diff --git a/nixos/modules/installer/tools/nixos-generate-config.pl b/nixos/modules/installer/tools/nixos-generate-config.pl
index e17c02d1374..0a5624ff6a3 100644
--- a/nixos/modules/installer/tools/nixos-generate-config.pl
+++ b/nixos/modules/installer/tools/nixos-generate-config.pl
@@ -588,6 +588,12 @@ $bootLoaderConfig
   # Enable the OpenSSH daemon.
   # services.openssh.enable = true;
 
+  # Open ports in the firewall.
+  # networking.firewall.allowedTCPPorts = [ ... ];
+  # networking.firewall.allowedUDPPorts = [ ... ];
+  # Or disable the firewall altogether.
+  # networking.firewall.enable = false;
+
   # Enable CUPS to print documents.
   # services.printing.enable = true;