caddy-website/src/docs/markdown/caddyfile/directives/abort.md

---
title: abort (Caddyfile directive)
---

# abort

Prevents any response to the client by immediately aborting the HTTP handler chain and closing the connection. Any concurrent, active HTTP streams on the same connection are interrupted.


## Syntax

```caddy-d
abort [<matcher>]
```

## Examples

Forcefully close a connection received for unknown domains when using a wildcard certificate:

```caddy
*.example.com {
    @foo host foo.example.com
    handle @foo {
        respond "This is foo!" 200
    }

    # Unhandled domains fall through to here, but we don't want to accept their requests
    handle {
        abort
    }
}
```
docs: Various updates for 2.3, 2.4 beta, and Go 1.16 Steps on #139 (sorry) 2021-02-17 11:34:28 -07:00			`---`
			`title: abort (Caddyfile directive)`
			`---`

			`# abort`

			`Prevents any response to the client by immediately aborting the HTTP handler chain and closing the connection. Any concurrent, active HTTP streams on the same connection are interrupted.`


			`## Syntax`

			```caddy-d
			`abort [<matcher>]`
			```

			`## Examples`

docs: Some cleanup, some v2.4.0 additions (#139) * docs: Some cleanup, some v2.4.0 additions - Add `abort` directive docs - Add a note in `handle` to cross-link to `handle_path` - Add another example in `handle_errors` that shows how an `expression` matcher can be used to pair with it - Add a cat emoji to handle_errors because 😸 - Add `file_server` to one of the `php_fastcgi` examples, it's rare that you'll ever use it without `file_server` so might as well include it there - Add a TOC to `reverse_proxy` cause it's such a long page. Maybe we'll add one to other pages as well, but TBD - Clarify the upstream address stuff a bit after some discussion in https://caddy.community/t/reverse-proxy-with-multiple-different-upstreams-with-paths/11512/12 and mention `rewrite` as the alternative - Use the `{re..}` shortcut in the Caddyfile matcher docs, links to the placeholder mapping to let people trace where that comes from * docs: Revise the `handle` cross-linking, add another example * docs: Bump minimum Go version to 1.15 * docs: A bunch more additions since v2.3.0 I went through the whole list of commits here: https://github.com/caddyserver/caddy/compare/v2.3.0...ec3ac84 * docs: Review feedback * docs: Link to https://golang.org/doc/install, better instructions 2021-02-22 15:11:21 -05:00			`Forcefully close a connection received for unknown domains when using a wildcard certificate:`

			```caddy
			`*.example.com {`
			`@foo host foo.example.com`
			`handle @foo {`
			`respond "This is foo!" 200`
			`}`

			`# Unhandled domains fall through to here, but we don't want to accept their requests`
			`handle {`
			`abort`
			`}`
			`}`
			```