derp/derpserver: add a unique sender cardinality estimate

Adds an observation point that may identify potentially abusive traffic patterns at outlier values. Updates tailscale/corp#24681 Signed-off-by: James Tucker <james@tailscale.com>
2025-11-25 15:56:44 -08:00
parent 9eff8a4503
commit 5ee0c6bf1d
8 changed files with 238 additions and 4 deletions
@@ -16,4 +16,4 @@
 ) {
  src =  ./.;
 }).shellNix
-# nix-direnv cache busting line: sha256-jJSSXMyUqcJoZuqfSlBsKDQezyqS+jDkRglMMjG1K8g=
+# nix-direnv cache busting line: sha256-IkodqRYdueML7U2Hh8vRw6Et7+WII+VXuPJ3jZ2xYx8=