diff --git a/server/StrDss.Api/Authentication/ApsJwtBearerEvents.cs b/server/StrDss.Api/Authentication/ApsJwtBearerEvents.cs
index 6e5f8dc6..11866c63 100644
--- a/server/StrDss.Api/Authentication/ApsJwtBearerEvents.cs
+++ b/server/StrDss.Api/Authentication/ApsJwtBearerEvents.cs
@@ -25,6 +25,17 @@ public ApsJwtBearerEvents(ICurrentUser currentUser, IUserService userService, IR
             _memoryCache = memoryCache;
         }
 
+        public override Task AuthenticationFailed(AuthenticationFailedContext context)
+        {
+            var username = context.HttpContext.User?.Identity?.Name ?? "Unknown";
+            var ipAddress = context.HttpContext.Connection.RemoteIpAddress;
+            var ip = ipAddress == null ? "Unknown" : ipAddress.ToString();
+
+            _logger.LogInformation($"[AUTH] Authentication failed for user '{username}' from IP address '{ip}'.");
+
+            return base.AuthenticationFailed(context);
+        }
+
         public override async Task TokenValidated(TokenValidatedContext context)
         {
             _currentUser.LoadApsSession(context!.Principal!);