In k3s how to whitelist specific namespaces to work with traefik?

[SpiderUnderUrBed]

In k3s how to whitelist specific namespaces to work with traefik? There is an allowCrossNamespace option for traefik, somewhere, helm or just in its plain setup, and I had to have enabled it because there was the UI for one of my services in a different namespace (longhorn), but I dont like the idea of it being open for all namespaces, also that might get messy with multiple ingresses for the future, so is there a way to whitelist specific namepsaces to work cross-namespace?

[brandond]

This is not the Traefik project. Please read Traefik docs or ask at https://github.com/traefik/traefik