401 lines
8.9 KiB
Markdown
401 lines
8.9 KiB
Markdown
# TLS
|
|
|
|
Transport Layer Security
|
|
{: .subtitle }
|
|
|
|
## Certificates Definition
|
|
|
|
### Automated
|
|
|
|
See the [Let's Encrypt](./acme.md) page.
|
|
|
|
### User defined
|
|
|
|
To add / remove TLS certificates, even when Traefik is already running, their definition can be added to the [dynamic configuration](../getting-started/configuration-overview.md), in the `[[tls.certificates]]` section:
|
|
|
|
```toml tab="File (TOML)"
|
|
# Dynamic configuration
|
|
|
|
[[tls.certificates]]
|
|
certFile = "/path/to/domain.cert"
|
|
keyFile = "/path/to/domain.key"
|
|
|
|
[[tls.certificates]]
|
|
certFile = "/path/to/other-domain.cert"
|
|
keyFile = "/path/to/other-domain.key"
|
|
```
|
|
|
|
```yaml tab="File (YAML)"
|
|
# Dynamic configuration
|
|
|
|
tls:
|
|
certificates:
|
|
- certFile: /path/to/domain.cert
|
|
keyFile: /path/to/domain.key
|
|
- certFile: /path/to/other-domain.cert
|
|
keyFile: /path/to/other-domain.key
|
|
```
|
|
|
|
!!! important "Restriction"
|
|
|
|
In the above example, we've used the [file provider](../providers/file.md) to handle these definitions.
|
|
It is the only available method to configure the certificates (as well as the options and the stores).
|
|
However, in [Kubernetes](../providers/kubernetes-crd.md), the certificates can and must be provided by [secrets](https://kubernetes.io/docs/concepts/configuration/secret/).
|
|
|
|
## Certificates Stores
|
|
|
|
In Traefik, certificates are grouped together in certificates stores, which are defined as such:
|
|
|
|
```toml tab="File (TOML)"
|
|
# Dynamic configuration
|
|
|
|
[tls.stores]
|
|
[tls.stores.default]
|
|
```
|
|
|
|
```yaml tab="File (YAML)"
|
|
# Dynamic configuration
|
|
|
|
tls:
|
|
stores:
|
|
default: {}
|
|
```
|
|
|
|
!!! important "Restriction"
|
|
|
|
Any store definition other than the default one (named `default`) will be ignored,
|
|
and there is thefore only one globally available TLS store.
|
|
|
|
In the `tls.certificates` section, a list of stores can then be specified to indicate where the certificates should be stored:
|
|
|
|
```toml tab="File (TOML)"
|
|
# Dynamic configuration
|
|
|
|
[[tls.certificates]]
|
|
certFile = "/path/to/domain.cert"
|
|
keyFile = "/path/to/domain.key"
|
|
stores = ["default"]
|
|
|
|
[[tls.certificates]]
|
|
# Note that since no store is defined,
|
|
# the certificate below will be stored in the `default` store.
|
|
certFile = "/path/to/other-domain.cert"
|
|
keyFile = "/path/to/other-domain.key"
|
|
```
|
|
|
|
```yaml tab="File (YAML)"
|
|
# Dynamic configuration
|
|
|
|
tls:
|
|
certificates:
|
|
- certFile: /path/to/domain.cert
|
|
keyFile: /path/to/domain.key
|
|
stores:
|
|
- default
|
|
# Note that since no store is defined,
|
|
# the certificate below will be stored in the `default` store.
|
|
- certFile: /path/to/other-domain.cert
|
|
keyFile: /path/to/other-domain.key
|
|
```
|
|
|
|
!!! important "Restriction"
|
|
|
|
The `stores` list will actually be ignored and automatically set to `["default"]`.
|
|
|
|
### Default Certificate
|
|
|
|
Traefik can use a default certificate for connections without a SNI, or without a matching domain.
|
|
This default certificate should be defined in a TLS store:
|
|
|
|
```toml tab="File (TOML)"
|
|
# Dynamic configuration
|
|
|
|
[tls.stores]
|
|
[tls.stores.default]
|
|
[tls.stores.default.defaultCertificate]
|
|
certFile = "path/to/cert.crt"
|
|
keyFile = "path/to/cert.key"
|
|
```
|
|
|
|
```yaml tab="File (YAML)"
|
|
# Dynamic configuration
|
|
|
|
tls:
|
|
stores:
|
|
default:
|
|
defaultCertificate:
|
|
certFile: path/to/cert.crt
|
|
keyFile: path/to/cert.key
|
|
```
|
|
|
|
If no default certificate is provided, Traefik generates and uses a self-signed certificate.
|
|
|
|
## TLS Options
|
|
|
|
The TLS options allow one to configure some parameters of the TLS connection.
|
|
|
|
### Minimum TLS Version
|
|
|
|
```toml tab="File (TOML)"
|
|
# Dynamic configuration
|
|
|
|
[tls.options]
|
|
|
|
[tls.options.default]
|
|
minVersion = "VersionTLS12"
|
|
|
|
[tls.options.mintls13]
|
|
minVersion = "VersionTLS13"
|
|
```
|
|
|
|
```yaml tab="File (YAML)"
|
|
# Dynamic configuration
|
|
|
|
tls:
|
|
options:
|
|
default:
|
|
minVersion: VersionTLS12
|
|
|
|
mintls13:
|
|
minVersion: VersionTLS13
|
|
```
|
|
|
|
```yaml tab="Kubernetes"
|
|
apiVersion: traefik.containo.us/v1alpha1
|
|
kind: TLSOption
|
|
metadata:
|
|
name: default
|
|
namespace: default
|
|
|
|
spec:
|
|
minVersion: VersionTLS12
|
|
|
|
---
|
|
apiVersion: traefik.containo.us/v1alpha1
|
|
kind: TLSOption
|
|
metadata:
|
|
name: mintls13
|
|
namespace: default
|
|
|
|
spec:
|
|
minVersion: VersionTLS13
|
|
```
|
|
|
|
### Maximum TLS Version
|
|
|
|
We discourages the use of this setting to disable TLS1.3.
|
|
|
|
The right approach is to update the clients to support TLS1.3.
|
|
|
|
```toml tab="File (TOML)"
|
|
# Dynamic configuration
|
|
|
|
[tls.options]
|
|
|
|
[tls.options.default]
|
|
maxVersion = "VersionTLS13"
|
|
|
|
[tls.options.maxtls12]
|
|
maxVersion = "VersionTLS12"
|
|
```
|
|
|
|
```yaml tab="File (YAML)"
|
|
# Dynamic configuration
|
|
|
|
tls:
|
|
options:
|
|
default:
|
|
maxVersion: VersionTLS13
|
|
|
|
maxtls12:
|
|
maxVersion: VersionTLS12
|
|
```
|
|
|
|
```yaml tab="Kubernetes"
|
|
apiVersion: traefik.containo.us/v1alpha1
|
|
kind: TLSOption
|
|
metadata:
|
|
name: default
|
|
namespace: default
|
|
|
|
spec:
|
|
maxVersion: VersionTLS13
|
|
|
|
---
|
|
apiVersion: traefik.containo.us/v1alpha1
|
|
kind: TLSOption
|
|
metadata:
|
|
name: maxtls12
|
|
namespace: default
|
|
|
|
spec:
|
|
maxVersion: VersionTLS12
|
|
```
|
|
|
|
### Cipher Suites
|
|
|
|
See [cipherSuites](https://godoc.org/crypto/tls#pkg-constants) for more information.
|
|
|
|
```toml tab="File (TOML)"
|
|
# Dynamic configuration
|
|
|
|
[tls.options]
|
|
[tls.options.default]
|
|
cipherSuites = [
|
|
"TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256"
|
|
]
|
|
```
|
|
|
|
```yaml tab="File (YAML)"
|
|
# Dynamic configuration
|
|
|
|
tls:
|
|
options:
|
|
default:
|
|
cipherSuites:
|
|
- TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
|
|
```
|
|
|
|
```yaml tab="Kubernetes"
|
|
apiVersion: traefik.containo.us/v1alpha1
|
|
kind: TLSOption
|
|
metadata:
|
|
name: default
|
|
namespace: default
|
|
|
|
spec:
|
|
cipherSuites:
|
|
- TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
|
|
```
|
|
|
|
!!! important "TLS 1.3"
|
|
|
|
Cipher suites defined for TLS 1.2 and below cannot be used in TLS 1.3, and vice versa. (<https://tools.ietf.org/html/rfc8446>)
|
|
With TLS 1.3, the cipher suites are not configurable (all supported cipher suites are safe in this case).
|
|
<https://golang.org/doc/go1.12#tls_1_3>
|
|
|
|
### Curve Preferences
|
|
|
|
This option allows to set the preferred elliptic curves in a specific order.
|
|
|
|
The names of the curves defined by [`crypto`](https://godoc.org/crypto/tls#CurveID) (e.g. `CurveP521`) and the [RFC defined names](https://tools.ietf.org/html/rfc8446#section-4.2.7) (e. g. `secp521r1`) can be used.
|
|
|
|
See [CurveID](https://godoc.org/crypto/tls#CurveID) for more information.
|
|
|
|
```toml tab="File (TOML)"
|
|
# Dynamic configuration
|
|
|
|
[tls.options]
|
|
[tls.options.default]
|
|
curvePreferences = ["CurveP521", "CurveP384"]
|
|
```
|
|
|
|
```yaml tab="File (YAML)"
|
|
# Dynamic configuration
|
|
|
|
tls:
|
|
options:
|
|
default:
|
|
curvePreferences:
|
|
- CurveP521
|
|
- CurveP384
|
|
```
|
|
|
|
```yaml tab="Kubernetes"
|
|
apiVersion: traefik.containo.us/v1alpha1
|
|
kind: TLSOption
|
|
metadata:
|
|
name: default
|
|
namespace: default
|
|
|
|
spec:
|
|
curvePreferences:
|
|
- CurveP521
|
|
- CurveP384
|
|
```
|
|
|
|
### Strict SNI Checking
|
|
|
|
With strict SNI checking, Traefik won't allow connections from clients connections
|
|
that do not specify a server_name extension.
|
|
|
|
```toml tab="File (TOML)"
|
|
# Dynamic configuration
|
|
|
|
[tls.options]
|
|
[tls.options.default]
|
|
sniStrict = true
|
|
```
|
|
|
|
```yaml tab="File (YAML)"
|
|
# Dynamic configuration
|
|
|
|
tls:
|
|
options:
|
|
default:
|
|
sniStrict: true
|
|
```
|
|
|
|
```yaml tab="Kubernetes"
|
|
apiVersion: traefik.containo.us/v1alpha1
|
|
kind: TLSOption
|
|
metadata:
|
|
name: default
|
|
namespace: default
|
|
|
|
spec:
|
|
sniStrict: true
|
|
```
|
|
|
|
### Client Authentication (mTLS)
|
|
|
|
Traefik supports mutual authentication, through the `clientAuth` section.
|
|
|
|
For authentication policies that require verification of the client certificate, the certificate authority for the certificate should be set in `clientAuth.caFiles`.
|
|
|
|
The `clientAuth.clientAuthType` option governs the behaviour as follows:
|
|
|
|
- `NoClientCert`: disregards any client certificate.
|
|
- `RequestClientCert`: asks for a certificate but proceeds anyway if none is provided.
|
|
- `RequireAnyClientCert`: requires a certificate but does not verify if it is signed by a CA listed in `clientAuth.caFiles`.
|
|
- `VerifyClientCertIfGiven`: if a certificate is provided, verifies if it is signed by a CA listed in `clientAuth.caFiles`. Otherwise proceeds without any certificate.
|
|
- `RequireAndVerifyClientCert`: requires a certificate, which must be signed by a CA listed in `clientAuth.caFiles`.
|
|
|
|
```toml tab="File (TOML)"
|
|
# Dynamic configuration
|
|
|
|
[tls.options]
|
|
[tls.options.default]
|
|
[tls.options.default.clientAuth]
|
|
# in PEM format. each file can contain multiple CAs.
|
|
caFiles = ["tests/clientca1.crt", "tests/clientca2.crt"]
|
|
clientAuthType = "RequireAndVerifyClientCert"
|
|
```
|
|
|
|
```yaml tab="File (YAML)"
|
|
# Dynamic configuration
|
|
|
|
tls:
|
|
options:
|
|
default:
|
|
clientAuth:
|
|
# in PEM format. each file can contain multiple CAs.
|
|
caFiles:
|
|
- tests/clientca1.crt
|
|
- tests/clientca2.crt
|
|
clientAuthType: RequireAndVerifyClientCert
|
|
```
|
|
|
|
```yaml tab="Kubernetes"
|
|
apiVersion: traefik.containo.us/v1alpha1
|
|
kind: TLSOption
|
|
metadata:
|
|
name: default
|
|
namespace: default
|
|
|
|
spec:
|
|
clientAuth:
|
|
secretNames:
|
|
- secretCA
|
|
clientAuthType: RequireAndVerifyClientCert
|
|
```
|