I want to enable HTTP Strict Transport Security (HSTS) Headers globally for all my backends in HAProxy v1.5.
Following the instructions from https://www.haproxy.com/blog/haproxy-and-http-strict-transport-security-hsts-header-in-http-redirects/ I can add the following line to a backend configuration file and it works as expected.
http-response set-header Strict-Transport-Security max-age=16000000;\ includeSubDomains;\ preload;
I have a dozen backend files and will likely have more in the future. I'd like to set this in one place.
I'd like something similar to how it's set up globally in Apache's
Header always set Strict-Transport-Security "max-age=63072000; includeSubdomains;"