dnssec-keygen(1M)

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Dnssec-keygen generates keys for DNSSEC (Secure DNS), as defined in RFC 2535 and RFC 4034. It can also generate keys for use with TSIG (Transaction Signatures) as. Failing to do so will cause your server to become part of large scale DNS amplification attacks. Implementing BCP38 within your network would greatly reduce such attack surface./ recursion yes; /. DNSSEC related options.

Name

dnssec-keygen– DNSSEC key generation tool

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Synopsis

Description

The dnssec-keygen utility generates keys for DNSSEC (Secure DNS), as defined in RFC 2535 and RFC 4034. It can also generate keys for use with TSIG (Transaction Signatures), as defined in RFC 2845.

Options

Use Usr Sbin Dnssec Keygen To Generate Tsig Keys 2016

The following options are supported:

-aalgorithm

Select the cryptographic algorithm. The value of algorithm must be one of RSAMD5 (RSA) or RSASHA1, DSA, NSEC3RSASHA1, NSEC3DSA, DH (Diffie-Hellman), or HMAC-MD5. These values are case insensitive.

For DNSSEC, RSASHA1 is a mandatory-to-implement algorithm and DSA is recommended. For TSIG, HMAC-MD5 is mandatory.

Note –

HMAC-MD5 and DH automatically set the -k flag.

-bkeysize

Specify the number of bits in the key. The choice of key size depends on the algorithm used. RSAMD5 and RSASHA1 keys must be between 512 and 2048 bits. Diffie-Hellman keys must be between 128 and 4096 bits. DSA keys must be between 512 and 1024 bits and an exact multiple of 64.HMAC-MD5 keys must be between 1 and 512 bits.

-cclass

Indicate that the DNS record containing the key should have the specified class. If not specified, class IN is used.

-e

Use a large exponent if generating an RSAMD5 or RSASHA1 key.

-fflag

Set the specified flag in the flag field of the KEY/DNSKEY record. The only recognized flag is KSK (Key Signing Key) DNSKEY.

-ggenerator

Use this generator if generating a Diffie Hellman key. Allowed values are 2 and 5. If no generator is specified, a known prime from RFC 2539 will be used if possible; otherwise the default is 2.

-h

Print a short summary of the options and arguments to dnssec-keygen.

-k

Generate KEY records rather than DNSKEY records.

-nnametype

Specify the owner type of the key. The value of nametype must either be ZONE (for a DNSSEC zone key (KEY/DNSKEY)), HOST or ENTITY (for a key associated with a host (KEY)), USER (for a key associatedwith a user(KEY)), or OTHER (DNSKEY). These values are case insensitive. Defaults to ZONE for DNSKEY generation.

-pprotocol

Set the protocol value for the generated key. The protocol argument is a number between 0 and 255. The default is 3 (DNSSEC) Other possible values for this argument are listed in RFC 2535 and its successors.

-rrandomdev

Specify the source of randomness. If the operating system does not provide a /dev/random or equivalent device, the default source of randomness is keyboard input. randomdev specifies the name of a character device or file containingrandom data to be used instead of the default. The special value “keyboard” indicates that keyboard input should be used.

-sstrength

Specify the strength value of the key. The strength argument is a number between 0 and 15, and currently has no defined purpose in DNSSEC.

-ttype

Indicate the use of the key. type must be one of AUTHCONF, NOAUTHCONF, NOAUTH, or NOCONF. The default is AUTHCONF. AUTH refers to the ability toauthenticate data, and CONF the ability to encrypt data.

-vlevel

Set the debugging level.

GENERATED KEYS

When dnssec-keygen completes successfully, it prints a string of the form Knnnn.+aaa+iiiii to the standard output. This is an identification string for the key it has generated.

nnnn is the key name.
aaa is the numeric representation of the algorithm.
iiiii is the key identifier (or footprint).

The dnssec-keygen utility creates two files, with names based on the printed string.

Knnnn.+aaa+iiiii.key contains the public key.
Knnnn.+aaa+iiiii.private contains the private key.

The .key file contains a DNS KEY record that can be inserted into a zone file (directly or with a $INCLUDE statement).

The .private file contains algorithm specific fields. For obvious security reasons, this file does not have general read permission.

Both .key and .private files are generated for symmetric encryption algorithm such as HMAC-MD5, even though the public and private key are equivalent.

Examples

Example 1 Generating a 768-bit DSA Key

To generate a 768-bit DSA key for the domain example.com, the following command would be issued:

The command would print a string of the form:

The following files would be created:

Use Usr Sbin Dnssec Keygen To Generate Tsig Keys On Mac

Attributes

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Availability	service/network/dns/bind
Interface Stability	Volatile

Use Usr Sbin Dnssec Keygen To Generate Tsig Keys 2016

Use Usr Sbin Dnssec Keygen To Generate Tsig Keys Free

dnssec-keygen(1M)

Name

Use Usr Sbin Dnssec Keygen To Generate Tsig Keys On Iphone

Synopsis

Description

Options

Use Usr Sbin Dnssec Keygen To Generate Tsig Keys 2016

GENERATED KEYS

Examples

Example 1 Generating a 768-bit DSA Key

Use Usr Sbin Dnssec Keygen To Generate Tsig Keys On Mac

Attributes

Use Usr Sbin Dnssec Keygen To Generate Tsig Keys 2016

See Also

Use Usr Sbin Dnssec Keygen To Generate Tsig Keys Free