SQL Authentication

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CockroachDB allows fine-grained configuration of which database connect attempts it allows to proceed to the authentication stage, and which authentication methods it will accept, based on:

• Who is making the attempt (SQL user).
• Where on the internet (IP Address) the attempt is coming from.

Currently supported authentication methods

All options also support the following no-op 'authentication methods' (authentication is not actually performed):

• reject: unconditionally rejects the connection attempt.
• trust: unconditionally rejects the connection attempt.

Authentication configuration

CockroachDB's authentication behavior is configured using a domain-specific language (DSL), shared with PostgreSQL, called host-based authentication (HBA).

A specific CockroachDB cluster's authentication behavior is configured by setting its server.host_based_authentication.configuration cluster setting, using the SET CLUSTER SETTING statement, which accepts a single text field that must be a correctly formatted HBA manifest. Inspect the current setting with SHOW CLUSTER SETTING.

HBA configuration syntax

Each line of an Authentication Configuration (HBA) manifest defines a rule. Lines commented with # are ignored.

For example, the following silly but easy-to-understand configuration has three rules:

• The first allows the CEO to connect to the database from their house without even using a password (they fired everyone who told them this was a bad idea).
• The second rule ensures that a known saboteur cannot even attempt to authenticate with the database from anywhere.
• The third rule allows all other users to authenticate using a password.

 # TYPE    DATABASE      USER           ADDRESS             METHOD
   host    all           ceo            555.123.456.789/32  trust
   host    all           saboteur       all                 reject
   host    all           all            all                 password

Each rule definition contains up to 6 values.

1. Each line must begin with a connection TYPE. CockroachDB currently supports two connection types:
   1. local
   2. host (any remote host)
2. DATABASE, which defines the name of the database(s) to which the rule will apply. Currently, CockroachDB only supports cluster-wide rules, so the value in this column must be all.
3. USER, which defines the username to which the rule applies. CockroachDB requires all connection requests to include a username. If the presented username exists in the system.users table and has the LOGIN option enabled, CockroachDB will check the authentication configuration to find an allowed method by which the user may authenticate. This parameter can also take the value all, in which case it will match all users.
4. ADDRESS specifies the IP range which the rule will allow or block, either with the keyword "all", or with a valid IP address. The IP address can include an IP mask (the value of the field can be of the format XXX.XXX.XXX.XXX/X), or not, in which case the next value must be the mask (the value of this field will be of the form XXX.XXX.XXX.XXX, in which case the next field must be a valid IP mask).
5. IP MASK (unless the Address in the prior field included or did not require an IP mask).
6. Authentication METHOD by which specified user(s) may authenticate from specified addresses.
   • password
   • cert
   • cert-password
   • gss
   • reject
   • trust

Default behavior

CockroachDB Serverless

The default authentication configuration for CockroachDB Serverless clusters is equivalent to the following configuration:

 # TYPE    DATABASE      USER        ADDRESS       METHOD
   host    all           all         all           password

This is convenient for quick usage and experimentation, but is not suitable for clusters containing valuable data. It is a best practice to configure SQL authentication for hardened CockroachDB Serverless cluster security.

CockroachDB Dedicated

CockroachDB Dedicated clusters enforce IP allow-listing, which must be configured through the CockroachDB Cloud Console.

See Managing Network Authorization for CockroachDB Dedicated.

CockroachDB Self-Hosted

CockroachDB Self-Hosted deploys with the following default HBA configuration:

# TYPE    DATABASE      USER        ADDRESS        METHOD
  host    all           root        all            cert-password
  host    all           all         all            cert-password
  local   all           all                        password

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