diff --git a/apps/stalker-mock-server/README.md b/apps/stalker-mock-server/README.md
index 2225803e4..6b37e4b04 100644
--- a/apps/stalker-mock-server/README.md
+++ b/apps/stalker-mock-server/README.md
@@ -41,6 +41,7 @@ imported as a **full portal** (handshake + token + watchdog), anything else as a
 |---|---|
 | `/portal.php` | Tolerant. Ignores the Bearer token and the MAC format, like most reseller panels in the wild. |
 | `/stalker_portal/server/load.php` | Strict. Enforces the token and the MAC format exactly like the real middleware. |
+| `/server/load.php` | Strict. The second full-portal URL shape the app recognizes; enforced identically. |
 
 The strict endpoint reproduces the parts of Stalker 4.9.35 that a client can
 actually get wrong:
@@ -48,7 +49,9 @@ actually get wrong:
 - Every action except `handshake`, `get_profile`, `get_localization` and
   `do_auth` requires `Authorization: Bearer <token>`.
 - A token only counts once `get_profile` has adopted it — a handshake alone is
-  not a session.
+  not a session. Adoption is deliberately stricter than the stock server:
+  only tokens the mock actually issued (or the already-bound one) are
+  accepted, so a client with a broken token pipeline fails loudly.
 - Auth failures come back as **HTTP 200 with a plain-text body**
   (`Authorization failed.`, `Unauthorized request.`), never a 401/403. Clients
   that only check status codes will silently render nothing.
@@ -74,7 +77,7 @@ actually get wrong:
 | `00:1A:79:00:00:05` | **embedded-series** | 50% of VOD items have embedded `series[]` arrays — tests the embedded series flow |
 | `00:1A:79:00:00:06` | **legacy-pagination** | No `get_all_channels` support — tests the paginated `get_ordered_list` crawl fallback for the full ITV channel list |
 | `00:1A:79:00:00:07` | **marketing-demo** | 35 original poster movies with the newest 20 first — safe for screenshots and marketing |
-| `00:1A:79:00:00:08` | **login-required** | `get_profile` answers `status: 2` until the client completes `do_auth` and retries with `auth_second_step=1` |
+| `00:1A:79:00:00:08` | **login-required** | `get_profile` answers `status: 2` until the client completes `do_auth` with non-empty credentials |
 | `<any other MAC>` | **auto** | MAC bytes used as seed → deterministic unique dataset |
 
 ## Configuration
@@ -90,7 +93,7 @@ actually get wrong:
 |---|---|---|
 | `/health` | `GET` | Health check — returns `{ status: "ok" }` |
 | `/reset` | `POST` | Clear all in-memory data, favorites, sessions and watchdog counters (useful between test runs) |
-| `/invalidate-session?macAddress=<mac>` | `POST` | Drop that MAC's session so the next portal call fails with `Authorization failed.` — lets tests assert the client re-handshakes and retries |
+| `/invalidate-session?macAddress=<mac>` | `POST` | Drop that MAC's tokens so the next portal call fails with `Authorization failed.` — lets tests assert the client re-handshakes and retries. Pinned device identity survives, as on a real portal |
 
 ## API Coverage
 
@@ -101,7 +104,7 @@ All endpoints are served at `GET /portal.php?action=<action>&...` matching the r
 | `handshake` | Issues the access token (idempotent) plus the 5.x `random` nonce and `not_valid` flag |
 | `get_profile` | Turns the handshake token into a session; enforces device-id pinning, and on the strict endpoint the MAC format |
 | `get_events` | Watchdog ping; records the call and returns an empty event set (never affects authorization, as on a real portal) |
-| `do_auth` | Returns a mock user profile |
+| `do_auth` | Boolean login step: `{js:true}` for non-empty credentials (recorded for the login-required scenario), `{js:false}` otherwise |
 | `get_categories` | Category list filtered by `type` (itv/vod/series) |
 | `get_genres` | Genre list (mirrors categories) |
 | `get_ordered_list` | Paginated content list; if `movie_id` is present → returns seasons |
diff --git a/apps/stalker-mock-server/src/app/auth-store.spec.ts b/apps/stalker-mock-server/src/app/auth-store.spec.ts
index c3eeac35b..c33069bcb 100644
--- a/apps/stalker-mock-server/src/app/auth-store.spec.ts
+++ b/apps/stalker-mock-server/src/app/auth-store.spec.ts
@@ -2,8 +2,10 @@ import { Request } from 'express';
 import {
     adoptToken,
     checkRequestAuthorization,
+    hasCompletedDoAuth,
     invalidateSession,
     issueHandshakeToken,
+    markDoAuthCompleted,
     pinDeviceIdentity,
     readBearerToken,
     resetAuthState,
@@ -89,6 +91,28 @@ describe('stalker mock auth store', () => {
         );
     });
 
+    it('refuses to adopt a token the handshake never issued', () => {
+        issueHandshakeToken(MAC);
+
+        // Stricter than the stock server on purpose: a forged or stale token
+        // must not become a session, or the mock cannot catch a client whose
+        // token pipeline is broken.
+        expect(adoptToken(MAC, 'F0RGEDF0RGEDF0RGEDF0RGEDF0RGED12')).toBe(false);
+        expect(
+            checkRequestAuthorization(
+                request({ token: 'F0RGEDF0RGEDF0RGEDF0RGEDF0RGED12' }),
+                true
+            )
+        ).toBe('Authorization failed.');
+    });
+
+    it('re-adopts the already-bound token', () => {
+        const { token } = issueHandshakeToken(MAC);
+        adoptToken(MAC, token);
+
+        expect(adoptToken(MAC, token)).toBe(true);
+    });
+
     it('fails after the session is invalidated so clients must re-authenticate', () => {
         const { token } = issueHandshakeToken(MAC);
         adoptToken(MAC, token);
@@ -99,6 +123,26 @@ describe('stalker mock auth store', () => {
         );
     });
 
+    it('keeps pinned device identity across session invalidation', () => {
+        pinDeviceIdentity(MAC, 'dev-1', undefined);
+        invalidateSession(MAC);
+
+        // Losing the token (another device logged in) never unpins device_id
+        // on a real portal, so a changed identity must still conflict.
+        expect(pinDeviceIdentity(MAC, 'other', undefined)).toBe(
+            'device conflict - device_id mismatch'
+        );
+    });
+
+    it('tracks do_auth completion per MAC', () => {
+        expect(hasCompletedDoAuth(MAC)).toBe(false);
+
+        markDoAuthCompleted(MAC);
+
+        expect(hasCompletedDoAuth(MAC)).toBe(true);
+        expect(hasCompletedDoAuth('00:1A:79:00:00:99')).toBe(false);
+    });
+
     it('never enforces the token when enforcement is off', () => {
         expect(checkRequestAuthorization(request({}), false)).toBe(null);
     });
diff --git a/apps/stalker-mock-server/src/app/auth-store.ts b/apps/stalker-mock-server/src/app/auth-store.ts
index 28680de9e..a69b5d7db 100644
--- a/apps/stalker-mock-server/src/app/auth-store.ts
+++ b/apps/stalker-mock-server/src/app/auth-store.ts
@@ -20,6 +20,8 @@ interface PortalSession {
     pendingToken?: string;
     /** Token stored for the MAC — what authorizes non-auth actions. */
     accessToken?: string;
+    /** Whether do_auth completed with non-empty credentials for this MAC. */
+    didAuth?: boolean;
     deviceId?: string;
     deviceId2?: string;
 }
@@ -83,11 +85,32 @@ export function issueHandshakeToken(mac: string, presentedToken?: string): {
     return { token, notValid: Boolean(presentedToken) };
 }
 
-/** Adopt the handshake token as the MAC's session token (what get_profile does). */
-export function adoptToken(mac: string, token: string): void {
+/**
+ * Adopt the handshake token as the MAC's session token (what get_profile
+ * does). Deliberately STRICTER than the stock server here: 4.9.35 issues
+ * handshake tokens statelessly and pins whatever Bearer get_profile presents,
+ * so a forged token would become a session on a real portal. The mock only
+ * adopts tokens it actually issued (or the already-bound one), so a client
+ * with a broken or substituted token pipeline fails loudly in tests instead
+ * of passing by accident.
+ */
+export function adoptToken(mac: string, token: string): boolean {
     const session = getSession(mac);
+    if (token !== session.pendingToken && token !== session.accessToken) {
+        return false;
+    }
     session.accessToken = token;
     session.pendingToken = undefined;
+    return true;
+}
+
+/** Record that do_auth completed with non-empty credentials for this MAC. */
+export function markDoAuthCompleted(mac: string): void {
+    getSession(mac).didAuth = true;
+}
+
+export function hasCompletedDoAuth(mac: string): boolean {
+    return getSession(mac).didAuth === true;
 }
 
 export function readBearerToken(req: Request): string | undefined {
@@ -163,9 +186,19 @@ export function checkRequestAuthorization(
     return null;
 }
 
-/** Drop the MAC's session so the next request must re-authenticate. */
+/**
+ * Drop the MAC's tokens so the next request must re-authenticate. Pinned
+ * device identity survives on purpose: on a real portal a lost token (another
+ * device logged in) never unpins device_id, so re-authenticating with a
+ * changed identity must still hit the device-conflict branch.
+ */
 export function invalidateSession(mac: string): void {
-    sessions.delete(mac.toLowerCase());
+    const session = sessions.get(mac.toLowerCase());
+    if (!session) {
+        return;
+    }
+    session.accessToken = undefined;
+    session.pendingToken = undefined;
 }
 
 export function resetAuthState(): void {
diff --git a/apps/stalker-mock-server/src/app/handlers/do-auth.handler.ts b/apps/stalker-mock-server/src/app/handlers/do-auth.handler.ts
index 51afe2a5b..affa24fd7 100644
--- a/apps/stalker-mock-server/src/app/handlers/do-auth.handler.ts
+++ b/apps/stalker-mock-server/src/app/handlers/do-auth.handler.ts
@@ -1,25 +1,25 @@
 import { Request, Response } from 'express';
+import { markDoAuthCompleted } from '../auth-store.js';
+import { extractMac } from '../request-mac.js';
 
 /**
- * Stalker do_auth — returns user profile / account info.
+ * Stalker do_auth — the login/password step behind `get_profile` status 2.
+ *
+ * The real portal never checks a password itself: it proxies the credentials
+ * to the operator's billing script and answers a bare boolean. The mock
+ * accepts any non-empty pair, records the completion so `get_profile` can
+ * stop answering `status: 2` for the login-required scenario, and rejects
+ * empty credentials the way a billing script would.
  */
 export function handleDoAuth(req: Request, res: Response): void {
-    res.json({
-        js: {
-            id: '1',
-            name: 'Mock User',
-            login: 'mockuser',
-            password: '',
-            status: 'active',
-            tariff_expired_date: '2099-12-31',
-            phone: '',
-            ls: '0',
-            created: new Date().toISOString(),
-            updated: new Date().toISOString(),
-            blocked: '0',
-            acc_enabled: '1',
-            max_connections: '1',
-            active_connections: '0',
-        },
-    });
+    const login = String(req.query['login'] ?? '');
+    const password = String(req.query['password'] ?? '');
+
+    if (!login || !password) {
+        res.json({ js: false });
+        return;
+    }
+
+    markDoAuthCompleted(extractMac(req));
+    res.json({ js: true });
 }
diff --git a/apps/stalker-mock-server/src/app/handlers/get-profile.handler.ts b/apps/stalker-mock-server/src/app/handlers/get-profile.handler.ts
index 0e6f15cb2..463fb8466 100644
--- a/apps/stalker-mock-server/src/app/handlers/get-profile.handler.ts
+++ b/apps/stalker-mock-server/src/app/handlers/get-profile.handler.ts
@@ -1,5 +1,10 @@
 import { Request, Response } from 'express';
-import { adoptToken, pinDeviceIdentity, readBearerToken } from '../auth-store.js';
+import {
+    adoptToken,
+    hasCompletedDoAuth,
+    pinDeviceIdentity,
+    readBearerToken,
+} from '../auth-store.js';
 import { getScenario } from '../scenarios.js';
 import { extractMac } from '../request-mac.js';
 
@@ -28,7 +33,11 @@ export function handleGetProfile(
         return;
     }
 
-    if (scenario.requiresLogin && req.query['auth_second_step'] !== '1') {
+    // Gate on the actual do_auth completion, not on auth_second_step: the app
+    // sends auth_second_step=1 on its very first get_profile, so a parameter
+    // check would let the login-required flow be bypassed without ever
+    // exercising status 2 -> do_auth -> profile retry.
+    if (scenario.requiresLogin && !hasCompletedDoAuth(mac)) {
         res.json({
             js: {
                 status: 2,
diff --git a/apps/stalker-mock-server/src/main.ts b/apps/stalker-mock-server/src/main.ts
index a98a2bdde..e5b5c9a81 100644
--- a/apps/stalker-mock-server/src/main.ts
+++ b/apps/stalker-mock-server/src/main.ts
@@ -81,9 +81,22 @@ app.use(
 // Stalker portal.php endpoint (reseller-panel alias — tolerant, no token check)
 app.use('/portal.php', portalRouter);
 
-// Canonical Ministra endpoint — enforces the Bearer token and the MAC format
+// Canonical Ministra endpoints — enforce the Bearer token and the MAC format
 // exactly like the real middleware, so the full-portal auth flow is testable.
+// Both URL shapes the app classifies as "full" must land on the strict branch.
 app.use('/stalker_portal/server/load.php', createPortalRouter(true));
+app.use('/server/load.php', createPortalRouter(true));
+
+/**
+ * Mirror of the app's full-portal predicates (`isFullStalkerPortal` checks
+ * `/stalker_portal/` or `/server/load.php`; import-time normalization checks
+ * `/stalker_portal`). Any URL shape the client would authenticate against must
+ * be enforced by the proxy too, or tests would silently exercise the tolerant
+ * branch.
+ */
+function isFullPortalUrlShape(url: string): boolean {
+    return url.includes('/stalker_portal') || url.includes('/server/load.php');
+}
 
 /**
  * CORS proxy compatibility endpoint — mirrors the IPTVnator backend API shape:
@@ -140,9 +153,9 @@ app.get('/stalker', (req: Request, res: Response) => {
     } as unknown as Response & { send: (body: string) => void };
 
     dispatchPortalAction(syntheticReq, syntheticRes, {
-        // The proxied portal URL decides strictness, matching the two direct
-        // endpoints: a canonical Ministra path enforces the token.
-        enforceAuth: (asString(portalUrl) ?? '').includes('/stalker_portal/'),
+        // The proxied portal URL decides strictness, matching the direct
+        // endpoints: every canonical Ministra path shape enforces the token.
+        enforceAuth: isFullPortalUrlShape(asString(portalUrl) ?? ''),
     });
 
     // The portal answers auth failures with a plain-text body; the real backend
diff --git a/docs/architecture/stalker-mock-server.md b/docs/architecture/stalker-mock-server.md
index f1106cc51..19b4d93df 100644
--- a/docs/architecture/stalker-mock-server.md
+++ b/docs/architecture/stalker-mock-server.md
@@ -51,6 +51,11 @@ paths:
 |---|---|---|
 | `/portal.php` | `createPortalRouter(false)` | Tolerant: ignores the token and the MAC format, like most reseller panels |
 | `/stalker_portal/server/load.php` | `createPortalRouter(true)` | Strict: enforces both, like the real middleware |
+| `/server/load.php` | `createPortalRouter(true)` | Strict: the second URL shape `isFullStalkerPortal` recognizes |
+
+The `/stalker` proxy route applies the same rule through
+`isFullPortalUrlShape()` — every URL the client would authenticate against is
+enforced, so tests cannot silently fall into the tolerant branch.
 
 Keeping the tolerant path is what lets the pre-existing e2e suite (which imports
 `portal.php`) stay meaningful — it covers the simple-portal branch — while the
@@ -66,7 +71,11 @@ The strict behaviours mirror the plaintext Stalker 4.9.35 middleware
   sees "success" and renders nothing. The `/stalker` proxy route still wraps the
   body in the `{ payload }` envelope, matching what `apps/web-backend` does.
 - **A handshake is not a session.** The token only authorizes requests once
-  `get_profile` has adopted it for that MAC.
+  `get_profile` has adopted it for that MAC. Adoption is deliberately
+  *stricter* than the stock server: 4.9.35 issues handshake tokens statelessly
+  and pins whatever Bearer `get_profile` presents, so a forged token would
+  become a session on a real portal — the mock only adopts tokens it actually
+  issued, so a client with a broken token pipeline fails loudly in tests.
 - **Idempotent handshake.** Presenting the MAC's current token returns that same
   token, which is what allows real clients to persist tokens across restarts.
 - **Device-id pinning.** `device_id`/`device_id2` are stored on first non-empty
@@ -78,9 +87,17 @@ The strict behaviours mirror the plaintext Stalker 4.9.35 middleware
 - **MAC format validation.** Non-Infomir MACs (`00:1A:79:XX:XX:XX`) get a bare
   `{ status: 1 }` from `get_profile`.
 
+- **`do_auth` is a boolean login step.** Non-empty credentials answer
+  `{js:true}` and are recorded; the `login-required` scenario's `get_profile`
+  keeps answering `status: 2` until that record exists, because the app sends
+  `auth_second_step=1` on its very first profile request and a parameter check
+  alone would be trivially bypassed.
+
 Session state lives in `src/app/auth-store.ts` and is cleared by `/reset`.
-`POST /invalidate-session?macAddress=<mac>` drops a single session so tests can
-assert the client re-handshakes and retries instead of surfacing an error.
+`POST /invalidate-session?macAddress=<mac>` drops a single MAC's tokens so
+tests can assert the client re-handshakes and retries instead of surfacing an
+error; pinned device identity survives invalidation, as it does on a real
+portal.
 
 ## Data Generation Pipeline