diff --git a/services/identity-service/src/main/kotlin/ru/ysu/lms/identity/auth/AuthDtos.kt b/services/identity-service/src/main/kotlin/ru/ysu/lms/identity/auth/AuthDtos.kt
index 3f15085..5d93681 100644
--- a/services/identity-service/src/main/kotlin/ru/ysu/lms/identity/auth/AuthDtos.kt
+++ b/services/identity-service/src/main/kotlin/ru/ysu/lms/identity/auth/AuthDtos.kt
@@ -42,4 +42,5 @@ data class MeResponse(
     val role: String,
     val name: String,
     val mustChangePassword: Boolean,
+    val active: Boolean = true,
 )
diff --git a/services/identity-service/src/main/kotlin/ru/ysu/lms/identity/auth/AuthService.kt b/services/identity-service/src/main/kotlin/ru/ysu/lms/identity/auth/AuthService.kt
index f9d30ad..d43cc0b 100644
--- a/services/identity-service/src/main/kotlin/ru/ysu/lms/identity/auth/AuthService.kt
+++ b/services/identity-service/src/main/kotlin/ru/ysu/lms/identity/auth/AuthService.kt
@@ -73,22 +73,25 @@ class AuthService(
     }
 
     private fun ensureLoginAllowed(account: Account) {
-        if (account.status != AccountStatus.ACTIVE) {
-            throw UnauthorizedException("Аккаунт архивирован")
-        }
-        if (account.role != LmsRole.STUDENT) return
-        val status = students.findById(account.id).map { it.status }.orElse(null)
-        if (status in setOf(StudentStatus.EXPELLED, StudentStatus.GRADUATED, StudentStatus.ARCHIVED)) {
-            throw UnauthorizedException("Доступ к системе закрыт")
-        }
-        ensureGroupOpen(account)
+        loginDeniedReason(account)?.let { throw UnauthorizedException(it) }
     }
 
-    private fun ensureGroupOpen(account: Account) {
-        val groupStatus = enrollments.findByStudentAccountId(account.id)?.group?.status
-        if (groupStatus in setOf(GroupStatus.GRADUATED, GroupStatus.ARCHIVED)) {
-            throw UnauthorizedException("Группа закрыта")
+    /** Причина запрета входа или null, если вход разрешён. Используется и в me(). */
+    private fun loginDeniedReason(account: Account): String? {
+        if (account.status != AccountStatus.ACTIVE) {
+            return "Аккаунт архивирован"
         }
+        if (account.role != LmsRole.STUDENT) return null
+        val status = students.findById(account.id).map { it.status }.orElse(null)
+        if (status in setOf(StudentStatus.EXPELLED, StudentStatus.GRADUATED, StudentStatus.ARCHIVED)) {
+            return "Доступ к системе закрыт"
+        }
+        return groupDeniedReason(account)
+    }
+
+    private fun groupDeniedReason(account: Account): String? {
+        val groupStatus = enrollments.findByStudentAccountId(account.id)?.group?.status
+        return if (groupStatus in setOf(GroupStatus.GRADUATED, GroupStatus.ARCHIVED)) "Группа закрыта" else null
     }
 
     @Transactional(readOnly = true)
@@ -103,6 +106,7 @@ class AuthService(
             role = account.role.name,
             name = displayName(account),
             mustChangePassword = account.mustChangePassword,
+            active = loginDeniedReason(account) == null,
         )
     }
 
diff --git a/services/identity-service/src/test/kotlin/ru/ysu/lms/identity/AuthServiceMeActiveTest.kt b/services/identity-service/src/test/kotlin/ru/ysu/lms/identity/AuthServiceMeActiveTest.kt
new file mode 100644
index 0000000..d32cd88
--- /dev/null
+++ b/services/identity-service/src/test/kotlin/ru/ysu/lms/identity/AuthServiceMeActiveTest.kt
@@ -0,0 +1,95 @@
+package ru.ysu.lms.identity
+
+import io.mockk.every
+import io.mockk.mockk
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.Test
+import org.springframework.security.crypto.password.PasswordEncoder
+import org.springframework.security.oauth2.jwt.JwtEncoder
+import ru.ysu.lms.identity.auth.AuthService
+import ru.ysu.lms.identity.auth.LoginBackoff
+import ru.ysu.lms.identity.domain.Account
+import ru.ysu.lms.identity.domain.AccountStatus
+import ru.ysu.lms.identity.domain.Enrollment
+import ru.ysu.lms.identity.domain.GroupEntity
+import ru.ysu.lms.identity.domain.GroupStatus
+import ru.ysu.lms.identity.domain.Student
+import ru.ysu.lms.identity.domain.StudentStatus
+import ru.ysu.lms.identity.repo.AccountRepository
+import ru.ysu.lms.identity.repo.EnrollmentRepository
+import ru.ysu.lms.identity.repo.LoginAttemptRepository
+import ru.ysu.lms.identity.repo.StudentRepository
+import ru.ysu.lms.security.JwtProperties
+import ru.ysu.lms.security.LmsRole
+import java.time.Duration
+import java.util.Optional
+
+class AuthServiceMeActiveTest {
+    @Test
+    fun `me is active for active student`() {
+        val account = studentAccount()
+        val service = service(account, Student(accountId = account.id, lastName = "Иванов", firstName = "Иван"))
+
+        val me = service.me(account.id)
+
+        assertThat(me.active).isTrue()
+        assertThat(me.name).isEqualTo("Иванов Иван")
+    }
+
+    @Test
+    fun `me is inactive for expelled student`() {
+        val account = studentAccount()
+        val student =
+            Student(
+                accountId = account.id,
+                lastName = "Иванов",
+                firstName = "Иван",
+                status = StudentStatus.EXPELLED,
+            )
+        val service = service(account, student)
+
+        assertThat(service.me(account.id).active).isFalse()
+    }
+
+    @Test
+    fun `me is inactive for archived group`() {
+        val account = studentAccount()
+        val student = Student(accountId = account.id, lastName = "Иванов", firstName = "Иван")
+        val group = GroupEntity(name = "ИВТ-21", status = GroupStatus.ARCHIVED)
+        val service = service(account, student, Enrollment(group = group))
+
+        assertThat(service.me(account.id).active).isFalse()
+    }
+
+    @Test
+    fun `me is inactive for archived account`() {
+        val account = studentAccount().apply { status = AccountStatus.ARCHIVED }
+        val service = service(account, Student(accountId = account.id, lastName = "Иванов", firstName = "Иван"))
+
+        assertThat(service.me(account.id).active).isFalse()
+    }
+
+    private fun studentAccount(): Account = Account(login = "2025001", passwordHash = "hash", role = LmsRole.STUDENT)
+
+    private fun service(
+        account: Account,
+        student: Student,
+        enrollment: Enrollment? = null,
+    ): AuthService {
+        val accounts = mockk<AccountRepository>()
+        every { accounts.findById(account.id) } returns Optional.of(account)
+        val students = mockk<StudentRepository>()
+        every { students.findById(account.id) } returns Optional.of(student)
+        val enrollments = mockk<EnrollmentRepository>()
+        every { enrollments.findByStudentAccountId(account.id) } returns enrollment
+        return AuthService(
+            accounts,
+            students,
+            enrollments,
+            mockk<PasswordEncoder>(),
+            mockk<JwtEncoder>(),
+            JwtProperties(accessTokenTtl = Duration.ofMinutes(10)),
+            LoginBackoff(mockk<LoginAttemptRepository>(relaxed = true)),
+        )
+    }
+}
diff --git a/web/src/main/kotlin/ru/ysu/lms/web/api/ApiClient.kt b/web/src/main/kotlin/ru/ysu/lms/web/api/ApiClient.kt
index dd156db..e6001ed 100644
--- a/web/src/main/kotlin/ru/ysu/lms/web/api/ApiClient.kt
+++ b/web/src/main/kotlin/ru/ysu/lms/web/api/ApiClient.kt
@@ -33,6 +33,20 @@ class ApiClient(
 
     internal fun bearer(token: String): String = "Bearer $token"
 
+    /**
+     * Текущее состояние аккаунта. Метод-член (а не extension), чтобы его можно было
+     * подменить в тестах AuthInterceptor.
+     */
+    fun me(token: String): MeDto =
+        call {
+            client
+                .get()
+                .uri("/api/v1/auth/me")
+                .header(HttpHeaders.AUTHORIZATION, bearer(token))
+                .retrieve()
+                .body(MeDto::class.java)
+        }
+
     internal fun <T> callOrNull(block: () -> T?): T? =
         try {
             block()
diff --git a/web/src/main/kotlin/ru/ysu/lms/web/api/ApiDtos.kt b/web/src/main/kotlin/ru/ysu/lms/web/api/ApiDtos.kt
index 120a681..4dc80e5 100644
--- a/web/src/main/kotlin/ru/ysu/lms/web/api/ApiDtos.kt
+++ b/web/src/main/kotlin/ru/ysu/lms/web/api/ApiDtos.kt
@@ -18,6 +18,16 @@ data class AuthResponseDto(
     val mustChangePassword: Boolean = false,
 )
 
+@JsonIgnoreProperties(ignoreUnknown = true)
+data class MeDto(
+    val id: String = "",
+    val login: String = "",
+    val role: String = "",
+    val name: String = "",
+    val mustChangePassword: Boolean = false,
+    val active: Boolean = true,
+)
+
 data class LoginPayload(
     val login: String,
     val password: String,
diff --git a/web/src/main/kotlin/ru/ysu/lms/web/session/AuthInterceptor.kt b/web/src/main/kotlin/ru/ysu/lms/web/session/AuthInterceptor.kt
index 299c70c..5846fac 100644
--- a/web/src/main/kotlin/ru/ysu/lms/web/session/AuthInterceptor.kt
+++ b/web/src/main/kotlin/ru/ysu/lms/web/session/AuthInterceptor.kt
@@ -2,11 +2,22 @@ package ru.ysu.lms.web.session
 
 import jakarta.servlet.http.HttpServletRequest
 import jakarta.servlet.http.HttpServletResponse
+import jakarta.servlet.http.HttpSession
 import org.springframework.stereotype.Component
 import org.springframework.web.servlet.HandlerInterceptor
+import ru.ysu.lms.web.api.ApiClient
+import ru.ysu.lms.web.api.ApiException
+import ru.ysu.lms.web.api.MeDto
 
+/**
+ * Проверяет вход и периодически перепроверяет аккаунт в identity-service.
+ * Сессия BFF живёт дольше access-токена, поэтому без такой проверки отчисленный
+ * студент или архивная группа продолжали бы пользоваться порталом.
+ */
 @Component
-class AuthInterceptor : HandlerInterceptor {
+class AuthInterceptor(
+    private val api: ApiClient,
+) : HandlerInterceptor {
     override fun preHandle(
         request: HttpServletRequest,
         response: HttpServletResponse,
@@ -18,11 +29,84 @@ class AuthInterceptor : HandlerInterceptor {
             response.sendRedirect("/login")
             return false
         }
+        if (!revalidate(session, user, response)) return false
+        val current = session.getAttribute(SessionKeys.USER) as? SessionUser ?: user
         val uri = request.requestURI
-        if (user.mustChangePassword && !uri.startsWith("/change-password")) {
+        if (current.mustChangePassword && !uri.startsWith("/change-password")) {
             response.sendRedirect("/change-password")
             return false
         }
         return true
     }
+
+    /** true — запрос можно продолжать; false — сессия уже завершена и отправлен redirect. */
+    private fun revalidate(
+        session: HttpSession,
+        user: SessionUser,
+        response: HttpServletResponse,
+    ): Boolean {
+        if (!isCheckDue(session)) return true
+        val token = session.getAttribute(SessionKeys.TOKEN) as? String
+        if (token == null) {
+            markChecked(session)
+            return true
+        }
+        return try {
+            val me = api.me(token)
+            markChecked(session)
+            if (!me.active) {
+                expire(session, response)
+                false
+            } else {
+                updateUser(session, user, me)
+                true
+            }
+        } catch (ex: ApiException) {
+            markChecked(session)
+            if (ex.status == 401 || ex.status == 403) {
+                expire(session, response)
+                false
+            } else {
+                true
+            }
+        } catch (_: Exception) {
+            // Identity недоступна: не разлогиниваем всех из-за сетевой ошибки.
+            markChecked(session)
+            true
+        }
+    }
+
+    private fun isCheckDue(session: HttpSession): Boolean {
+        val checkedAt = session.getAttribute(SessionKeys.STATUS_CHECKED_AT) as? Long ?: return true
+        return System.currentTimeMillis() - checkedAt >= STATUS_CHECK_INTERVAL_MS
+    }
+
+    private fun markChecked(session: HttpSession) {
+        session.setAttribute(SessionKeys.STATUS_CHECKED_AT, System.currentTimeMillis())
+    }
+
+    private fun updateUser(
+        session: HttpSession,
+        user: SessionUser,
+        me: MeDto,
+    ) {
+        if (me.role == user.role && me.mustChangePassword == user.mustChangePassword) return
+        session.setAttribute(
+            SessionKeys.USER,
+            user.copy(role = me.role, mustChangePassword = me.mustChangePassword),
+        )
+    }
+
+    private fun expire(
+        session: HttpSession,
+        response: HttpServletResponse,
+    ) {
+        session.invalidate()
+        response.sendRedirect("/login?expired=1")
+    }
+
+    private companion object {
+        /** 30–60 секунд: достаточно быстро, чтобы закрыть доступ, и без запроса на каждую страницу. */
+        const val STATUS_CHECK_INTERVAL_MS = 45_000L
+    }
 }
diff --git a/web/src/main/kotlin/ru/ysu/lms/web/session/SessionUser.kt b/web/src/main/kotlin/ru/ysu/lms/web/session/SessionUser.kt
index e65ef44..a288926 100644
--- a/web/src/main/kotlin/ru/ysu/lms/web/session/SessionUser.kt
+++ b/web/src/main/kotlin/ru/ysu/lms/web/session/SessionUser.kt
@@ -15,4 +15,5 @@ data class SessionUser(
 object SessionKeys {
     const val TOKEN = "lms.token"
     const val USER = "lms.user"
+    const val STATUS_CHECKED_AT = "lms.statusCheckedAt"
 }
diff --git a/web/src/test/kotlin/ru/ysu/lms/web/session/AuthInterceptorTest.kt b/web/src/test/kotlin/ru/ysu/lms/web/session/AuthInterceptorTest.kt
new file mode 100644
index 0000000..bd49b19
--- /dev/null
+++ b/web/src/test/kotlin/ru/ysu/lms/web/session/AuthInterceptorTest.kt
@@ -0,0 +1,169 @@
+package ru.ysu.lms.web.session
+
+import io.mockk.every
+import io.mockk.mockk
+import io.mockk.verify
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.Test
+import org.springframework.mock.web.MockHttpSession
+import org.springframework.test.web.servlet.MockMvc
+import org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get
+import org.springframework.test.web.servlet.result.MockMvcResultMatchers.redirectedUrl
+import org.springframework.test.web.servlet.result.MockMvcResultMatchers.status
+import org.springframework.test.web.servlet.setup.MockMvcBuilders
+import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.RestController
+import ru.ysu.lms.web.api.ApiClient
+import ru.ysu.lms.web.api.ApiException
+import ru.ysu.lms.web.api.MeDto
+
+class AuthInterceptorTest {
+    @RestController
+    private class TestPage {
+        @GetMapping("/test")
+        fun page(): String = "ok"
+    }
+
+    private val api = mockk<ApiClient>()
+
+    private val mockMvc: MockMvc =
+        MockMvcBuilders
+            .standaloneSetup(TestPage())
+            .addInterceptors(AuthInterceptor(api))
+            .build()
+
+    @Test
+    fun `active session passes and caches check time`() {
+        every { api.me(TOKEN) } returns me(active = true)
+        val session = sessionFor()
+
+        mockMvc
+            .perform(get("/test").session(session))
+            .andExpect(status().isOk)
+
+        assertThat(session.getAttribute(SessionKeys.STATUS_CHECKED_AT)).isInstanceOf(Long::class.javaObjectType)
+        verify(exactly = 1) { api.me(TOKEN) }
+    }
+
+    @Test
+    fun `inactive account invalidates session and redirects to expired login`() {
+        every { api.me(TOKEN) } returns me(active = false)
+        val session = sessionFor()
+
+        mockMvc
+            .perform(get("/test").session(session))
+            .andExpect(status().is3xxRedirection)
+            .andExpect(redirectedUrl("/login?expired=1"))
+
+        assertThat(session.isInvalid).isTrue()
+    }
+
+    @Test
+    fun `expired or forbidden token invalidates session`() {
+        every { api.me(TOKEN) } throws ApiException(401, "Токен истёк")
+        val session = sessionFor()
+
+        mockMvc
+            .perform(get("/test").session(session))
+            .andExpect(status().is3xxRedirection)
+            .andExpect(redirectedUrl("/login?expired=1"))
+
+        assertThat(session.isInvalid).isTrue()
+    }
+
+    @Test
+    fun `fresh check timestamp skips identity call`() {
+        val session = sessionFor()
+        session.setAttribute(SessionKeys.STATUS_CHECKED_AT, System.currentTimeMillis())
+
+        mockMvc
+            .perform(get("/test").session(session))
+            .andExpect(status().isOk)
+
+        verify(exactly = 0) { api.me(any()) }
+    }
+
+    @Test
+    fun `stale check timestamp calls identity again`() {
+        every { api.me(TOKEN) } returns me(active = true)
+        val session = sessionFor()
+        session.setAttribute(SessionKeys.STATUS_CHECKED_AT, System.currentTimeMillis() - 60_000L)
+
+        mockMvc
+            .perform(get("/test").session(session))
+            .andExpect(status().isOk)
+
+        verify(exactly = 1) { api.me(TOKEN) }
+    }
+
+    @Test
+    fun `identity outage fails open and keeps session`() {
+        every { api.me(TOKEN) } throws ApiException(502, "Сервис недоступен")
+        val session = sessionFor()
+
+        mockMvc
+            .perform(get("/test").session(session))
+            .andExpect(status().isOk)
+
+        assertThat(session.isInvalid).isFalse()
+        assertThat(session.getAttribute(SessionKeys.STATUS_CHECKED_AT)).isInstanceOf(Long::class.javaObjectType)
+    }
+
+    @Test
+    fun `changed role and must change password are copied into session`() {
+        every { api.me(TOKEN) } returns me(active = true, role = "ADMIN", mustChangePassword = true)
+        val session = sessionFor(role = "STUDENT")
+
+        mockMvc
+            .perform(get("/test").session(session))
+            .andExpect(status().is3xxRedirection)
+            .andExpect(redirectedUrl("/change-password"))
+
+        val user = session.getAttribute(SessionKeys.USER) as SessionUser
+        assertThat(user.role).isEqualTo("ADMIN")
+        assertThat(user.mustChangePassword).isTrue()
+    }
+
+    @Test
+    fun `anonymous user is redirected to login`() {
+        mockMvc
+            .perform(get("/test"))
+            .andExpect(status().is3xxRedirection)
+            .andExpect(redirectedUrl("/login"))
+    }
+
+    private fun sessionFor(
+        role: String = "STUDENT",
+        mustChangePassword: Boolean = false,
+    ): MockHttpSession =
+        MockHttpSession().apply {
+            setAttribute(SessionKeys.TOKEN, TOKEN)
+            setAttribute(
+                SessionKeys.USER,
+                SessionUser(
+                    id = "test-id",
+                    login = "test-login",
+                    role = role,
+                    name = "Тестовый пользователь",
+                    mustChangePassword = mustChangePassword,
+                ),
+            )
+        }
+
+    private fun me(
+        active: Boolean,
+        role: String = "STUDENT",
+        mustChangePassword: Boolean = false,
+    ) = MeDto(
+        id = "test-id",
+        login = "test-login",
+        role = role,
+        name = "Тестовый пользователь",
+        mustChangePassword = mustChangePassword,
+        active = active,
+    )
+
+    private companion object {
+        const val TOKEN = "test-token"
+    }
+}