Update firewall information in "Contributing Storage" doc

docs/operator/contributing-storage.md

@@ -41,16 +41,14 @@ storage:
       capacity: 100
 ```
 
-## Setup Firewall
-
-You will need to configure your hosts's firewall to allow traffic from
-cryptic-net IPs on the ports you specified in your allocations.
-
 ## Restart the Daemon
 
 With the `daemon.yml` configured, you should restart your `cryptic-net daemon`
 process.
 
+The `cryptic-net daemon` will automatically allow the ports used for your
+storage allocations in the vpn firewall.
+
 ## Further Reading
 
 cryptic-net uses the [garage][garage] project for its storage system. See the