Change the default value of insecureSNI
* fix: allow domain fronting by default * review: typo. * review: doc. Co-authored-by: Fernandez Ludovic <ludovic@containo.us>
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Jean-Baptiste Doumenjou
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@ -137,7 +137,7 @@ connection with a specific domain name, thanks to the
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[Server Name Indication](https://en.wikipedia.org/wiki/Server_Name_Indication), then access a service with another
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domain set in the HTTP `Host` header.
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Since the `v2.2.2`, Traefik avoids (by default) using domain fronting.
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Since the `v2.2.4`, Traefik has the option to avoid domain fronting thanks to the `insecureSNI` global flag.
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As it is valid for advanced use cases, the `HostHeader` and `HostSNI` [rules](../routing/routers/index.md#rule) allow
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to fine tune the routing with the `Server Name Indication` and `Host header` value.
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@ -4,114 +4,35 @@
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### Domain fronting
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In `v2.2.2` we introduced the ability to avoid [Domain fronting](https://en.wikipedia.org/wiki/Domain_fronting),
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and enabled it by default for [https routers](../routing/routers/index.md#rule) configured with ```Host(`something`)```.
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In `v2.2.2` we introduced the ability to avoid [Domain fronting](https://en.wikipedia.org/wiki/Domain_fronting) for [https routers](../routing/routers/index.md#rule) configured with ```Host(`something`)``` but we disabled it for compatibility reasons by default.
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!!! example "Allow Domain Fronting on a Specific Router"
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!!! info "Before v2.2.2"
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```yaml tab="Docker"
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labels:
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- "traefik.http.routers.router0.rule=Host(`test.localhost`)"
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```
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```yaml tab="K8s Ingress"
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apiVersion: traefik.containo.us/v1alpha1
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kind: IngressRoute
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metadata:
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name: ingressroutebar
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spec:
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entryPoints:
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- http
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routes:
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- match: Host(`test.localhost`)
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kind: Rule
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services:
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- name: server0
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port: 80
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- name: server1
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port: 80
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```
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```toml tab="File (TOML)"
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[http.routers.router0]
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rule = "Host(`test.localhost`)"
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service = "my-service"
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```
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```toml tab="File (YAML)"
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http:
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routers:
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router0:
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rule: "Host(`test.localhost`)"
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service: my-service
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```
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Nothing special is required to keep the previous behavior.
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!!! info "v2.2.2"
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```yaml tab="Docker"
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labels:
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- "traefik.http.routers.router0.rule=HostHeader(`test.localhost`)"
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```
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```yaml tab="K8s Ingress"
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apiVersion: traefik.containo.us/v1alpha1
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kind: IngressRoute
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metadata:
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name: ingressroutebar
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spec:
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entryPoints:
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- http
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routes:
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- match: HostHeader(`test.localhost`)
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kind: Rule
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services:
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- name: server0
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port: 80
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- name: server1
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port: 80
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```
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```toml tab="File (TOML)"
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[http.routers.router0]
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rule = "HostHeader(`test.localhost`)"
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service = "my-service"
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```
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```toml tab="File (YAML)"
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http:
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routers:
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router0:
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rule: "HostHeader(`test.localhost`)"
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service: my-service
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```
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However, a new flag is available as a global option to disable domain fronting.
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As a fallback, a new flag is available as a global option:
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!!! example "Enabling Domain Fronting for All Routers"
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!!! example "Disabling Domain Fronting for All Routers"
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```toml tab="File (TOML)"
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# Static configuration
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[global]
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# Enabling domain fronting
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insecureSNI = true
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# Disabling domain fronting
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insecureSNI = false
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```
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```yaml tab="File (YAML)"
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# Static configuration
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global:
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# Enabling domain fronting
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insecureSNI: true
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# Disabling domain fronting
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insecureSNI: false
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```
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```bash tab="CLI"
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# Enabling domain fronting
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--global.insecureSNI
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# Disabling domain fronting
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--global.insecureSNI=false
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```
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To fine tune the HTTPS routing with Domain Fronting disabled, two new HTTP rules `HostSNI` and `HostHeader` are available.
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## v2.0 to v2.1
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### Kubernetes CRD
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@ -163,7 +163,7 @@ WriteTimeout is the maximum duration before timing out writes of the response. I
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Periodically check if a new version has been released. (Default: ```false```)
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`--global.insecuresni`:
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Allow domain fronting. If the option is not specified, it will be disabled by default. (Default: ```false```)
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Allow domain fronting. If the option is not specified, it will be enabled by default. (Default: ```true```)
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`--global.sendanonymoususage`:
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Periodically send anonymous usage statistics. If the option is not specified, it will be enabled by default. (Default: ```false```)
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@ -163,7 +163,7 @@ WriteTimeout is the maximum duration before timing out writes of the response. I
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Periodically check if a new version has been released. (Default: ```false```)
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`TRAEFIK_GLOBAL_INSECURESNI`:
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Allow domain fronting. If the option is not specified, it will be disabled by default. (Default: ```false```)
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Allow domain fronting. If the option is not specified, it will be enabled by default. (Default: ```true```)
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`TRAEFIK_GLOBAL_SENDANONYMOUSUSAGE`:
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Periodically send anonymous usage statistics. If the option is not specified, it will be enabled by default. (Default: ```false```)
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@ -79,7 +79,12 @@ type CertificateResolver struct {
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type Global struct {
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CheckNewVersion bool `description:"Periodically check if a new version has been released." json:"checkNewVersion,omitempty" toml:"checkNewVersion,omitempty" yaml:"checkNewVersion,omitempty" label:"allowEmpty" export:"true"`
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SendAnonymousUsage bool `description:"Periodically send anonymous usage statistics. If the option is not specified, it will be enabled by default." json:"sendAnonymousUsage,omitempty" toml:"sendAnonymousUsage,omitempty" yaml:"sendAnonymousUsage,omitempty" label:"allowEmpty" export:"true"`
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InsecureSNI bool `description:"Allow domain fronting. If the option is not specified, it will be disabled by default." json:"insecureSNI,omitempty" toml:"insecureSNI,omitempty" yaml:"insecureSNI,omitempty" label:"allowEmpty" export:"true"`
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InsecureSNI bool `description:"Allow domain fronting. If the option is not specified, it will be enabled by default." json:"insecureSNI,omitempty" toml:"insecureSNI,omitempty" yaml:"insecureSNI,omitempty" label:"allowEmpty" export:"true"`
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}
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// SetDefaults sets the default values.
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func (a *Global) SetDefaults() {
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a.InsecureSNI = true
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}
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// ServersTransport options to configure communication between Traefik and the servers.
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