diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.Security/ServiceCollectionExtensions.cs b/src/Server/ZB.MOM.WW.OtOpcUa.Security/ServiceCollectionExtensions.cs
index f62b7e5f..2eba6ddd 100644
--- a/src/Server/ZB.MOM.WW.OtOpcUa.Security/ServiceCollectionExtensions.cs
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.Security/ServiceCollectionExtensions.cs
@@ -1,3 +1,4 @@
+using Microsoft.AspNetCore.Authentication;
 using Microsoft.AspNetCore.Authentication.Cookies;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.DataProtection;
@@ -11,6 +12,7 @@ using ZB.MOM.WW.Auth.AspNetCore;
 using ZB.MOM.WW.Auth.Abstractions.Roles;
 using ZB.MOM.WW.OtOpcUa.Configuration;
 using ZB.MOM.WW.OtOpcUa.Security.Audit;
+using ZB.MOM.WW.OtOpcUa.Security.Auth;
 using ZB.MOM.WW.OtOpcUa.Security.Jwt;
 using ZB.MOM.WW.OtOpcUa.Security.Ldap;
 
@@ -36,6 +38,7 @@ public static class ServiceCollectionExtensions
         services.AddOptions<JwtOptions>().Bind(configuration.GetSection(JwtOptions.SectionName));
         services.AddOptions<OtOpcUaCookieOptions>().Bind(configuration.GetSection(OtOpcUaCookieOptions.SectionName));
         services.AddOptions<LdapOptions>().Bind(configuration.GetSection(LdapOptions.SectionName));
+        services.AddOptions<AuthDisableLoginOptions>().Bind(configuration.GetSection(AuthDisableLoginOptions.SectionName));
 
         services.AddSingleton<JwtTokenService>();
 
@@ -69,8 +72,32 @@ public static class ServiceCollectionExtensions
             .PersistKeysToDbContext<OtOpcUaConfigDbContext>()
             .SetApplicationName("OtOpcUa");
 
-        services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme)
-            .AddCookie(o =>
+        var disableLogin = configuration
+            .GetSection(AuthDisableLoginOptions.SectionName)
+            .GetValue<bool>(nameof(AuthDisableLoginOptions.DisableLogin));
+
+        var authBuilder = services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme);
+        if (disableLogin)
+        {
+            // DEV/TEST ONLY: replace the cookie handler with an always-succeeding handler registered
+            // UNDER the cookie scheme name, so FallbackPolicy + FleetAdmin + DriverOperator (which all
+            // name this scheme) authenticate through it and pass with all roles — zero policy changes.
+            authBuilder.AddScheme<AuthenticationSchemeOptions, AutoLoginAuthenticationHandler>(
+                CookieAuthenticationDefaults.AuthenticationScheme, _ => { });
+
+            // Loud, once-at-first-resolve warning (mirrors the cookie RequireHttps warning idiom below).
+            services.AddOptions<AuthDisableLoginOptions>()
+                .PostConfigure<ILoggerFactory>((opts, lf) =>
+                {
+                    lf.CreateLogger("ZB.MOM.WW.OtOpcUa.Security").LogWarning(
+                        "AdminUI LOGIN DISABLED (Security:Auth:DisableLogin=true) — every request is " +
+                        "authenticated as '{User}' with FULL permissions ({Roles}). Dev/test only; never " +
+                        "enable in production.", opts.User, string.Join(",", DevAuthRoles.All));
+                });
+        }
+        else
+        {
+            authBuilder.AddCookie(o =>
             {
                 // Static fields only — Name / ExpireTimeSpan / SecurePolicy / SlidingExpiration /
                 // HttpOnly / SameSite are applied from OtOpcUaCookieOptions via ZbCookieDefaults
@@ -80,6 +107,7 @@ public static class ServiceCollectionExtensions
                 // No OnRedirectToLogin / OnRedirectToAccessDenied overrides — let the framework's
                 // built-in IsAjaxRequest heuristic do its thing (302 for browsers, 401 for AJAX).
             });
+        }
 
         // Externalised cookie config — mirrors ScadaBridge's PostConfigure pattern. Fixes a
         // pre-existing latent bug where OtOpcUaCookieOptions was bound but ignored.
diff --git a/tests/Server/ZB.MOM.WW.OtOpcUa.Security.Tests/AddOtOpcUaAuthWiringTests.cs b/tests/Server/ZB.MOM.WW.OtOpcUa.Security.Tests/AddOtOpcUaAuthWiringTests.cs
new file mode 100644
index 00000000..2ec9c00c
--- /dev/null
+++ b/tests/Server/ZB.MOM.WW.OtOpcUa.Security.Tests/AddOtOpcUaAuthWiringTests.cs
@@ -0,0 +1,38 @@
+using Microsoft.AspNetCore.Authentication;
+using Microsoft.AspNetCore.Authentication.Cookies;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Shouldly;
+using Xunit;
+using ZB.MOM.WW.OtOpcUa.Security;
+using ZB.MOM.WW.OtOpcUa.Security.Auth;
+
+namespace ZB.MOM.WW.OtOpcUa.Security.Tests;
+
+public class AddOtOpcUaAuthWiringTests
+{
+    private static async Task<Type> CookieHandlerTypeAsync(bool disableLogin)
+    {
+        var config = new ConfigurationBuilder().AddInMemoryCollection(new Dictionary<string, string?>
+        {
+            ["Security:Auth:DisableLogin"] = disableLogin ? "true" : "false",
+        }).Build();
+
+        var services = new ServiceCollection();
+        services.AddLogging();
+        services.AddOtOpcUaAuth(config);
+
+        await using var sp = services.BuildServiceProvider();
+        var provider = sp.GetRequiredService<IAuthenticationSchemeProvider>();
+        var scheme = await provider.GetSchemeAsync(CookieAuthenticationDefaults.AuthenticationScheme);
+        return scheme!.HandlerType;
+    }
+
+    [Fact]
+    public async Task DisableLogin_true_registers_autologin_handler_for_cookie_scheme()
+        => (await CookieHandlerTypeAsync(true)).ShouldBe(typeof(AutoLoginAuthenticationHandler));
+
+    [Fact]
+    public async Task DisableLogin_false_registers_cookie_handler()
+        => (await CookieHandlerTypeAsync(false)).ShouldBe(typeof(CookieAuthenticationHandler));
+}