Just for the record: This has been implemented with the feature/directive "proxy_requests" in the Stream module in Nginx version 1.15.7. Thanks a lot!by patrickb - Ideas and Feature Requests
Hello, we are using Nginx to load-balance UDP-based DNS queries to a number of upstream servers. The client side, which is not under our control, often uses fixed UDP source ports to avoid overloading stateful firewalls. Before version 1.15 of Nginx every query packet was usually forwarded to a different upstream, but with version 1.15 of Nginx this no longer seems to be possible because ofby patrickb - Ideas and Feature Requests