diff --git a/frontend/src/ASNsNewManager.jsx b/frontend/src/ASNsNewManager.jsx
index 4910d8a..41ccdc5 100644
--- a/frontend/src/ASNsNewManager.jsx
+++ b/frontend/src/ASNsNewManager.jsx
@@ -100,16 +100,23 @@ function ASNsNewManager() {
   const [wsUrl, setWsUrl] = useState('');
 
   useEffect(() => {
-    // Load WS URL once
+    const controller = new AbortController();
     (async () => {
-      try { const r = await api.get('/ws/url'); setWsUrl(String(r.data?.url || '')); } catch {}
+      try {
+        const r = await api.get('/ws/url', { signal: controller.signal });
+        setWsUrl(String(r.data?.url || ''));
+      } catch (e) {
+        if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
+      }
     })();
+    return () => controller.abort();
   }, []);
 
-  const fetchItems = async () => {
+  const fetchItems = async (abortSignal) => {
     setLoading(true);
+    const opts = abortSignal ? { signal: abortSignal } : {};
     try {
-      const response = await api.get(`/asns`, { params: { offset: 0, limit: 0, format: 'std' } });
+      const response = await api.get(`/asns`, { params: { offset: 0, limit: 0, format: 'std' }, ...opts });
       const payload = Array.isArray(response.data?.items) ? response.data.items : [];
       const mapped = payload.map(item => ({ asn: String(item.domain), community: String(item.type) }));
       const total = mapped.length;
@@ -122,6 +129,7 @@ function ASNsNewManager() {
       setContentLength(typeof lengthHeader !== 'undefined' ? Number(lengthHeader) : null);
       setError('');
     } catch (error) {
+      if (error?.name === 'CanceledError' || error?.name === 'AbortError' || error?.code === 'ERR_CANCELED') return;
       console.error('Error fetching ASNs:', error);
       setError('Не удалось загрузить список ASN. Проверьте, запущен ли бэкенд.');
     } finally {
@@ -129,7 +137,14 @@ function ASNsNewManager() {
     }
   };
 
-  useEffect(() => { if (!didInit.current) { didInit.current = true; fetchItems(); } }, []);
+  useEffect(() => {
+    if (!didInit.current) {
+      didInit.current = true;
+      const controller = new AbortController();
+      fetchItems(controller.signal);
+      return () => controller.abort();
+    }
+  }, []);
 
   const handleAddItem = (item) => {
     const asn = item?.asn || newItem.asn;
diff --git a/frontend/src/BillingManager.jsx b/frontend/src/BillingManager.jsx
index 88fbf6e..52e5e4e 100644
--- a/frontend/src/BillingManager.jsx
+++ b/frontend/src/BillingManager.jsx
@@ -113,9 +113,12 @@ function BillingManager() {
   });
 
   useEffect(() => {
-    fetchBillingData();
-    fetchExchangeRates();
-    fetchServers();
+    const controller = new AbortController();
+    const signal = controller.signal;
+    fetchBillingData(signal);
+    fetchExchangeRates(signal);
+    fetchServers(signal);
+    return () => controller.abort();
   }, []);
 
   // Автоматическая синхронизация: добавляем серверы без записей в биллинге
@@ -162,11 +165,12 @@ function BillingManager() {
   }, [servers, loading]);
 
 
-  const fetchExchangeRates = async () => {
+  const fetchExchangeRates = async (abortSignal) => {
     setRatesLoading(true);
+    const opts = abortSignal ? { signal: abortSignal } : {};
     try {
       // Основной источник: ЦБ РФ (base = RUB)
-      const cbr = await axios.get('https://www.cbr-xml-daily.ru/latest.js');
+      const cbr = await axios.get('https://www.cbr-xml-daily.ru/latest.js', opts);
       const rubPerUsd = cbr.data && cbr.data.rates?.USD ? 1 / Number(cbr.data.rates.USD) : null;
       const rubPerEur = cbr.data && cbr.data.rates?.EUR ? 1 / Number(cbr.data.rates.EUR) : null;
 
@@ -180,12 +184,13 @@ function BillingManager() {
         return;
       }
     } catch (error) {
+      if (error?.name === 'CanceledError' || error?.name === 'AbortError' || error?.code === 'ERR_CANCELED') return;
       console.warn('ЦБ недоступен, пробуем резервный источник:', error?.message);
     }
 
     try {
       // Резервный источник: open.er-api
-      const response = await axios.get('https://open.er-api.com/v6/latest/USD');
+      const response = await axios.get('https://open.er-api.com/v6/latest/USD', opts);
       const rates = response.data?.rates || {};
       setExchangeRates({
         USD: 1,
@@ -193,6 +198,7 @@ function BillingManager() {
         RUB: rates.RUB || 1
       });
     } catch (error) {
+      if (error?.name === 'CanceledError' || error?.name === 'AbortError' || error?.code === 'ERR_CANCELED') return;
       console.error('Ошибка при загрузке курсов валют:', error);
       // Фолбек на разумные значения
       setExchangeRates({ USD: 1, EUR: 1.05, RUB: 95 });
@@ -201,19 +207,22 @@ function BillingManager() {
     }
   };
 
-  const fetchServers = async () => {
+  const fetchServers = async (abortSignal) => {
+    const opts = abortSignal ? { signal: abortSignal } : {};
     try {
-      const res = await api.get(`/servers`);
+      const res = await api.get(`/servers`, opts);
       setServers(Array.isArray(res.data) ? res.data : []);
     } catch (error) {
+      if (error?.name === 'CanceledError' || error?.name === 'AbortError' || error?.code === 'ERR_CANCELED') return;
       console.error('Ошибка при загрузке серверов:', error);
     }
   };
 
-  const fetchBillingData = async () => {
+  const fetchBillingData = async (abortSignal) => {
     setLoading(true);
+    const opts = abortSignal ? { signal: abortSignal } : {};
     try {
-      const response = await api.get(`/billing`);
+      const response = await api.get(`/billing`, opts);
       const rates = exchangeRates; // из closure, на первой загрузке может быть {1,1,1} — для USD достаточно
       const toRUB = (amt, ccy) => {
         if (!amt) return 0;
@@ -251,6 +260,7 @@ function BillingManager() {
       setBillingData(normalized);
       setError('');
     } catch (err) {
+      if (err?.name === 'CanceledError' || err?.name === 'AbortError' || err?.code === 'ERR_CANCELED') return;
       console.error('Ошибка при загрузке данных биллинга:', err);
       setError('Ошибка при загрузке данных');
       setBillingData([]);
diff --git a/frontend/src/Dashboard.jsx b/frontend/src/Dashboard.jsx
index ad029a8..a4cde87 100644
--- a/frontend/src/Dashboard.jsx
+++ b/frontend/src/Dashboard.jsx
@@ -202,18 +202,21 @@ function Dashboard() {
   const [expandedPingId, setExpandedPingId] = useState(null);
 
   useEffect(() => {
+    const controller = new AbortController();
+    const signal = controller.signal;
+
     async function fetchStats() {
       setLoading(true);
       setError(null);
       try {
-        // Загружаем данные с обработкой ошибок для каждого endpoint
+        const opts = { signal };
         const results = await Promise.allSettled([
-          api.get('/domains-new', { params: { countOnly: true } }),
-          api.get('/ip-ranges', { params: { countOnly: true } }),
-          api.get('/asns', { params: { countOnly: true } }),
-          api.get('/servers'),
-          api.get('/servers/availability', { params: { ttlSeconds: 60 } }),
-          api.get('/s3/last-modified')
+          api.get('/domains-new', { params: { countOnly: true }, ...opts }),
+          api.get('/ip-ranges', { params: { countOnly: true }, ...opts }),
+          api.get('/asns', { params: { countOnly: true }, ...opts }),
+          api.get('/servers', opts),
+          api.get('/servers/availability', { params: { ttlSeconds: 60 }, ...opts }),
+          api.get('/s3/last-modified', opts)
         ]);
 
         // Обрабатываем результаты
@@ -278,6 +281,7 @@ function Dashboard() {
           console.warn('Некоторые API недоступны:', errors.map(e => e.reason?.message));
         }
       } catch (e) {
+        if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
         console.error('Критическая ошибка загрузки статистики:', e);
         setError('Не удалось загрузить статистику');
         setStats({
@@ -296,23 +300,26 @@ function Dashboard() {
       }
     }
     fetchStats();
+    return () => controller.abort();
   }, []);
 
   useEffect(() => {
-    let cancelled = false;
-    api.get('/ping-services-list')
+    const controller = new AbortController();
+    api.get('/ping-services-list', { signal: controller.signal })
       .then(({ data }) => {
-        if (!cancelled && Array.isArray(data?.list)) setPingServicesConfig(data.list);
+        if (Array.isArray(data?.list)) setPingServicesConfig(data.list);
       })
-      .catch(() => {
-        if (!cancelled) setPingServicesConfig([]);
+      .catch((e) => {
+        if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
+        setPingServicesConfig([]);
       });
-    return () => { cancelled = true; };
+    return () => controller.abort();
   }, []);
 
-  function fetchPingServices(forceRefresh = false) {
+  function fetchPingServices(forceRefresh = false, abortSignal) {
     setPingLoading(true);
-    api.get('/ping-services', { params: forceRefresh ? { refresh: 1 } : {} })
+    const opts = abortSignal ? { signal: abortSignal } : {};
+    api.get('/ping-services', { params: forceRefresh ? { refresh: 1 } : {}, ...opts })
       .then(({ data }) => {
         if (!data || typeof data !== 'object') return;
         const byId = data.byId ?? data;
@@ -320,12 +327,17 @@ function Dashboard() {
         setPingServices(byId);
         setPingHistory(typeof history === 'object' ? history : {});
       })
-      .catch(() => setPingServices(null))
+      .catch((e) => {
+        if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
+        setPingServices(null);
+      })
       .finally(() => setPingLoading(false));
   }
 
   useEffect(() => {
-    fetchPingServices();
+    const controller = new AbortController();
+    fetchPingServices(false, controller.signal);
+    return () => controller.abort();
   }, []);
 
   if (error) {
diff --git a/frontend/src/DomainsNewManager.jsx b/frontend/src/DomainsNewManager.jsx
index f50c181..19e78d3 100644
--- a/frontend/src/DomainsNewManager.jsx
+++ b/frontend/src/DomainsNewManager.jsx
@@ -86,14 +86,25 @@ function DomainsNewManager() {
   // Справочник community для подсказок
   const [communities, setCommunities] = useState([]);
   useEffect(() => {
+    const controller = new AbortController();
+    const signal = controller.signal;
     (async () => {
       try {
-        const res = await api.get(`/communities`);
+        const res = await api.get(`/communities`, { signal });
         setCommunities(Array.isArray(res.data) ? res.data : []);
       } catch (e) {
-        // тихо игнорируем
+        if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
       }
     })();
+    (async () => {
+      try {
+        const r = await api.get('/ws/url', { signal });
+        setWsUrl(String(r.data?.url || ''));
+      } catch (e) {
+        if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
+      }
+    })();
+    return () => controller.abort();
   }, []);
 
   const renderCommunityBadge = (value) => (<CommunityBadge value={value} communities={communities} />);
@@ -110,14 +121,11 @@ function DomainsNewManager() {
   const [wsOpen, setWsOpen] = useState(false);
   const [wsUrl, setWsUrl] = useState('');
 
-  useEffect(() => {
-    (async () => { try { const r = await api.get('/ws/url'); setWsUrl(String(r.data?.url || '')); } catch {} })();
-  }, []);
-
-  const fetchItems = async () => {
+  const fetchItems = async (abortSignal) => {
     setLoading(true);
+    const opts = abortSignal ? { signal: abortSignal } : {};
     try {
-      const response = await api.get(`/domains-new`, { params: { offset: 0, limit: 0, format: 'std' } });
+      const response = await api.get(`/domains-new`, { params: { offset: 0, limit: 0, format: 'std' }, ...opts });
       const payload = Array.isArray(response.data?.items) ? response.data.items : [];
       const total = payload.length;
       setItems(payload);
@@ -129,6 +137,7 @@ function DomainsNewManager() {
       setContentLength(typeof lengthHeader !== 'undefined' ? Number(lengthHeader) : null);
       setError('');
     } catch (error) {
+      if (error?.name === 'CanceledError' || error?.name === 'AbortError' || error?.code === 'ERR_CANCELED') return;
       console.error('Error fetching domains-new:', error);
       setError('Не удалось загрузить домены. Проверьте, запущен ли бэкенд.');
     } finally {
@@ -136,8 +145,14 @@ function DomainsNewManager() {
     }
   };
 
-  // Подгрузка при изменении страницы/поиска/фильтра
-  useEffect(() => { if (!didInit.current) { didInit.current = true; fetchItems(); } }, []);
+  useEffect(() => {
+    if (!didInit.current) {
+      didInit.current = true;
+      const controller = new AbortController();
+      fetchItems(controller.signal);
+      return () => controller.abort();
+    }
+  }, []);
 
   const handleAddItem = (item) => {
     // Если item передан (из модалки), используем его, иначе из state (старый способ)
diff --git a/frontend/src/EasySwitchManager.jsx b/frontend/src/EasySwitchManager.jsx
index 558cfd3..6ebb9a6 100644
--- a/frontend/src/EasySwitchManager.jsx
+++ b/frontend/src/EasySwitchManager.jsx
@@ -57,39 +57,46 @@ function EasySwitchManager() {
   const location = useLocation();
 
   useEffect(() => {
+    const controller = new AbortController();
+    const signal = controller.signal;
+
     const initData = async () => {
       try {
         // Загружаем communities
-        const commRes = await api.get(`/communities`);
+        const commRes = await api.get(`/communities`, { signal });
         const communities = Array.isArray(commRes.data) ? commRes.data : [];
         setCommunitiesDirectory(communities);
-        
+
         // Загружаем inventory servers
-        const invRes = await api.get(`/servers`);
+        const invRes = await api.get(`/servers`, { signal });
         const inventory = Array.isArray(invRes.data) ? invRes.data : [];
         setInventoryServers(inventory);
 
         // Загружаем network-config (gateways и туннели)
         let ncGateways = [];
         try {
-          const ncRes = await api.get(`/network-config`);
+          const ncRes = await api.get(`/network-config`, { signal });
           const ncData = ncRes.data || {};
           ncGateways = Array.isArray(ncData.gateways) ? ncData.gateways : [];
         } catch (e) {
+          if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
           // Если файла нет или ошибка - используем пустой массив (fallback на старую логику)
           console.warn('EasySwitch: не удалось загрузить /network-config, используется fallback:', e?.message || e);
           ncGateways = [];
         }
         setNetworkConfigGateways(ncGateways);
-        
+
         // Загружаем данные серверов и фильтров
-        await loadDataWithParams(communities, inventory, ncGateways);
+        await loadDataWithParams(communities, inventory, ncGateways, signal);
       } catch (e) {
+        if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
         console.error('Error initializing data:', e);
         setError('Ошибка загрузки данных');
       }
     };
     initData();
+
+    return () => controller.abort();
   }, []);
 
   // При переходе на раздел Easy Switch перезапрашиваем пинги (устаревшие по TTL обновятся)
@@ -111,21 +118,23 @@ function EasySwitchManager() {
     requestPings(pingTasks);
   }, [location.pathname, servers, inventoryServers, requestPings]);
 
-  const loadDataWithParams = async (communities, inventory, ncGatewaysParam) => {
+  const loadDataWithParams = async (communities, inventory, ncGatewaysParam, signal) => {
     setLoading(true);
     setError('');
-    
+
+    const requestConfig = signal ? { signal } : {};
+
     try {
       // Загружаем список серверов из server-configs
-      const serversResponse = await api.get(`/server-configs`);
+      const serversResponse = await api.get(`/server-configs`, requestConfig);
       const serversList = Array.isArray(serversResponse.data) ? serversResponse.data : [];
-      
+
       // Загружаем фильтры для каждого сервера (для определения активных gateways)
       const serversWithData = await Promise.all(
         serversList.map(async (server) => {
           try {
             // Загружаем filters для сервера
-            const filtersResponse = await api.get(`/server-filters/${server.id}`);
+            const filtersResponse = await api.get(`/server-filters/${server.id}`, requestConfig);
             const filters = Array.isArray(filtersResponse.data) ? filtersResponse.data : [];
             
             // Получаем gateways сервера:
@@ -283,6 +292,7 @@ function EasySwitchManager() {
       } catch (_) {}
       
     } catch (err) {
+      if (err?.name === 'CanceledError' || err?.name === 'AbortError' || err?.code === 'ERR_CANCELED') return;
       console.error('Error loading data:', err);
       setError('Ошибка загрузки данных. Проверьте подключение к серверу.');
     } finally {
diff --git a/frontend/src/FilterManager.jsx b/frontend/src/FilterManager.jsx
index e628969..679bed9 100644
--- a/frontend/src/FilterManager.jsx
+++ b/frontend/src/FilterManager.jsx
@@ -896,47 +896,51 @@ function FilterManager() {
   }, [location.pathname, selectedServer, selectedServerGateways, requestPings]);
 
   useEffect(() => {
-    // Загружаем базовую AS из настроек
+    const controller = new AbortController();
+    const signal = controller.signal;
+    const opts = { signal };
+
     (async () => {
       try {
-        const res = await api.get('/ui-settings');
+        const res = await api.get('/ui-settings', opts);
         const data = res?.data || {};
         const loadedBaseAS = String(data?.baseAS || '65001');
         setBaseAS(loadedBaseAS);
       } catch (e) {
-        // мягко игнорируем, используем значение по умолчанию
+        if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
       }
     })();
-    
+
     (async () => {
       try {
-        const res = await api.get(`/communities`);
+        const res = await api.get(`/communities`, opts);
         setCommunities(Array.isArray(res.data) ? res.data : []);
       } catch (e) {
-        // мягко игнорируем, автокомплит необязателен
+        if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
       }
     })();
-    // Загружаем инвентарь серверов для отображения флагов и IP
+
     (async () => {
       try {
-        const res = await api.get(`/servers`);
+        const res = await api.get(`/servers`, opts);
         setInventoryServers(Array.isArray(res.data) ? res.data : []);
       } catch (e) {
-        // мягко игнорируем, дополнительная информация необязательна
+        if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
       }
     })();
-    
-    // Загружаем gateways из NetworkConfigManager
+
     (async () => {
       try {
-        const res = await api.get(`/network-config`);
+        const res = await api.get(`/network-config`, opts);
         const networkConfig = res.data || {};
         setNetworkConfigGateways(Array.isArray(networkConfig.gateways) ? networkConfig.gateways : []);
       } catch (e) {
-        // Если файла нет или ошибка - используем пустой массив (fallback на старую логику)
+        if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
         setNetworkConfigGateways([]);
       }
     })();
+
+    return () => controller.abort();
   }, []);
 
   const filterKey = (f) => {
@@ -945,7 +949,9 @@ function FilterManager() {
   };
 
   useEffect(() => {
-    fetchServers();
+    const controller = new AbortController();
+    fetchServers(controller.signal);
+    return () => controller.abort();
   }, []);
 
   // Загружаем фильтры при выборе сервера
@@ -1003,11 +1009,12 @@ function FilterManager() {
   // Функции для управления серверами
   // Загружаем jumphost'ы из раздела "Серверы" (/api/servers)
   // + загружаем старые server-configs для маппинга legacyId
-  const fetchServers = async () => {
+  const fetchServers = async (abortSignal) => {
+    const opts = abortSignal ? { signal: abortSignal } : {};
     try {
       const [serversRes, legacyRes] = await Promise.all([
-        api.get(`/servers`),
-        api.get(`/server-configs`).catch(() => ({ data: [] })) // Старые конфиги для маппинга
+        api.get(`/servers`, opts),
+        api.get(`/server-configs`, opts).catch(() => ({ data: [] })) // Старые конфиги для маппинга
       ]);
       
       const allServers = Array.isArray(serversRes.data) ? serversRes.data : [];
@@ -1064,6 +1071,7 @@ function FilterManager() {
       
       setServers(jumphosts);
     } catch (error) {
+      if (error?.name === 'CanceledError' || error?.name === 'AbortError' || error?.code === 'ERR_CANCELED') return;
       console.error('Error fetching servers:', error);
       setServers([]);
     }
diff --git a/frontend/src/IPRangesManager.jsx b/frontend/src/IPRangesManager.jsx
index 8c7727e..5701671 100644
--- a/frontend/src/IPRangesManager.jsx
+++ b/frontend/src/IPRangesManager.jsx
@@ -114,13 +114,23 @@ function IPRangesManager() {
   const [wsUrl, setWsUrl] = useState('');
 
   useEffect(() => {
-    (async () => { try { const r = await api.get('/ws/url'); setWsUrl(String(r.data?.url || '')); } catch {} })();
+    const controller = new AbortController();
+    (async () => {
+      try {
+        const r = await api.get('/ws/url', { signal: controller.signal });
+        setWsUrl(String(r.data?.url || ''));
+      } catch (e) {
+        if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
+      }
+    })();
+    return () => controller.abort();
   }, []);
 
-  const fetchItems = async () => {
+  const fetchItems = async (abortSignal) => {
     setLoading(true);
+    const opts = abortSignal ? { signal: abortSignal } : {};
     try {
-      const response = await api.get(`/ip-ranges`, { params: { offset: 0, limit: 0, format: 'std' } });
+      const response = await api.get(`/ip-ranges`, { params: { offset: 0, limit: 0, format: 'std' }, ...opts });
       const payload = Array.isArray(response.data?.items) ? response.data.items : [];
       const total = payload.length;
       setItems(payload);
@@ -132,6 +142,7 @@ function IPRangesManager() {
       setContentLength(typeof lengthHeader !== 'undefined' ? Number(lengthHeader) : null);
       setError('');
     } catch (error) {
+      if (error?.name === 'CanceledError' || error?.name === 'AbortError' || error?.code === 'ERR_CANCELED') return;
       console.error('Error fetching ip-ranges:', error);
       setError('Не удалось загрузить IP-диапазоны. Проверьте, запущен ли бэкенд.');
     } finally {
@@ -139,7 +150,14 @@ function IPRangesManager() {
     }
   };
 
-  useEffect(() => { if (!didInit.current) { didInit.current = true; fetchItems(); } }, []);
+  useEffect(() => {
+    if (!didInit.current) {
+      didInit.current = true;
+      const controller = new AbortController();
+      fetchItems(controller.signal);
+      return () => controller.abort();
+    }
+  }, []);
 
   const handleAddItem = (item) => {
     const ipRange = item?.ipRange || newItem.ipRange;
diff --git a/frontend/src/InterfaceSpeedTest.jsx b/frontend/src/InterfaceSpeedTest.jsx
index a3a2aea..6cee9cf 100644
--- a/frontend/src/InterfaceSpeedTest.jsx
+++ b/frontend/src/InterfaceSpeedTest.jsx
@@ -30,13 +30,16 @@ export default function InterfaceSpeedTest() {
   });
 
   useEffect(() => {
+    const controller = new AbortController();
+    const signal = controller.signal;
+
     const load = async () => {
       setLoading(true);
       try {
         const [serversRes, netRes, uiRes] = await Promise.all([
-          api.get('/servers'),
-          api.get('/network-config').catch(() => ({ data: null })),
-          api.get('/ui-settings').catch(() => ({ data: {} })),
+          api.get('/servers', { signal }),
+          api.get('/network-config', { signal }).catch(() => ({ data: null })),
+          api.get('/ui-settings', { signal }).catch(() => ({ data: {} })),
         ]);
 
         setServers(Array.isArray(serversRes?.data) ? serversRes.data : []);
@@ -69,6 +72,7 @@ export default function InterfaceSpeedTest() {
           cacheMinutes,
         });
       } catch (e) {
+        if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
         console.error('[InterfaceSpeedTest] load failed', e);
         notify.error('Не удалось загрузить данные для замера скорости');
       } finally {
@@ -76,6 +80,7 @@ export default function InterfaceSpeedTest() {
       }
     };
     load();
+    return () => controller.abort();
   }, [notify]);
 
   const gateways = useMemo(
diff --git a/frontend/src/MikrotikBackupsManager.jsx b/frontend/src/MikrotikBackupsManager.jsx
index 14f1ff9..44b666b 100644
--- a/frontend/src/MikrotikBackupsManager.jsx
+++ b/frontend/src/MikrotikBackupsManager.jsx
@@ -157,13 +157,18 @@ function MikrotikBackupsManager() {
   const backupPageSize = 10;
 
   useEffect(() => {
-    fetchServers();
-    fetchUiSettings();
+    const controller = new AbortController();
+    const signal = controller.signal;
+    fetchServers(signal);
+    fetchUiSettings(signal);
+    return () => controller.abort();
   }, []);
 
   useEffect(() => {
     if (selectedServerId) {
-      fetchBackups(selectedServerId);
+      const controller = new AbortController();
+      fetchBackups(selectedServerId, controller.signal);
+      return () => controller.abort();
     } else {
       setBackups([]);
       setSelectedKeys([]);
@@ -314,10 +319,11 @@ function MikrotikBackupsManager() {
     setBackupServerIds(new Set());
   };
 
-  const fetchServers = async () => {
+  const fetchServers = async (abortSignal) => {
+    const opts = abortSignal ? { signal: abortSignal } : {};
     try {
       setLoadingServers(true);
-      const res = await api.get('/servers');
+      const res = await api.get('/servers', opts);
       const list = Array.isArray(res.data) ? res.data : [];
       setServers(list);
       const firstJumphost = list.find((s) => String(s.type || '').toLowerCase() === 'jumphost');
@@ -325,6 +331,7 @@ function MikrotikBackupsManager() {
         setSelectedServerId(makeServerId(firstJumphost));
       }
     } catch (err) {
+      if (err?.name === 'CanceledError' || err?.name === 'AbortError' || err?.code === 'ERR_CANCELED') return;
       console.error('Error fetching servers for backups:', err);
       notify.error('Не удалось загрузить список серверов для бэкапов');
     } finally {
@@ -332,9 +339,10 @@ function MikrotikBackupsManager() {
     }
   };
 
-  const fetchUiSettings = async () => {
+  const fetchUiSettings = async (abortSignal) => {
+    const opts = abortSignal ? { signal: abortSignal } : {};
     try {
-      const res = await api.get('/ui-settings');
+      const res = await api.get('/ui-settings', opts);
       const data = res?.data || {};
       setUiSettings(data);
       const list = Array.isArray(data.mikrotikBackupServers) ? data.mikrotikBackupServers : [];
@@ -342,21 +350,23 @@ function MikrotikBackupsManager() {
       const e = res?.headers?.etag || res?.headers?.ETag || '';
       setUiSettingsEtag(e ? String(e) : '');
     } catch (err) {
+      if (err?.name === 'CanceledError' || err?.name === 'AbortError' || err?.code === 'ERR_CANCELED') return;
       console.error('Error fetching UI settings for backups:', err);
-      // мягко игнорируем, просто будут дефолты
     }
   };
 
-  const fetchBackups = async (serverId) => {
+  const fetchBackups = async (serverId, abortSignal) => {
     if (!serverId) return;
+    const opts = abortSignal ? { signal: abortSignal } : {};
     try {
       setLoadingBackups(true);
       setSelectedKeys([]);
       setDiffResult(null);
-      const res = await api.get('/mikrotik/backups', { params: { serverId } });
+      const res = await api.get('/mikrotik/backups', { params: { serverId }, ...opts });
       const items = res.data?.items || [];
       setBackups(items);
     } catch (err) {
+      if (err?.name === 'CanceledError' || err?.name === 'AbortError' || err?.code === 'ERR_CANCELED') return;
       console.error('Error fetching backups:', err);
       notify.error('Не удалось загрузить список бэкапов MikroTik');
     } finally {
diff --git a/frontend/src/NetworkMapDashboard.jsx b/frontend/src/NetworkMapDashboard.jsx
index 9b5c0fc..1b06533 100644
--- a/frontend/src/NetworkMapDashboard.jsx
+++ b/frontend/src/NetworkMapDashboard.jsx
@@ -86,16 +86,17 @@ export default function NetworkMapDashboard() {
   const cacheAppliedAtRef = useRef(null);
 
   /** Связи строятся из интерфейсов раздела «Сетевые настройки» (/network-config), tunnelInterfaces */
-  const fetchData = useCallback(async () => {
+  const fetchData = useCallback(async (abortSignal) => {
     setLoading(true);
     setError(null);
     cacheAppliedAtRef.current = null;
+    const opts = abortSignal ? { signal: abortSignal } : {};
     try {
       const [serversRes, configRes, uiSettingsRes, cacheRes] = await Promise.all([
-        api.get('/servers'),
-        api.get('/network-config').catch(() => ({ data: null })),
-        api.get('/ui-settings').catch(() => ({ data: {} })),
-        api.get('/network-map-cache').catch(() => ({ data: {} })),
+        api.get('/servers', opts),
+        api.get('/network-config', opts).catch(() => ({ data: null })),
+        api.get('/ui-settings', opts).catch(() => ({ data: {} })),
+        api.get('/network-map-cache', opts).catch(() => ({ data: {} })),
       ]);
       const serversList = Array.isArray(serversRes?.data) ? serversRes.data : [];
       const config = configRes?.data || {};
@@ -181,6 +182,7 @@ export default function NetworkMapDashboard() {
         setSpeedStaleMap({});
       }
     } catch (e) {
+      if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
       console.error('NetworkMap fetch:', e);
       setError(e?.response?.data?.message || e?.message || 'Не удалось загрузить данные');
       setServers([]);
@@ -342,7 +344,9 @@ export default function NetworkMapDashboard() {
   }, [connections]);
 
   useEffect(() => {
-    fetchData();
+    const controller = new AbortController();
+    fetchData(controller.signal);
+    return () => controller.abort();
   }, [fetchData]);
 
   // Пинг и скорость не запускаются автоматически при открытии карты (даже если кеш просрочен).
diff --git a/frontend/src/NetworkMapSchedulerPage.jsx b/frontend/src/NetworkMapSchedulerPage.jsx
index 9981f9c..494b8a9 100644
--- a/frontend/src/NetworkMapSchedulerPage.jsx
+++ b/frontend/src/NetworkMapSchedulerPage.jsx
@@ -33,9 +33,10 @@ export default function NetworkMapSchedulerPage() {
   const logContainerRef = useRef(null);
   const [autoScroll, setAutoScroll] = useState(true);
 
-  const fetchSettings = useCallback(async () => {
+  const fetchSettings = useCallback(async (abortSignal) => {
     try {
-      const { data } = await api.get('/scheduler/network-map/settings');
+      const opts = abortSignal ? { signal: abortSignal } : {};
+      const { data } = await api.get('/scheduler/network-map/settings', opts);
       setSettings({
         enabled: Boolean(data.enabled),
         intervalMinutes: Math.max(INTERVAL_MIN, Math.min(INTERVAL_MAX, Number(data.intervalMinutes) || 5)),
@@ -45,6 +46,7 @@ export default function NetworkMapSchedulerPage() {
       });
       setNextRunAt(typeof data.nextRunAt === 'number' ? data.nextRunAt : null);
     } catch (e) {
+      if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
       setError(e?.response?.data?.message || e?.message || 'Не удалось загрузить настройки');
     }
   }, []);
@@ -59,13 +61,13 @@ export default function NetworkMapSchedulerPage() {
   }, []);
 
   useEffect(() => {
-    let cancelled = false;
+    const controller = new AbortController();
     (async () => {
       setLoading(true);
-      await fetchSettings();
-      if (!cancelled) setLoading(false);
+      await fetchSettings(controller.signal);
+      setLoading(false);
     })();
-    return () => { cancelled = true; };
+    return () => controller.abort();
   }, [fetchSettings]);
 
   useEffect(() => {
diff --git a/frontend/src/PingServicesManager.jsx b/frontend/src/PingServicesManager.jsx
index 10961cd..218dd98 100644
--- a/frontend/src/PingServicesManager.jsx
+++ b/frontend/src/PingServicesManager.jsx
@@ -58,11 +58,12 @@ export default function PingServicesManager() {
   const [editingItem, setEditingItem] = useState(null);
   const [editDraft, setEditDraft] = useState({ id: '', name: '', host: '', port: '443', icon: 'IconBrandGoogle', color: 'blue' });
 
-  const loadSettings = async () => {
+  const loadSettings = async (abortSignal) => {
     setLoading(true);
     setError('');
+    const opts = abortSignal ? { signal: abortSignal } : {};
     try {
-      const res = await api.get('/ui-settings');
+      const res = await api.get('/ui-settings', opts);
       const data = res?.data || {};
       setRawSettings(data);
       setEtag(String(res?.headers?.etag || res?.headers?.ETag || ''));
@@ -76,6 +77,7 @@ export default function PingServicesManager() {
         color: typeof s?.color === 'string' ? s.color : 'primary',
       })).filter((s) => s.host));
     } catch (e) {
+      if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
       console.error(e);
       setError('Не удалось загрузить настройки');
     } finally {
@@ -84,7 +86,9 @@ export default function PingServicesManager() {
   };
 
   useEffect(() => {
-    loadSettings();
+    const controller = new AbortController();
+    loadSettings(controller.signal);
+    return () => controller.abort();
   }, []);
 
   const saveSettings = async () => {
diff --git a/frontend/src/ResourceStatsPage.jsx b/frontend/src/ResourceStatsPage.jsx
index e5f0524..b2ff8d0 100644
--- a/frontend/src/ResourceStatsPage.jsx
+++ b/frontend/src/ResourceStatsPage.jsx
@@ -146,14 +146,16 @@ export default function ResourceStatsPage() {
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState(null);
 
-  const fetchStats = useCallback(async () => {
+  const fetchStats = useCallback(async (abortSignal) => {
     setLoading(true);
     setError(null);
+    const opts = abortSignal ? { signal: abortSignal } : {};
     try {
-      const res = await api.get('/resources/stats');
+      const res = await api.get('/resources/stats', opts);
       const data = res?.data;
       setRouters(Array.isArray(data?.routers) ? data.routers : []);
     } catch (e) {
+      if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
       setError(e?.response?.data?.message || e?.message || 'Не удалось загрузить статистику');
       setRouters([]);
     } finally {
@@ -162,7 +164,9 @@ export default function ResourceStatsPage() {
   }, []);
 
   useEffect(() => {
-    fetchStats();
+    const controller = new AbortController();
+    fetchStats(controller.signal);
+    return () => controller.abort();
   }, [fetchStats]);
 
   return (
diff --git a/frontend/src/ServerManager.jsx b/frontend/src/ServerManager.jsx
index 3bc6cb4..02dcce0 100644
--- a/frontend/src/ServerManager.jsx
+++ b/frontend/src/ServerManager.jsx
@@ -127,21 +127,26 @@ function ServerManager() {
   };
 
   // === Загрузка данных ===
-  const fetchNetworkConfig = async () => {
+  const fetchNetworkConfig = async (abortSignal) => {
+    const opts = abortSignal ? { signal: abortSignal } : {};
     try {
-      const res = await api.get('/network-config');
+      const res = await api.get('/network-config', opts);
       const config = res.data || {};
       setNetworkConfigGateways(Array.isArray(config.gateways) ? config.gateways : []);
     } catch (e) {
+      if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
       console.warn('Network config not loaded:', e?.message || e);
       setNetworkConfigGateways([]);
     }
   };
 
   useEffect(() => {
-    fetchServers();
-    fetchConnections();
-    fetchNetworkConfig();
+    const controller = new AbortController();
+    const signal = controller.signal;
+    fetchServers(signal);
+    fetchConnections(signal);
+    fetchNetworkConfig(signal);
+    return () => controller.abort();
   }, []);
 
   useEffect(() => {
@@ -156,10 +161,11 @@ function ServerManager() {
     }
   }, []);
 
-  const fetchServers = async () => {
+  const fetchServers = async (abortSignal) => {
     setLoading(true);
+    const opts = abortSignal ? { signal: abortSignal } : {};
     try {
-      const response = await api.get(`/servers`);
+      const response = await api.get(`/servers`, opts);
       const normalized = (Array.isArray(response.data) ? response.data : []).map((srv) => ({
         ...srv,
         type: normalizeServerType(srv.type),
@@ -167,6 +173,7 @@ function ServerManager() {
       }));
       setServers(normalized);
     } catch (error) {
+      if (error?.name === 'CanceledError' || error?.name === 'AbortError' || error?.code === 'ERR_CANCELED') return;
       console.error('Error fetching servers:', error);
       notify.error('Не удалось загрузить серверы. Проверьте, запущен ли бэкенд.');
     } finally {
@@ -174,15 +181,17 @@ function ServerManager() {
     }
   };
 
-  const fetchConnections = async () => {
+  const fetchConnections = async (abortSignal) => {
+    const opts = abortSignal ? { signal: abortSignal } : {};
     try {
-      const response = await api.get(`/server-connections`);
+      const response = await api.get(`/server-connections`, opts);
       if (Array.isArray(response.data)) {
         setConnections(response.data);
       } else {
         setConnections([]);
       }
     } catch (error) {
+      if (error?.name === 'CanceledError' || error?.name === 'AbortError' || error?.code === 'ERR_CANCELED') return;
       console.error('Error fetching server connections:', error);
     }
   };
diff --git a/frontend/src/TrafficDashboard.jsx b/frontend/src/TrafficDashboard.jsx
index d33dd23..114f60d 100644
--- a/frontend/src/TrafficDashboard.jsx
+++ b/frontend/src/TrafficDashboard.jsx
@@ -181,18 +181,20 @@ export default function TrafficDashboard() {
 
   const interfaceFilter = getTrafficInterfaceFilter(uiSettings);
 
-  const fetchStats = useCallback(async () => {
+  const fetchStats = useCallback(async (abortSignal) => {
     setLoading(true);
     setError(null);
+    const opts = abortSignal ? { signal: abortSignal } : {};
     try {
       const [statsRes, settingsRes] = await Promise.all([
-        api.get('/traffic/interface-stats'),
-        api.get('/ui-settings').catch(() => ({ data: {} })),
+        api.get('/traffic/interface-stats', opts),
+        api.get('/ui-settings', opts).catch(() => ({ data: {} })),
       ]);
       const data = statsRes?.data || {};
       setJumphosts(Array.isArray(data?.jumphosts) ? data.jumphosts : []);
       setUiSettings(settingsRes?.data || {});
     } catch (e) {
+      if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
       console.error('Traffic stats:', e);
       setError(e?.response?.data?.message || e?.message || 'Не удалось загрузить статистику');
       setJumphosts([]);
@@ -202,7 +204,9 @@ export default function TrafficDashboard() {
   }, []);
 
   useEffect(() => {
-    fetchStats();
+    const controller = new AbortController();
+    fetchStats(controller.signal);
+    return () => controller.abort();
   }, [fetchStats]);
 
   const filteredJumphosts = useMemo(() => {
diff --git a/frontend/src/UptimeMonitorPage.jsx b/frontend/src/UptimeMonitorPage.jsx
index cf3da16..4268243 100644
--- a/frontend/src/UptimeMonitorPage.jsx
+++ b/frontend/src/UptimeMonitorPage.jsx
@@ -103,13 +103,16 @@ export default function UptimeMonitorPage() {
     [servers]
   );
 
-  const fetchServers = useCallback(async () => {
+  const controllerRef = useRef(null);
+
+  const fetchServers = useCallback(async (abortSignal) => {
     setLoading(true);
     setError(null);
+    const opts = abortSignal ? { signal: abortSignal } : {};
     try {
       const [serversRes, settingsRes] = await Promise.all([
-        api.get('/servers'),
-        api.get('/ui-settings').catch(() => ({ data: {} })),
+        api.get('/servers', opts),
+        api.get('/ui-settings', opts).catch(() => ({ data: {} })),
       ]);
       const data = serversRes?.data;
       setServers(Array.isArray(data) ? data : []);
@@ -117,6 +120,7 @@ export default function UptimeMonitorPage() {
       const interval = Math.max(30, Math.min(86400, parseInt(ui.uptimeMonitorIntervalSeconds, 10) || DEFAULT_CHECK_INTERVAL_SEC));
       setCheckIntervalSeconds(interval);
     } catch (e) {
+      if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
       setError(e?.response?.data?.message || e?.message || 'Не удалось загрузить серверы');
       setServers([]);
     } finally {
@@ -125,19 +129,29 @@ export default function UptimeMonitorPage() {
   }, []);
 
   useEffect(() => {
-    fetchServers();
+    const c = new AbortController();
+    controllerRef.current = c;
+    fetchServers(c.signal);
+    return () => {
+      c.abort();
+      controllerRef.current = null;
+    };
   }, [fetchServers]);
 
   // При заходе на страницу подставляем кеш — сразу видны последние проверки
   useEffect(() => {
     if (jumphosts.length === 0) return;
-    api.get('/uptime/cache')
+    const signal = controllerRef.current?.signal;
+    if (!signal) return;
+    api.get('/uptime/cache', { signal })
       .then(({ data }) => {
         if (data?.results && typeof data.results === 'object' && Object.keys(data.results).length > 0) {
           setStatusMap((prev) => ({ ...prev, ...data.results }));
         }
       })
-      .catch(() => {});
+      .catch((e) => {
+        if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
+      });
   }, [jumphosts]);
 
   const checkIntervalMs = checkIntervalSeconds * 1000;
diff --git a/frontend/src/components/S3MetaBar.jsx b/frontend/src/components/S3MetaBar.jsx
index de263b7..adc8e4c 100644
--- a/frontend/src/components/S3MetaBar.jsx
+++ b/frontend/src/components/S3MetaBar.jsx
@@ -7,19 +7,25 @@ function S3MetaBar({ keys = [], className = '' }) {
   const [meta, setMeta] = useState({});
   const [loading, setLoading] = useState(false);
 
-  const fetchMeta = async () => {
+  const fetchMeta = async (abortSignal) => {
     setLoading(true);
+    const opts = abortSignal ? { signal: abortSignal } : {};
     try {
-      const res = await api.get('/s3/last-modified');
+      const res = await api.get('/s3/last-modified', opts);
       setMeta(res.data || {});
-    } catch {
+    } catch (e) {
+      if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
       setMeta({});
     } finally {
       setLoading(false);
     }
   };
 
-  useEffect(() => { fetchMeta(); }, []);
+  useEffect(() => {
+    const controller = new AbortController();
+    fetchMeta(controller.signal);
+    return () => controller.abort();
+  }, []);
 
   const copyMeta = async (k) => {
     try {