///

### Enable Proxy Forwarded Headers { #enable-proxy-forwarded-headers }

You can start FastAPI CLI with the *CLI Option* `--forwarded-allow-ips` and pass the IP addresses that should be trusted to read those forwarded headers.

If you set it to `--forwarded-allow-ips="*"` it would trust all the incoming IPs.

If your **server** is behind a trusted **proxy** and only the proxy talks to it, this would make it accept whatever is the IP of that **proxy**.

For example, if the **application server** is only receiving communication from the trusted **proxy**, you can set it to `--forwarded-allow-ips="*"` to make it trust all incoming IPs, as it will only receive requests from whatever is the IP used by the **proxy**.

	}
}

func TestCreateEndpoints(t *testing.T) {
	tempGlobalMinioPort := globalMinioPort
	defer func() {
		globalMinioPort = tempGlobalMinioPort
	}()
	globalMinioPort = "9000"

	// Filter ipList by IPs those do not start with '127.'.
	nonLoopBackIPs := localIP4.FuncMatch(func(ip string, matchString string) bool {
		return !net.ParseIP(ip).IsLoopback()
	}, "")
	if len(nonLoopBackIPs) == 0 {

		}
	}
}

func TestSortIPs(t *testing.T) {
	testCases := []struct {
		ipList       []string
		sortedIPList []string
	}{
		// Default case of two ips one with higher octet moves
		// to the beginning of the list.
		{
			ipList:       []string{"127.0.0.1", "10.0.0.13"},
			sortedIPList: []string{"10.0.0.13", "127.0.0.1"},
		},

///

## Deployment Concepts { #deployment-concepts }

These examples run the server program (e.g Uvicorn), starting **a single process**, listening on all the IPs (`0.0.0.0`) on a predefined port (e.g. `80`).

This is the basic idea. But you will probably want to take care of some additional things, like:

* Security - HTTPS
* Running on startup
* Restarts

					continue
				}

				// if domain IPs intersect then it won't be an empty set.
				// such an intersection means that bucket exists on etcd.
				// but if we do see a difference with local domain IPs with
				// hostSlice from etcd then we should update with newer
				// domainIPs, we proceed to do that here.
				bucketsToBeUpdated.Add(bucket)
				continue
			}

				}
				for _, addr := range addrs {
					domainIPs.Add(addr)
				}
			}
			domainIPs.Add(endpoint)
		}
		updateDomainIPs(domainIPs)
	} else {
		// Add found interfaces IP address to global domain IPS,
		// loopback addresses will be naturally dropped.
		domainIPs := mustGetLocalIP4()
		for _, host := range globalEndpoints.Hostnames() {
			domainIPs.Add(host)
		}
		updateDomainIPs(domainIPs)
	}

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# Release Notes

## Latest Changes

### Docs

* 📝 Add documentation for Behind a Proxy - Proxy Forwarded Headers, using `--forwarded-allow-ips="*"`. PR [#14028](https://github.com/fastapi/fastapi/pull/14028) by [@tiangolo](https://github.com/tiangolo).
* 📝 Add deprecation info block about `dict()` in `docs/tutorial/body.md`. PR [#13906](https://github.com/fastapi/fastapi/pull/13906) by [@jomkv](https://github.com/jomkv).