Update install script instructions

src/server_manager/install_scripts/install_server.sh

@@ -314,23 +314,16 @@ You won’t be able to access it externally, despite your server being correctly
 set up, because there's a firewall (in this machine, your router or cloud
 provider) that is preventing incoming connections to ports ${SB_API_PORT} and ${ACCESS_KEY_PORT}.
 
-- If you plan to have a single access key to access your server, opening those
-  ports for TCP and UDP should suffice.
-- If you plan on adding additional access keys, you’ll have to open ports 1024
-  through 65535 on your firewall since the Outline server may allocate any of
-  those ports to new access keys.
+Make sure ports ${SB_API_PORT} and ${ACCESS_KEY_PORT} are open for TCP and UDP on
+your firewall, router or cloud provider.
 "
   else
     FIREWALL_STATUS="\
 If you have connection problems, it may be that your router or cloud provider
 blocks inbound connections, even though your machine seems to allow them.
 
-- If you plan to have a single access key to access your server make sure
-  ports ${SB_API_PORT} and ${ACCESS_KEY_PORT} are open for TCP and UDP on
-  your router or cloud provider.
-- If you plan on adding additional access keys, you’ll have to open ports
-  1024 through 65535 on your router or cloud provider since the Outline
-  Server may allocate any of those ports to new access keys.
+Make sure ports ${SB_API_PORT} and ${ACCESS_KEY_PORT} are open for TCP and UDP on
+your firewall, router or cloud provider.
 "
   fi
 }