diff --git a/bgpwtf/machines/modules/router.nix b/bgpwtf/machines/modules/router.nix
index bdd5336..953b277 100644
--- a/bgpwtf/machines/modules/router.nix
+++ b/bgpwtf/machines/modules/router.nix
@@ -51,6 +51,13 @@
 
   # Enable the OpenSSH daemon.
   services.openssh.enable = true;
+  services.openssh.passwordAuthentication = false;
+  # Allow for slightly more unauthenticated connections between dropping them,
+  # otherwise public bruteforcing will cause DoS preventing actual users from
+  # logging in.
+  services.openssh.extraConfig = ''
+    MaxStartups 100:30:1000
+  '';
   users.users.root.openssh.authorizedKeys.keys = [
     "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIG599UildOrAq+LIOQjKqtGMwjgjIxozI1jtQQRKHtCP q3k@mimeomia"
     "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDQb3YQoiYFZLKwvHYKbu1bMqzNeDCAszQhAe1+QI5SLDOotclyY/vFmOReZOsmyMFl71G2d7d+FbYNusUnNNjTxRYQ021tVc+RkMdLJaORRURmQfEFEKbai6QSFTwErXzuoIzyEPK0lbsQuGgqT9WaVnRzHJ2Q/4+qQbxAS34PuR5NqEkmn4G6LMo3OyJ5mwPkCj9lsqz4BcxRaMWFO3mNcwGDfSW+sqgc3E8N6LKrTpZq3ke7xacpQmcG5DU9VO+2QVPdltl9jWbs3gXjmF92YRNOuKPVfAOZBBsp8JOznfx8s9wDgs7RwPmDpjIAJEyoABqW5hlXfqRbTnfnMvuR informatic@InformaticPC"