Traefik 3.0 show this red alert on every http router. What does it mean? The word “passthrough” does not appear in the 3.0 documentation.
It seems they are re-writing the docs, check this older version.
When TLS passthrough is enabled, the TLS-encrypted request is passed through by Traefik with encryption and your target service needs to be able to encrypt it.
False is the default, making it red ("alarm") kind of creates the wrong impression here.
This parameter has not only been deprecated in the documentation but also removed in the implementation:
{
"level":"error",
"providerName":"file",
"error":"/etc/config.yaml: field not found, node: passthrough"
}
Share your full Traefik static and dynamic config.
Maybe check migration doc.