Specify SSL settings
editSpecify SSL settings
editYou can specify SSL options when you configure:
- outputs that support SSL
- the Kibana endpoint
- Heartbeat monitors that support SSL
Example output config with SSL enabled:
output.elasticsearch.hosts: ["https://192.168.1.42:9200"] output.elasticsearch.ssl.certificate_authorities: ["/etc/pki/root/ca.pem"] output.elasticsearch.ssl.certificate: "/etc/pki/client/cert.pem" output.elasticsearch.ssl.key: "/etc/pki/client/cert.key"
Also see Secure communication with Logstash.
Example Kibana endpoint config with SSL enabled:
setup.kibana.host: "https://192.0.2.255:5601" setup.kibana.ssl.enabled: true setup.kibana.ssl.certificate_authorities: ["/etc/pki/root/ca.pem"] setup.kibana.ssl.certificate: "/etc/pki/client/cert.pem" setup.kibana.ssl.key: "/etc/pki/client/cert.key"
Example monitor with SSL enabled:
heartbeat.monitors: - type: tcp schedule: '@every 5s' hosts: ["myhost"] ports: [80, 9200, 5044] ssl: certificate_authorities: ['/etc/ca.crt'] supported_protocols: ["TLSv1.0", "TLSv1.1", "TLSv1.2"]
Configuration options
editYou can specify the following options in the ssl
section of the heartbeat.yml
config file:
enabled
editThe enabled
setting can be used to disable the ssl configuration by setting
it to false
. The default value is true
.
SSL settings are disabled if either enabled
is set to false
or the
ssl
section is missing.
certificate_authorities
editThe list of root certificates for server verifications. If certificate_authorities
is empty or not set, the trusted certificate authorities of the host system are used.
certificate: "/etc/pki/client/cert.pem"
editThe path to the certificate for SSL client authentication. If the certificate is not specified, client authentication is not available. The connection might fail if the server requests client authentication. If the SSL server does not require client authentication, the certificate will be loaded, but not requested or used by the server.
When this option is configured, the key
option is also required.
key: "/etc/pki/client/cert.key"
editThe client certificate key used for client authentication. This option is required if certificate
is specified.
key_passphrase
editThe passphrase used to decrypt an encrypted key stored in the configured key
file.
supported_protocols
editList of allowed SSL/TLS versions. If SSL/TLS server decides for protocol versions
not configured, the connection will be dropped during or after the handshake. The
setting is a list of allowed protocol versions:
SSLv3
, TLSv1
for TLS version 1.0, TLSv1.0
, TLSv1.1
and TLSv1.2
.
The default value is [TLSv1.1, TLSv1.2]
.
verification_mode
editThis option controls whether the client verifies server certificates and host
names. Valid values are none
and full
. If verification_mode
is set
to none
, all server host names and certificates are accepted. In this mode,
TLS-based connections are susceptible to man-in-the-middle attacks. Use this
option for testing only.
The default is full
.
cipher_suites
editThe list of cipher suites to use. The first entry has the highest priority. If this option is omitted, the Go crypto library’s default suites are used (recommended).
The following cipher suites are available:
- ECDHE-ECDSA-AES-128-CBC-SHA
- ECDHE-ECDSA-AES-128-CBC-SHA256 (TLS 1.2 only, disabled by default)
- ECDHE-ECDSA-AES-128-GCM-SHA256 (TLS 1.2 only)
- ECDHE-ECDSA-AES-256-CBC-SHA
- ECDHE-ECDSA-AES-256-GCM-SHA384 (TLS 1.2 only)
- ECDHE-ECDSA-CHACHA20-POLY1305 (TLS 1.2 only)
- ECDHE-ECDSA-RC4-128-SHA (disabled by default - RC4 not recommended)
- ECDHE-RSA-3DES-CBC3-SHA
- ECDHE-RSA-AES-128-CBC-SHA
- ECDHE-RSA-AES-128-CBC-SHA256 (TLS 1.2 only, disabled by default)
- ECDHE-RSA-AES-128-GCM-SHA256 (TLS 1.2 only)
- ECDHE-RSA-AES-256-CBC-SHA
- ECDHE-RSA-AES-256-GCM-SHA384 (TLS 1.2 only)
- ECDHE-RSA-CHACHA20-POLY1205 (TLS 1.2 only)
- ECDHE-RSA-RC4-128-SHA (disabled by default- RC4 not recommended)
- RSA-3DES-CBC3-SHA
- RSA-AES-128-CBC-SHA
- RSA-AES-128-CBC-SHA256 (TLS 1.2 only, disabled by default)
- RSA-AES-128-GCM-SHA256 (TLS 1.2 only)
- RSA-AES-256-CBC-SHA
- RSA-AES-256-GCM-SHA384 (TLS 1.2 only)
- RSA-RC4-128-SHA (disabled by default - RC4 not recommended)
Here is a list of acronyms used in defining the cipher suites:
- 3DES: Cipher suites using triple DES
- AES-128/256: Cipher suites using AES with 128/256-bit keys.
- CBC: Cipher using Cipher Block Chaining as block cipher mode.
- ECDHE: Cipher suites using Elliptic Curve Diffie-Hellman (DH) ephemeral key exchange.
- ECDSA: Cipher suites using Elliptic Curve Digital Signature Algorithm for authentication.
- GCM: Galois/Counter mode is used for symmetric key cryptography.
- RC4: Cipher suites using RC4.
- RSA: Cipher suites using RSA.
- SHA, SHA256, SHA384: Cipher suites using SHA-1, SHA-256 or SHA-384.
curve_types
editThe list of curve types for ECDHE (Elliptic Curve Diffie-Hellman ephemeral key exchange).
The following elliptic curve types are available:
- P-256
- P-384
- P-521
- X25519
renegotiation
editThis configures what types of TLS renegotiation are supported. The valid options
are never
, once
, and freely
. The default value is never.
-
never
- Disables renegotiation. -
once
- Allows a remote server to request renegotiation once per connection. -
freely
- Allows a remote server to repeatedly request renegotiation.