Improve script wording

src/server_manager/install_scripts/install_server.sh

@@ -312,20 +312,20 @@ function check_firewall() {
      FIREWALL_STATUS="\
 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}.
-
-Make sure ports ${SB_API_PORT} and ${ACCESS_KEY_PORT} are open for TCP and UDP on
-your firewall, router or cloud provider.
-"
+provider) that is preventing incoming connections to ports ${SB_API_PORT} and ${ACCESS_KEY_PORT}."
   else
     FIREWALL_STATUS="\
 If you have connection problems, it may be that your router or cloud provider
-blocks inbound connections, even though your machine seems to allow them.
+blocks inbound connections, even though your machine seems to allow them."
+  fi
+  FIREWALL_STATUS="\
+$FIREWALL_STATUS
 
-Make sure ports ${SB_API_PORT} and ${ACCESS_KEY_PORT} are open for TCP and UDP on
-your firewall, router or cloud provider.
+Make sure to open the following ports on your firewall, router or cloud provider:
+- Management port ${SB_API_PORT}, for TCP
+- Access key port ${ACCESS_KEY_PORT}, for TCP and UDP
 "
-  fi
+
 }
 
 install_shadowbox() {