From ba45743ea03e3f02fb0793fe592232f26844f45b Mon Sep 17 00:00:00 2001
From: Simon Gardling <titaniumtown@proton.me>
Date: Tue, 20 Jan 2026 14:39:29 -0500
Subject: [PATCH] fail2ban: implement for gitea

---
 services/gitea.nix | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/services/gitea.nix b/services/gitea.nix
index aae4fbb..e64f218 100644
--- a/services/gitea.nix
+++ b/services/gitea.nix
@@ -58,4 +58,19 @@
   };
 
   services.openssh.settings.AllowUsers = [ config.services.gitea.user ];
+
+  # Protect Gitea login from brute force attacks
+  services.fail2ban.jails.gitea = {
+    enabled = true;
+    settings = {
+      backend = "systemd";
+      port = "http,https";
+      # defaults: maxretry=5, findtime=10m, bantime=10m
+    };
+    filter.Definition = {
+      failregex = ''^.*Failed authentication attempt for .* from <HOST>:.*$'';
+      ignoreregex = "";
+      journalmatch = "_SYSTEMD_UNIT=gitea.service";
+    };
+  };
 }