Host should be $proxy_host, not $host #3247
Open
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
$host is the Host sent by the user's browser. This is the correct setting if the service has built-in support for being proxied.
$proxy_host is the Host as if the browser would run on the proxy. This is the correct setting if the service does not have built-in support for reverse proxies. It is also the nginx default.
In nginx, you cannot unset the Host header. Configuring headers multiple times just sends multiple values with the http request. So there is no way to "fix" the Host by adding a custom header if it is already set.
For these reasons, Host should not be set (and default to $proxy_host). In the unlikely case that your service needs something else you can then just set a custom Host header in the GUI.
Fixes #2675