No answer from traefik with specific cipher suite

Traefik Traefik v2 (latest)
1

I am trying to validate two ciphersuite on an old device.

TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256

Traefik handles the second one perfectly and answers the request but it does not for the first one.
This cipher suite is the isssue then : TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256

Wireshark :

image
image1292×110 7.49 KB

The very simple configuration :

[api]
  debug = true
  insecure = true
  
  [log]
  level = "DEBUG"
  
  [accessLog]
filePath="access.log"
format="json"

[providers]
[providers.file]
directory = "."

[entryPoints]
  [entryPoints.web]
    address = ":8090"
  [entryPoints.websecure]
    address = ":8091"


[http]
[http.routers]
  [http.routers.router0]
    entryPoints = ["websecure"]
    rule = "PathPrefix(`/`)"
    service = "my-service"
	[http.routers.router0.tls]
		options = "myTLSOptions"
	
	
[http.services]
[http.services.my-service]
	[http.services.my-service.loadBalancer]
	  [[http.services.my-service.loadBalancer.servers]]
		url = "http://192.168.1.17:8088"
	
	
[tls.stores]
  [tls.stores.default]
    [tls.stores.default.defaultCertificate]
      certFile = "ca.crt"
	  keyFile = "ca.key"
	
	[[tls.certificates]]
	  certFile = "ca.crt"
	  keyFile = "ca.key"

	[tls.options]
	  [tls.options.myTLSOptions]
		minVersion = "VersionTLS12"
		cipherSuites = [
		  "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256",
		  #"TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256"
		]

The certificate is a self signed certificate with the key type prime256v1.

There is no error in the log or in the access log.

Is there anything I am doing wrong ?

2

Maybe check the Traefik Github issues, there are some (closed) ones with TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256.

3

I did not find anything related to my issue.