default: zones
The base path were lies the data (zone file path; journaling data; temporary files; etc.)
- **do-not-listen** *HOSTS*
default: -
An exclusion list of addresses to never listen to. If set, 0.0.0.0 and ::0 will always be split by interface to isolate the address.
- **edns0-max-size** *INT*
default: 4096
*edns0* packets size. (MIN: 512; MAX: 65535)
- **gid; group** *GID*
default: 0 (or root)
The group ID that the server will use.
- **hidden-primary; hidden-master** *FLAG*
default: no
As a hidden primary more CPU will be used for various maintenance tasks.
- **hostname-chaos; hostname** *STR*
default: the host name
The string returned by a hostname-chaos TXT CH query.
- **keys-path; keyspath** *PATH*
default: zones/keys
The base path of the *dnssec* keys.
- **listen** *HOSTS*
default: 0.0.0.0,::0
The list of interfaces to listen to.
- **log-files-disabled** *FLAG*
default: no
If set, disables checking the log-path directory for existence and writing rights.
- **log-path; logpath** *PATH*
default: log
The base path where the log files are written.
- **log-unprocessable** *FLAG*
default: off
Enabling this flag will make the server log unprocessable queries.
- **max-tcp-queries; max-tcp-connections** *INT*
default: 16
The maximum number of parallel *tcp* queries; allowed. (MIN: 1; MAX: 255)
- **network-model** *NETMOD*
default: multi
Sets the networking model of yadifa.
- **pid-file; pidfile** *STR*
default: run/yadifad.pid
The pid file name.
- **queries-log-type** *INT*
default: 1
Query log format. (0: none; 1: *yadifa* format; 2: BIND format; 3: *yadifa* and BIND format at once)
- **serverid-chaos; serverid** *STR*
default: -
The string returned by a id.server. TXT CH query. If not set; REFUSED is answered.
- **server-port; port** *INT*
default: 53
The default *dns* port. (MIN: 1; MAX: 65535)
- **sig-validity-interval** *DAYS*
default: 30
The number of days for which an automatic signature is valid. (MIN: 7 days; MAX: 30 days)
- **sig-validity-jitter; sig-jitter** *SECONDS*
default: 3600
The signature expiration validity jitter in seconds (1 hour). (MIN: 0 sec; MAX: 86400 sec)
- **sig-validity-regeneration** *HOURS*
default: automatic
Signatures expiring in less than the indicated amount of hours will be recomputed. The default will be chosen by *yadifa*. (MIN: 24 hours; MAX: 168 hours)
- **statistics** *FLAG*
default: true
The server will log a report line about some internal statistics.
- **statistics-max-period** *SECONDS*
default: 60
The period in seconds between two statistics log lines. (MIN: 1 sec; MAX: 31 \* 86400 seconds (31 days))
- **tcp-query-min-rate** *INT*
default: 512 bytes/second
The minimum transfer rate required in a *tcp* connection (read and write). Slower connections are closed. The units are bytes per second. (MIN: 0; MAX: 4294967295
- **thread-affinity-base** *INT*
default: 0
Sets the first CPU to set affinity for. Set it to the real CPU of a core. (MIN: 0; MAX: 3)
- **thread-affinity-multiplier** *INT*
default: 0
Sets the multiplier choosing CPU to set affinity for. Allows avoiding hyperthread cores. Set to 0 for automatic avoiding. (MIN: 0; MAX: 4)
- **thread-count-by-address** *INT*
default: -1
Number of independent threads used to process each listening address. Set to -1 for automatic. Set to 0 for single threaded. (MIN: -1; MAX: number of CPU's)
- **uid; user** *UID*
default: 0 (or root)
The user ID that the server will use.
- **version-chaos; version** *STR*
default: yadifa version#
The text to include in the version TXT CH query.
- **xfr-connect-timeout** *SECONDS*
default: 5
Timeout for establishing a connection for *axfr* and *ixfr* transfers. Set to 0 to disable. (MIN: 0; MAX: 4294967295)
- **xfr-path; xfrpath** *PATH*
default: zones/xfr
The base path used for *axfr* and journal storage.
- **zone-download-thread-count** *INT*
default: 4
Number of independent threads used to download the zones. (MIN: 0; MAX: 255)
- **zone-load-thread-count** *INT*
default: 1
Number of independent threads used to process loading of the zones. (MIN: 0; MAX: 255)
- **zone-store-thread-count** *INT*
default: 1
Sets the number of threads used to store a zone on disk (MIN: 1, MAX: 4).
- **zone-unload-thread-count** *INT*
default: 1
Sets the number of threads used to delete a zone from memory (MIN: 1, MAX: 4).
- **worker-backlog-queue-size** *INT*
default: 16384
For network-model 1, sets the size of the backlog queue (MIN: 4096, MAX: 1048576).
- **\**
TSIG keys
- **algorithm** *ENUM*
default: -
Mandatory. Sets the algorithm of the key.
Supported values are:
- *hmac-md5*
- *hmac-sha1*
- *hmac-sha224*
- *hmac-sha256*
- *hmac-sha384*
- *hmac-sha512*
(the algorithm names are case insensitive)}
- **name** *FQDN*
default: -
Mandatory. Sets the name of the key.
- **secret** *TEXT*
default: -
Mandatory. Sets the value of the key. BASE64 encoded.
- **\**
Access lists
Each entry of the acl section defines a rule of access. Each rule is a name (a single user-defined word) followed by a rule in the form of a list of statements. The separator can be "," or ";". The "any" and "none" names are reserved. A statement tells if a source is accepted or rejected. Reject statements are prefixed with "!". Statements are evaluated in the following order: first from more specific to less specific, then from reject to accept. If a statement matches, the evaluation will stop and accordingly accept or reject the source. If no statement matches, then the source is rejected.
A statement can be either:
- **\***
An IPv4 or an IPv6 address followed (or not) by a mask.\
\[*!*\]ipv4 \|ipv6 \[*/mask*\]\
For example:
- **\***
internal-network 192.0.2.128/26;2001:DB8::/32
- **\***
The word \`key' followed by the name of a TSIG key.\
key key-name\
For example:
- **\***
slaves key public-slave;key hidden-slave
- **\***
An ACL statement name from the *acl* section. Note that negation and recursion are forbidden and duly rejected.\
acl-name\
For example:
- **\***
who-can-ask-for-an-ixfr primary;secondaries;127.0.0.1
- **\**
NameServer IDentifier
- **ascii** *STR*
default: ""
The string can be 512 characters long.
- **hex**
default: ""
- **\**
Response Rate Limiting directives
- **responses-per-second** *INT*
default: 5
Allowed response rate.
- **errors-per-second** *INT*
default: 5
Allowed error rate.
- **slip** *INT*
default: 2
Random slip parameter.
- **log-only** *FLAG*
default: false
If set to true, logs what it should do without doing it.
- **ipv4-prefix-length** *INT*
default: 24
Mask applied to group the IPv4 clients.
- **ipv6-prefix-length** *INT*
default: 56
Mask applied to group the IPv6 clients.
- **exempt-clients** *ACL*
default: none
Clients matching this rule are not subject to the RRL.
- **enabled** *FLAG*
default: false
Enables the RRL
- **min-table-size** *INT*
default: 1024
RRL buffer minimum size
- **max-table-size** *INT*
default: 16384
RRL buffer maximum size
- **window** *INT*
default: 15
RRL sliding window size in seconds
- **\**
Description of the domain name in specific attributes.
- **allow-control** *ACL*
default: as main
Control commands control list. Only the matching sources are allowed.
- **allow-notify** *ACL*
default: as main
Notify access control list. Only the servers matching the ACL will be handled.
- **allow-query** *ACL*
default: as main
Query access control list. Only the clients matching the ACL will be replied to.
- **allow-transfer** *ACL*
default: as main
Tansfer access control list. Only the clients matching the ACL will be allowed to transfer a zone (*axfr*/*ixfr*
- **allow-update** *ACL*
default: as main
Update access control list. Only the clients matching the ACL will be allowed to update a zone.
- **allow-update-forwarding** *ACL*
default: as main
Update forwarding control list. Only the matching sources are allowed.
- **dnssec-mode; dnssec** *DNSSEC-TYPE*
default: off
Type of *dnssec* used for the zone. As primary name sever; *yadifa* will try to maintain that state.
- **dnssec-policy** *STR*
default: -
Sets the dnssec-policy id to be used.
- **domain** *FQDN*
default: -
Mandatory. Sets the domain of the zone (i.e.: eurid.eu).
- **drop-before-load** *FLAG*
default: off
Enabling this flag will make the server drop the zone before loading the updated zone from disk. Use this on systems constrained for RAM.
- **file-name; file** *FILE*
default: -
Sets the zone file name. Only mandatory for a primary zone.
- **journal-size-kb** *INT*
default: 0
Puts a soft limit on the size of the journal; expressed in KB. (MIN: 0; MAX: 3698688 (3GB))
- **keys-path; keyspath** *PATH*
default: as main
The base path of the *dnssec* keys.
- **maintain-dnssec** *FLAG*
default: true
Enabling this flag will cause the server to try and maintain *rrsig* records
- **primaries; primary; masters; master** *HOSTS*
default: -
Mandatory for a secondary. Sets the primary server(s). Multiple primaries are supported.
- **multiprimary-retries; multimaster-retries** *INT*
default: 0
The number of times the primary is unreachable before switching to a different primary (MIN: 0; MAX: 255)
- **no-primary-updates; no-master-updates** *FLAG*
default: false
Enabling this flag will prevent the server from probing or downloading changes from the primary
- **notifies; also-notify; notify** *HOSTS*
default: -
The list of servers to notify in the event of a change. Currently only used by primaries when a dynamic update occurs.
- **notify-auto** *FLAG*
default: true
Enabling this flag will cause *notify* messages to be sent to all name servers in the APEX. Disabling this flags causes the content of APEX to be ignored (*ns* Records).
- **notify-retry-count** *INT*
default: 5
Number of times *yadifa* tries to send a *notify*. (MIN: 0; MAX: 10)
- **notify-retry-period** *INT*
default: 1
Time period in minutes between two *notify* attempts. (MIN: 1; MAX: 600)
- **notify-retry-period-increase** *INT*
default: 0
Increase of the time period in minutes between two *notify* attempts. (MIN: 0; MAX: 600)
- **rrsig-nsupdate-allowed** *FLAG*
default: false
If this flag is set the server allows one to edit RRSIG records using dynamic updates.
- **sig-validity-interval** *DAYS*
default: as main
The number of days for which an automatic signature is valid. (MIN: 7 days; MAX: 30 days)
- **sig-validity-regeneration** *HOURS*
default: as main
The signatures expiring in less than the indicated amount of hours will be recomputed. (MIN: 24 hours; MAX: 168 hours)
- **sig-validity-jitter** *SECONDS*
default: as main
The signature expiration validity jitter in seconds. (MIN: 0 sec; MAX: 86400 sec)
- **true-multiprimary; true-multimaster** *FLAG*
default: off
Enabling this flag will make the server use *axfr* when switching to a new primary
- **type** *ENUM*
default: -
Mandatory. Sets the type of zone : either *primary*/*master* or *secondary*/*slave*.
- **\**
Description of the logger outputs.
It contains a list descriptions of user-defined outputs for the logger. Depending on the kind of output, the format is different.
The "name" is arbitrary and is used for identification in the \.\
The "stream-name" defines the output type (ie: a file name, a program output or syslog).\
The "arguments" are specific to the output type (ie: unix file access rights or syslog options and facilities).\
- **\***
file output stream channel-name file-name access-rights (octal).
- **\***
pipe to a program channel-name "\| shell command" channel-name "\| path-to-program program arguments \>\> append-redirect"
- **\***
STDOUT, STDERR output stream channel-name stdout channel-name stderr
- **\***
syslog channel-name syslog syslog-facility
- **\**
Description of the logger outputs sources.
Sets the output of a pre-defined logger from yadifad.\
The format of the line is: logger-name output-filter comma-separated-channel-names \
Filters are:\
*DEBUG7*, *DEBUG6*, *DEBUG5*, *DEBUG4*, *DEBUG3*, *DEBUG2*, *DEBUG1*, *DEBUG*, *INFO*, *NOTICE*, *WARNING*, *ERR*, *CRIT*, *ALERT*, *EMERG*\
Additionally, there are: \
- **\***
*ALL* (or '*\**') meaning all the filters.
- **\***
*PROD* means all but the DEBUG filters.
The defined loggers are: \
- **system**
contains low level messages about the system such as memory allocation, threading, IOs, timers and cryptography, ...
- **database**
It contains messages about most lower-level operations in the DNS database. ie: journal, updates, zone loading and sanitization, DNS message query resolution, ...)
- **dnssec**
contains messages about lower-level dnssec operations in the DNS database. ie: status, maintenance, verification, ...
- **server**
contains messages about operations in the DNS server. ie: start up, shutdown, configuration, transfers, various services status (database management, network management, DNS notification management, dynamic update management, resource rate limiting, ...)
- **zone**
contains messages about the loading of a zone from a source (file parsing, transferred binary zone reading, ...)
- **stats**
contains the statistics of the server.
- **queries**
contains the queries on the server. Queries can be logged with the BIND and/or with the YADIFA format.\
\
**BIND format:**\
\
client sender-ip#port: query: fqdn class type +SETDC (listen-ip)\
\
**YADIFA format:**\
\
query \[ id \] {+SETDC} fqdn class type (sender-ip#port)\
\
where:
- id
is the query message id
- \+
means the message has the Recursion Desired flag set
- S
means the message is signed with a TSIG
- E
means the message is EDNS
- T
means the message was sent using TCP instead of UDP
- D
means the message has the DNSSEC OK flag set
- C
means the message has the Checking Disabled flag set
- fqdn
is the queried FQDN
- class
is the queried class
- type
is the queried type
- sender-ip
is the IP of the client that sent the query
- port
is the port of the client that sent the query
- listen-ip
is the listen network interface that received the message
Note that on YADIFA any unset flag is replaced by a '-', on BIND only the '+' follows that rule.
System operators will mostly be interested in the info and above messages of queries and stats, as well as the error and above messages of the other loggers.
### DNSSEC-POLICY
There are 5 sections:
- **\**
The dnssec-policy section binds up to four key suites and a denial mode. It is meant to be used as a dnssec-policy parameter in a zone section. Usually two key-suite will be given: one for a KSK and one for a ZSK. The denial mode can be either 'nsec' either the name of a denial section.
- **id** *STR*
default: -
*id* of the dnssec-policy section.
- **description** *STR*
default: -
Description for the dnssec-policy section.
- **key-suite** *STR*
default: -
*id* of the *key-suite* to be used. Usually both a KSK and a ZSK suites are given.
- **denial** *STR*
default: nsec
*id* of the *denial* to be used for *nsec3* or the argument 'nsec' to use *nsec*.
- **\**
The key-suite section is used by dnssec policies and is meant to be referenced by a dnssec-policy section. A key-suite links a key definition (key-template) with a deployment calendar (key-roll).
- **id** *STR*
default: -
*id* of the key-suite section.
- **key-template** *STR*
default: -
*id* of the *key-template* to be used.
- **key-roll** *STR*
default: -
*id* of the *key-roll* to be used.
- **\**
The key-roll section is used by dnssec policies and is meant to be referenced by a key-suite section. It's essentially a deployment calendar. Each event is computed relatively to another. Dates are chosen so that there is always a key in an active state. Please look at the examples as a misconfiguration could easily span the life of a key over several years. (e.g.: by too restrictive on the matching conditions) If the RELDATE format is being used, the first valid date matching the line is used. Usage of the RELDATE format is recommended over the RELTIME one.
- **id** *RELDATE\|RELTIME*
default: -
*id* of the key-roll section.
- **generate** *RELDATE\|RELTIME*
default: -
Time when the key must be generated. Pre-dated before so it's active right now if it's the first one. Always computed so that the next activation happens before the last deactivation.
- **publish** *RELDATE\|RELTIME*
default: -
Time when the key must be published in the zone. Relative to the generation.
- **activate** *RELDATE\|RELTIME*
default: -
Time when the key will be used for signing the zone or apex of the zone. Relative to the publication.
- **inactive** *RELDATE\|RELTIME*
default: -
Time when the key will not be used anymore for signing. Relative to the activation.
- **delete** *RELDATE\|RELTIME*
default: -
Time when the key will be removed out of the zone. Relative to the deactivation.
- **\**
The key-template section is used by dnssec policies and is meant to be referenced by a key-suite section. It contains the various parameters of a key for its generation.
- **id** *STR*
default: -
*id* of the key-template section.
- **ksk** *FLAG*
default: false
When this flag is enabled a *ksk* will be generated. When disabled a *zsk* will be generated.
- **algorithm** *ENUM*
default: 7
Sets the algorithm of the key. Supported values are: *’DSA’*; *3*; *’RSASHA1’*; *5*; *’NSEC3DSA’*; *6*; *’NSEC3RSASHA1’*; *7*; *’RSASHA256’*; *8*; *’RSASHA512’*; *10*; *’ECDSAP256SHA256’*; *13*; *’ECDSAP384SHA384’*; *14*.
- **size** *INT*
default: 0
The length of the key in bits (incompatible sizes will be rejected). (MIN: 0; MAX: 4096)
- **\**
The denial section is used by dnssec policies and is meant to be referenced by a dnssec-policy section. It is used to define the NSEC3 denial parameters of a dnssec policy. Policies using a NSEC denial don't need to use this section.
- **id** *STR*
default: -
*id* of the denial section.
- **salt** *HEXSTR*
default: empty
A base16 encoded sequence of bytes used as the salt parameter of the NSEC3 chain.
- **salt-length** *INT*
default: 0
If the salt parameter isn't set, generates a random salt parameter of that length. (MIN: 0; MAX: 255)
- **iterations** *INT*
default: 1
Iteration parameter of the NSEC3 chain. (MIN: 0; MAX: 65535)
- **optout** *FLAG*
default: false
Enables opt-out coverage in the NSEC3 chain. When this flag is enabled, delegations which do not have a DS record will not be covered by an NSEC3 record.
## EXAMPLES
Examples of containers defined for a configuration file.
- **\***
Main
- 1\.
Main section example
```
# Detach from the console (alias: daemonize)
daemon off
# Jail the application
chroot off
# The path of the log files (alias: chroot-path)
chrootpath "/chroot/yadifad"
# The path of the log files (alias: log-path)
logpath "/var/log/yadifa"
# The location of the pid file (alias: pid-file)
pidfile "/var/run/yadifa/yadifad.pid"
# The path of the zone files (alias: data-path)
datapath "/var/lib/yadifa"
# The path of the DNSSEC keys (alias: keys-path)
keyspath "/var/lib/yadifa/keys"
# The path of the transfer and journaling files (AXFR & IXFR) (alias: xfr-path)
xfrpath "/var/lib/yadifa/xfr"
# A string returned by a query of hostname. CH TXT
# note: if you leave this out, the real hostname will be given back (alias: hostname-chaos)
hostname "server-yadifad"
# An ID returned by a query to id.server. CH TXT (alias: serverid-chaos)
serverid "yadifad-01"
# The version returned by a query to version.yadifa. CH TXT (alias: version-chaos)
version {3.0.2}
# Set the maximum UDP packet size.
# note: the packetsize cannot be less than 512 or more than 65535.
# Typical choice is 4096.
edns0-max-size 4096
# The maximum number of parallel TCP queries (max-tcp-connections)
max-tcp-queries 100
# The minimum data rate for a TCP query (in bytes per second)
tcp-query-min-rate 512
# The user id to use (alias: user)
uid yadifa
# The group id to use (alias: group)
gid yadifa
# The DNS port - any DNS query will use that port unless a specific value is used (alias: server-port)
port 53
# The interfaces to listen to.
listen 127.0.0.1, 192.0.2.2, 192.0.2.130 port 8053, 2001:db8::2
# Type of querylog to use
# 0: none
# 1: yadifa
# 2: bind
# 3: both yadifa and bind
queries-log-type 1
# Enable the collection and logging of statistics
statistics on
# Maximum number of seconds between two statistics lines
statistics-max-period 60
# Drop queries with erroneous content
#
# answer-formerr-packets on
answer-formerr-packets off
# Maximum number of records in an AXFR packet. Set to 1 for compatibility
# with very old name servers (alias: axfr-max-record-by-packet)
axfr-maxrecordbypacket 0
# Global Access Control rules
#
# Rules can be defined on network ranges, TSIG signatures, and ACL rules
# simple queries:
#
# allow-query any
allow-query !192.0.2.251,any
# dynamic update of a zone
#
# allow-update none
allow-update admins
# dynamic update of a secondary (forwarded to the primary)
#
# allow-update-forwarding none
allow-update-forwarding admins,key abroad-admin-key
# transfer of a zone (AXFR or IXFR)
#
# allow-transfer any
allow-transfer transferer
# notify of a change in the primary
#
# allow-notify any
allow-notify primary,admins
# If YADIFA has the controller enabled, allow control only for these
# clients (none by default)
allow-control controller
# overwrite the amount of CPUs detected by yadifad
cpu-count-override 3
# set the number of threads to serve queries
thread-count-by-address 2
```
- **\***
Key\
TSIG-key configuration\
- 1\.
Admin-key key definition (the name is arbitrary)
```
name abroad-admin-key
algorithm hmac-md5
secret WorthlessKeyForExample==
```
- 2\.
primary-secondary key definition (the name is arbitrary)
```
name primary-secondary
algorithm hmac-md5
secret PrimaryAndSecondaryKey==
```
- **\***
ACL\
Access Control List definitions\
- 1\.
primary-secondary key use
```
transferer key primary-secondary
admins 192.0.2.0/24, 2001:db8::74
primary 192.0.2.53
localhost 127.0.0.0/8, ::1
controller key controller # the ACL for the controller MUST use a key
```
- **\***
NSID\
DNS NameServer IDentifier\
- 1\.
Example with ascii
```
ascii belgium-brussels-01
```
- 2\.
Example with hex
```
hex 00320201
```
- **\***
RRL\
Response Rate Limiting
- 1\.
Example
```
# Number of identical responses per second before responses are being limited
responses-per-second 5
# Number of errors per second before responses are being limited
errors-per-second 5
# Random slip parameter
slip 10
# If enabled, the rate limits are only logged and not enforced
log-only off
# Mask applied to group the IPv4 clients
ipv4-prefix-length 24
# Mask applied to group the IPv6 clients
ipv6-prefix-length 56
# Rate limits are not subject to the following clients (aka whitelist)
exempt-clients none
# Enable or disable the rate limit capabilities
enabled yes
```
- **\***
Zone
- 1\.
Primary domain zone config
```
# This server is primary for the zone (mandatory)
type primary
# The domain name (mandatory)
domain mydomain.eu
# The zone file, relative to 'datapath' (mandatory for a primary) (alias: file-name)
file primaries/mydomain.eu
# List of servers also notified of a change (beside the ones in the zone file) (alias: notifies, notify)
also-notify 192.0.2.84, 192.0.2.149
# Set the size of the journal file in KB (alias: journal-size-kb)
journal-size 8192
# Allow dynupdate for these ACL entries
allow-update admins
# Allow AXFR/IXFR for these ACL entries
allow-transfer transferer
# Use DNSSEC policies otherwise remove or put in remark line below
dnssec-policy 1
```
- 2\.
Slave domain zone config
```
# This server is slave for that zone (mandatory)
type slave
# The domain name (mandatory)
domain myotherdomain.eu
# The address of the primary (mandatory for a secondary, forbidden for a primary) (alias: primary)
primaries 191.0.2.53 port 4053 key primary-secondary
# The zone file, relative to 'datapath'.
file slaves/myotherdomain.eu
# Accept notifes from these ACL entries
allow-notify primary
```
- **\***
DNSSEC-Policy
DNSSEC-Policy needs some extra sections: key-suite, key-roll, key-template (and denial if NSEC3 is configured)
- 1\.
dnssec-policy example with all the needed sections
example with NSEC3
```
id "1"
description "Example of ZSK and KSK"
denial "nsec3-with-salt-on"
key-suite "zsk-1024"
key-suite "ksk-2048"
```
example with NSEC
```
id "2"
description "Example of ZSK and KSK"
denial nsec
key-suite "zsk-1024"
key-suite "ksk-2048"
```
- 2\.
key-suite
```
id "ksk-2048"
key-template "ksk-2048"
key-roll "yearly-schedule"
id "zsk-1024"
key-template "zsk-1024"
key-roll "monthly-schedule"
```
- 3\.
key-roll
```
id "yearly-schedule"
generate 5 0 15 6 * * # this year (2018) 15/06 at 00:05
publish 10 0 15 6 * * # 00:10
activate 15 0 16 6 * * # 16/06 at 00:15
inactive 15 0 17 6 * * # (2019) 17/06 at 00:15
remove 15 11 18 6 * * # (2019) 18/06 at 11:15
id "monthly-schedule"
generate 5 0 * * tue 0 # 1 tuesday of the month at 00:05
publish 10 0 * * tue 0 # 00:10
activate 15 0 * * wed 0 # 1 wednesday of the month at 00:15
inactive 15 0 * * thu 0 # 1 thursday of the month at 00:15
remove 15 11 * * fri 0 # 1 friday of the month at 11:15
```
- 4\.
key-template
```
id "ksk-2048"
ksk true
algorithm 8
size 2048
id "zsk-1024"
ksk false
algorithm 8
size 1024
```
- 5\.
denial
```
id "nsec3-with-salt-on"
salt "ABCD"
algorithm 1
iterations 5
optout off
```
```
id "nsec3-with-salt-length-on"
salt-length 4
algorithm 1
iterations 5
optout off
```
- **\***
Channels
Logging output-channel configurations:
It contains a list of user-defined outputs for the logger.
The "name" is arbitrary and is used for identification in the \.\
The "stream-name" defines the output type (ie: a file name, a program output or syslog).\
The "arguments" are specific to the output type (ie: unix file access rights or syslog options and facilities).\
- 1\.
Example: YADIFA running as daemon channel definition.\
```
# name stream-name arguments
database database.log 0644
dnssec dnssec.log 0644
server server.log 0644
statistics statistics.log 0644
system system.log 0644
queries queries.log 0644
zone zone.log 0644
all all.log 0644
gziplog "|/usr/bin/gzip \- >> /var/log/yadifa.log.gz"
syslog syslog user
```
- 2\.
Example: YADIFA running in debug mode.\
This example shows the "stderr" and "stdout" which can also be used in the first example, but will output to the console.
```
# name stream-name arguments
syslog syslog user
stderr STDERR
stdout STDOUT
```
- **\***
Loggers
Logging input configurations:
The "bundle" is the name of the section of YADIDA being logged, sources are : database, dnssec, queries, server, stats, system, zone.\
The "debuglevel" uses the same names as syslog. \
Additionally, "\*" or "all" means all the levels; "prod" means all but the debug levels. \
The "channels" are a comma-separated list of channels.
- 1\.
Example without syslog
```
# bundle debuglevel channels
database ALL database,all
dnssec warning dnssec,all
server INFO,WARNING,ERR,CRIT,ALERT,EMERG server,all
stats prod statistics
system * system,all
queries * queries
zone * zone,all
```
- 2\.
Example with syslog
```
# bundle debuglevel channels
database ALL database,syslog
dnssec warning dnssec,syslog
server INFO,WARNING,ERR,CRIT,ALERT,EMERG server,syslog
stats prod statistics, syslog
system * system,syslog
queries * queries,syslog
zone * zone,syslog
```
## SEE ALSO
[*yadifad*(8)](/yadifad/8.md)
## NOTES
Since unquoted leading whitespace is generally ignored in the yadifad.conf you can indent everything to taste.
## CHANGES
Please check the file README from the sources.
## VERSION
Version: 3.0.2 of 2025-03-11.
## MAILING LISTS
There exists a mailinglist for questions relating to any program in the yadifa package:\
- **\***
**yadifa-users@mailinglists.yadifa.eu**\
for submitting questions/answers.
- **\***
**http://www.yadifa.eu/mailing-list-users**\
for subscription requests.
If you would like to stay informed about new versions and official patches send a subscription request to via:
- **\***
**http://www.yadifa.eu/mailing-list-announcements**
(this is a readonly list).
## LICENSE AND COPYRIGHT
- Copyright
(C)2011-2023", EURid\
B-1831 Diegem, Belgium\
**info@yadifa.eu**
## AUTHORS
Gery Van Emelen \
Email: **Gery.VanEmelen@EURid.eu**\
Eric Diaz Fernandez \
Email: **Eric.DiazFernandez@EURid.eu**
WWW: **http://www.EURid.eu**