Add correct language for --rest-api-host-allowlist

docs/reference/cli/index.md

@@ -2745,7 +2745,7 @@ trusted parties.
 ### `rest-api-host-allowlist`
 
 <Tabs>
-  <TabItem value="Syntax" label="Syntax" default>
+ <TabItem value="Syntax" label="Syntax" default>
 
 ```bash
 --rest-api-host-allowlist=<hostname>[,<hostname>...]... or "*"
@@ -2755,28 +2755,39 @@ trusted parties.
  <TabItem value="Example" label="Example" >
 
 ```bash
---rest-api-host-allowlist=medomain.com,meotherdomain.com
+--rest-api-host-allowlist=localhost,127.0.0.1,10.0.0.1
 ```
 
  </TabItem>
  <TabItem value="Environment variable" label="Environment variable" >
 
 ```bash
-TEKU_REST_API_HOST_ALLOWLIST=medomain.com,meotherdomain.com
+TEKU_REST_API_HOST_ALLOWLIST=localhost,127.0.0.1,10.0.0.1
 ```
 
  </TabItem>
  <TabItem value="Configuration file" label="Configuration file" >
 
 ```bash
-rest-api-host-allowlist: ["medomain.com", "meotherdomain.com"]
+rest-api-host-allowlist: ["localhost", "127.0.0.1", "10.0.0.1"]
 ```
 
  </TabItem>
 </Tabs>
 
-A comma-separated list of hostnames to allow access to the REST API.
-By default, Teku accepts access from `localhost` and `127.0.0.1`.
+A comma-separated list of hostnames or IP addresses from which the REST API server will respond.
+This flag restricts the server's responding addresses, but not the client access.
+
+You can listen on all addresses using `--rest-api-interface="*"` but restrict responses to specific hosts with this flag.
+When you configure the interface to listen on all available IP addresses (`rest-api-interface: "0.0.0.0"`) and allow all hosts
+(`["*"]`), you enable connections from any address, such as `localhost` (127.0.0.1) or a specific network IP such as `10.0.0.1`.
+If you instead set the API to listen only on a specific IP, such as `10.0.0.1`, and still allow all hosts, only that IP can connect, and any attempts from `localhost` will fail.
+
+Configuring the interface to listen on all IP addresses but restricting the allowlist to `localhost` allows only `localhost` to connect, and other IP addresses, such as `10.0.0.1`, receive a 403 error.
+If the API listens on 10.0.0.1 but only allows `localhost`, neither can connect - `localhost` can't reach the server, and `10.0.0.1` is blocked.
+
+By default, Teku's REST API server responds only to requests where the Host header matches `localhost` or `127.0.0.1`.
+If you specify values, the server will only respond to requests where the Host header matches one of the specified hosts or IP addresses.
 
 :::warning