Hi @Ettery  Can you try to add those properties in nifi.properties? the Docker configuration has been updated to allow proxy whitelisting from the run command the host header protection is only enforced on "secured" NiFi instances. This should make it much easier for users to quickly deploy sandbox environments like you are doing in this case Even you can try with: -e NIFI_WEB_HTTP_HOST=<host>  in docker run command   docker run --name nifi -p 9090:9090 -d -e NIFI_WEB_HTTP_PORT='9090' -e NIFI_WEB_HTTP_HOST=<host> apache/nifi:latest   In GitHub example configuration and documentation for NiFi running behind a reverse proxy that you may be interested in. For more detail refer stackoverflow1 and stackoverflow2 ... View more