Add mass unban: DELETE /api/bans/all clears all active bans

- Send fail2ban's `unban --all` command via new `unban_all_ips()` service
  function; returns the count of unbanned IPs
- Add `UnbanAllResponse` Pydantic model (message + count)
- Add `DELETE /api/bans/all` router endpoint; handles 502 on socket error
- Frontend: `bansAll` endpoint constant, `unbanAllBans()` API call,
  `UnbanAllResponse` type, `unbanAll` action in `useActiveBans` hook
- JailsPage: "Clear All Bans" button (visible when bans > 0) with a
  Fluent UI confirmation Dialog before executing the operation
- 7 new tests (3 service, 4 router); 440 total pass, 82% coverage

Docs/Tasks.md

@@ -320,3 +320,89 @@ When the most recent blocklist import run completed with errors, a warning indic
 | Frontend layout | `frontend/src/layouts/MainLayout.tsx` |
 | Tests | `backend/tests/test_services/test_blocklist_service.py` |
 | Tests | `backend/tests/test_routers/test_blocklist.py` |
+
+---
+
+## Task 6 — Mass Unban: Clear All Currently Banned IPs ✅ DONE
+
+**Completed:** Added `unban_all_ips()` service function using fail2ban's `unban --all` command. Added `DELETE /api/bans/all` endpoint returning `UnbanAllResponse` with count. Frontend: `bansAll` endpoint constant, `unbanAllBans()` API function, `UnbanAllResponse` type in `types/jail.ts`, `unbanAll` action exposed from `useActiveBans` hook. JailsPage `ActiveBansSection` shows a "Clear All Bans" button (only when bans > 0) that opens a Fluent UI confirmation Dialog before executing. Tests: 7 new tests (3 service + 4 router); 440 total pass.
+
+### Problem
+
+[Features.md § 5](Features.md) specifies: *"Option to unban all IPs at once across every jail."*  
+Currently the Jails page allows unbanning a single IP from a specific jail or from all jails, but there is no mechanism to clear every active ban globally in one operation. fail2ban supports this natively via the `unban --all` socket command, which returns the count of unbanned IPs.
+
+### Goal
+
+Add a **"Clear All Bans"** action that:
+1. Sends `unban --all` to fail2ban, removing every active ban across every jail in a single command.
+2. Returns a count of how many IPs were unbanned.
+3. Is exposed in the UI as a "Clear All Bans" button with a confirmation dialog so users cannot trigger it accidentally.
+4. Refreshes the active-bans list automatically after the operation completes.
+
+### Implementation Details
+
+**Backend — service function**
+
+1. **`backend/app/services/jail_service.py`** — Add `unban_all_ips(socket_path: str) -> int`:
+   - Sends `["unban", "--all"]` via `Fail2BanClient`.
+   - Returns the integer count reported by fail2ban (`_ok()` extracts it from the `(0, count)` tuple).
+   - Logs the operation at `info` level with the returned count.
+
+**Backend — new response model**
+
+2. **`backend/app/models/ban.py`** — Add `UnbanAllResponse(BaseModel)` with fields:
+   - `message: str` — human-readable summary.
+   - `count: int` — number of IPs that were unbanned.
+
+**Backend — new endpoint**
+
+3. **`backend/app/routers/bans.py`** — Add:
+   ```
+   DELETE /api/bans/all    — unban every currently banned IP across all jails
+   ```
+   - Returns `UnbanAllResponse` with `count` from the service call.
+   - No request body required.
+   - Handles `Fail2BanConnectionError` → 502.
+
+**Frontend — API**
+
+4. **`frontend/src/api/endpoints.ts`** — Add `bansAll: "/bans/all"` to the `ENDPOINTS` map.
+5. **`frontend/src/api/jails.ts`** — Add `unbanAllBans(): Promise<UnbanAllResponse>` that calls `del<UnbanAllResponse>(ENDPOINTS.bansAll)`.
+6. **`frontend/src/types/jail.ts`** — Add `UnbanAllResponse` interface `{ message: string; count: number }`.
+
+**Frontend — hook**
+
+7. **`frontend/src/hooks/useJails.ts`** — In `useActiveBans`, add `unbanAll: () => Promise<UnbanAllResponse>` action and expose it from the hook return value.
+
+**Frontend — UI**
+
+8. **`frontend/src/pages/JailsPage.tsx`** — In `ActiveBansSection`:
+   - Add a "Clear All Bans" `Button` (appearance `"outline"`, intent `"danger"`) in the section header next to the existing Refresh button.
+   - Wrap the confirm action in a Fluent UI `Dialog` with a warning body explaining the operation is irreversible.
+   - On confirmation, call `unbanAll()`, show a success `MessageBar` with the count, and call `refresh()`.
+
+**Tests**
+
+9. **`backend/tests/test_services/test_jail_service.py`** — Add `TestUnbanAllIps`:
+   - `test_unban_all_ips_returns_count` — mocks client with `(0, 5)` response, asserts return is `5`.
+   - `test_unban_all_ips_raises_on_fail2ban_error` — mocks client to raise `Fail2BanConnectionError`, asserts it propagates.
+10. **`backend/tests/test_routers/test_bans.py`** — Add `TestUnbanAll`:
+    - `test_204_clears_all_bans` — patches `unban_all_ips` returning `3`, asserts 200 response with `count == 3`.
+    - `test_502_when_fail2ban_unreachable` — patches `unban_all_ips` raising `Fail2BanConnectionError`, asserts 502.
+    - `test_401_when_unauthenticated` — unauthenticated request returns 401.
+
+### Files Touched
+
+| Layer | File |
+|-------|------|
+| Model | `backend/app/models/ban.py` |
+| Service | `backend/app/services/jail_service.py` |
+| Router | `backend/app/routers/bans.py` |
+| Frontend type | `frontend/src/types/jail.ts` |
+| Frontend API | `frontend/src/api/endpoints.ts` |
+| Frontend API | `frontend/src/api/jails.ts` |
+| Frontend hook | `frontend/src/hooks/useJails.ts` |
+| Frontend UI | `frontend/src/pages/JailsPage.tsx` |
+| Tests | `backend/tests/test_services/test_jail_service.py` |
+| Tests | `backend/tests/test_routers/test_bans.py` |

backend/app/models/ban.py

@@ -133,6 +133,15 @@ class ActiveBanListResponse(BaseModel):
     total: int = Field(..., ge=0)
 
 
+class UnbanAllResponse(BaseModel):
+    """Response for ``DELETE /api/bans/all``."""
+
+    model_config = ConfigDict(strict=True)
+
+    message: str = Field(..., description="Human-readable summary of the operation.")
+    count: int = Field(..., ge=0, description="Number of IPs that were unbanned.")
+
+
 # ---------------------------------------------------------------------------
 # Dashboard ban-list view models
 # ---------------------------------------------------------------------------

backend/app/routers/bans.py

@@ -5,6 +5,7 @@ Manual ban and unban operations and the active-bans overview:
 * ``GET    /api/bans/active`` — list all currently banned IPs
 * ``POST   /api/bans``        — ban an IP in a specific jail
 * ``DELETE /api/bans``        — unban an IP from one or all jails
+* ``DELETE /api/bans/all``    — unban every currently banned IP across all jails
 """
 
 from __future__ import annotations
@@ -17,7 +18,7 @@ if TYPE_CHECKING:
 from fastapi import APIRouter, HTTPException, Request, status
 
 from app.dependencies import AuthDep
-from app.models.ban import ActiveBanListResponse, BanRequest, UnbanRequest
+from app.models.ban import ActiveBanListResponse, BanRequest, UnbanAllResponse, UnbanRequest
 from app.models.jail import JailCommandResponse
 from app.services import geo_service, jail_service
 from app.services.jail_service import JailNotFoundError, JailOperationError
@@ -193,3 +194,39 @@ async def unban_ip(
         ) from exc
     except Fail2BanConnectionError as exc:
         raise _bad_gateway(exc) from exc
+
+
+@router.delete(
+    "/all",
+    response_model=UnbanAllResponse,
+    summary="Unban every currently banned IP across all jails",
+)
+async def unban_all(
+    request: Request,
+    _auth: AuthDep,
+) -> UnbanAllResponse:
+    """Remove all active bans from every fail2ban jail in a single operation.
+
+    Uses fail2ban's ``unban --all`` command to atomically clear every active
+    ban across all jails.  Returns the number of IPs that were unbanned.
+
+    Args:
+        request: Incoming request (used to access ``app.state``).
+        _auth: Validated session — enforces authentication.
+
+    Returns:
+        :class:`~app.models.ban.UnbanAllResponse` with the count of
+        unbanned IPs.
+
+    Raises:
+        HTTPException: 502 when fail2ban is unreachable.
+    """
+    socket_path: str = request.app.state.settings.fail2ban_socket
+    try:
+        count: int = await jail_service.unban_all_ips(socket_path)
+        return UnbanAllResponse(
+            message=f"All bans cleared. {count} IP address{'es' if count != 1 else ''} unbanned.",
+            count=count,
+        )
+    except Fail2BanConnectionError as exc:
+        raise _bad_gateway(exc) from exc

backend/app/services/jail_service.py

@@ -1014,3 +1014,25 @@ async def lookup_ip(
         "currently_banned_in": currently_banned_in,
         "geo": geo,
     }
+
+
+async def unban_all_ips(socket_path: str) -> int:
+    """Unban every currently banned IP across all fail2ban jails.
+
+    Uses fail2ban's global ``unban --all`` command, which atomically removes
+    every active ban from every jail in a single socket round-trip.
+
+    Args:
+        socket_path: Path to the fail2ban Unix domain socket.
+
+    Returns:
+        The number of IP addresses that were unbanned.
+
+    Raises:
+        ~app.utils.fail2ban_client.Fail2BanConnectionError: If the socket
+            cannot be reached.
+    """
+    client = Fail2BanClient(socket_path=socket_path, timeout=_SOCKET_TIMEOUT)
+    count: int = int(_ok(await client.send(["unban", "--all"])))
+    log.info("all_ips_unbanned", count=count)
+    return count

backend/tests/test_routers/test_bans.py

@@ -13,6 +13,7 @@ from app.config import Settings
 from app.db import init_db
 from app.main import create_app
 from app.models.ban import ActiveBan, ActiveBanListResponse
+from app.utils.fail2ban_client import Fail2BanConnectionError
 
 # ---------------------------------------------------------------------------
 # Fixtures
@@ -270,3 +271,61 @@ class TestUnbanIp:
             )
 
         assert resp.status_code == 404
+
+
+# ---------------------------------------------------------------------------
+# DELETE /api/bans/all
+# ---------------------------------------------------------------------------
+
+
+class TestUnbanAll:
+    """Tests for ``DELETE /api/bans/all``."""
+
+    async def test_200_clears_all_bans(self, bans_client: AsyncClient) -> None:
+        """DELETE /api/bans/all returns 200 with count when successful."""
+        with patch(
+            "app.routers.bans.jail_service.unban_all_ips",
+            AsyncMock(return_value=3),
+        ):
+            resp = await bans_client.request("DELETE", "/api/bans/all")
+
+        assert resp.status_code == 200
+        data = resp.json()
+        assert data["count"] == 3
+        assert "3" in data["message"]
+
+    async def test_200_with_zero_count(self, bans_client: AsyncClient) -> None:
+        """DELETE /api/bans/all returns 200 with count=0 when no bans existed."""
+        with patch(
+            "app.routers.bans.jail_service.unban_all_ips",
+            AsyncMock(return_value=0),
+        ):
+            resp = await bans_client.request("DELETE", "/api/bans/all")
+
+        assert resp.status_code == 200
+        assert resp.json()["count"] == 0
+
+    async def test_502_when_fail2ban_unreachable(
+        self, bans_client: AsyncClient
+    ) -> None:
+        """DELETE /api/bans/all returns 502 when fail2ban is unreachable."""
+        with patch(
+            "app.routers.bans.jail_service.unban_all_ips",
+            AsyncMock(
+                side_effect=Fail2BanConnectionError(
+                    "cannot connect",
+                    "/var/run/fail2ban/fail2ban.sock",
+                )
+            ),
+        ):
+            resp = await bans_client.request("DELETE", "/api/bans/all")
+
+        assert resp.status_code == 502
+
+    async def test_401_when_unauthenticated(self, bans_client: AsyncClient) -> None:
+        """DELETE /api/bans/all returns 401 without session."""
+        resp = await AsyncClient(
+            transport=ASGITransport(app=bans_client._transport.app),  # type: ignore[attr-defined]
+            base_url="http://test",
+        ).request("DELETE", "/api/bans/all")
+        assert resp.status_code == 401

backend/tests/test_services/test_jail_service.py

@@ -554,3 +554,38 @@ class TestLookupIp:
             result = await jail_service.lookup_ip(_SOCKET, "9.9.9.9")
 
         assert result["currently_banned_in"] == []
+
+
+# ---------------------------------------------------------------------------
+# unban_all_ips
+# ---------------------------------------------------------------------------
+
+
+@pytest.mark.asyncio
+class TestUnbanAllIps:
+    """Tests for :func:`~app.services.jail_service.unban_all_ips`."""
+
+    async def test_unban_all_ips_returns_count(self) -> None:
+        """unban_all_ips returns the integer count from fail2ban."""
+        responses = {"unban|--all": (0, 5)}
+        with _patch_client(responses):
+            count = await jail_service.unban_all_ips(_SOCKET)
+
+        assert count == 5
+
+    async def test_unban_all_ips_returns_zero_when_none_banned(self) -> None:
+        """unban_all_ips returns 0 when no IPs are currently banned."""
+        responses = {"unban|--all": (0, 0)}
+        with _patch_client(responses):
+            count = await jail_service.unban_all_ips(_SOCKET)
+
+        assert count == 0
+
+    async def test_unban_all_ips_raises_on_connection_error(self) -> None:
+        """unban_all_ips propagates Fail2BanConnectionError."""
+        with patch(
+            "app.services.jail_service.Fail2BanClient",
+            side_effect=Fail2BanConnectionError("unreachable", _SOCKET),
+        ):
+            with pytest.raises(Fail2BanConnectionError):
+                await jail_service.unban_all_ips(_SOCKET)

frontend/src/api/endpoints.ts

@@ -48,6 +48,7 @@ export const ENDPOINTS = {
   // -------------------------------------------------------------------------
   bans: "/bans",
   bansActive: "/bans/active",
+  bansAll: "/bans/all",
 
   // -------------------------------------------------------------------------
   // Geo / IP lookup

frontend/src/api/jails.ts

@@ -13,6 +13,7 @@ import type {
   JailCommandResponse,
   JailDetailResponse,
   JailListResponse,
+  UnbanAllResponse,
 } from "../types/jail";
 
 // ---------------------------------------------------------------------------
@@ -197,6 +198,18 @@ export async function fetchActiveBans(): Promise<ActiveBanListResponse> {
   return get<ActiveBanListResponse>(ENDPOINTS.bansActive);
 }
 
+/**
+ * Unban every currently banned IP across all jails in a single operation.
+ *
+ * Uses fail2ban's global `unban --all` command.
+ *
+ * @returns An {@link UnbanAllResponse} with the count of unbanned IPs.
+ * @throws {ApiError} On non-2xx responses.
+ */
+export async function unbanAllBans(): Promise<UnbanAllResponse> {
+  return del<UnbanAllResponse>(ENDPOINTS.bansAll);
+}
+
 // ---------------------------------------------------------------------------
 // Geo / IP lookup
 // ---------------------------------------------------------------------------

frontend/src/hooks/useJails.ts

@@ -20,6 +20,7 @@ import {
   setJailIdle,
   startJail,
   stopJail,
+  unbanAllBans,
   unbanIp,
 } from "../api/jails";
 import type {
@@ -27,6 +28,7 @@ import type {
   IpLookupResponse,
   Jail,
   JailSummary,
+  UnbanAllResponse,
 } from "../types/jail";
 
 // ---------------------------------------------------------------------------
@@ -238,6 +240,8 @@ export interface UseActiveBansResult {
   banIp: (jail: string, ip: string) => Promise<void>;
   /** Unban an IP from a jail (or all jails when `jail` is omitted). */
   unbanIp: (ip: string, jail?: string) => Promise<void>;
+  /** Unban every currently banned IP across all jails. */
+  unbanAll: () => Promise<UnbanAllResponse>;
 }
 
 /**
@@ -293,6 +297,12 @@ export function useActiveBans(): UseActiveBansResult {
     load();
   };
 
+  const doUnbanAll = async (): Promise<UnbanAllResponse> => {
+    const result = await unbanAllBans();
+    load();
+    return result;
+  };
+
   return {
     bans,
     total,
@@ -301,6 +311,7 @@ export function useActiveBans(): UseActiveBansResult {
     refresh: load,
     banIp: doBan,
     unbanIp: doUnban,
+    unbanAll: doUnbanAll,
   };
 }
 

frontend/src/pages/JailsPage.tsx

@@ -20,6 +20,12 @@ import {
   DataGridHeader,
   DataGridHeaderCell,
   DataGridRow,
+  Dialog,
+  DialogActions,
+  DialogBody,
+  DialogContent,
+  DialogSurface,
+  DialogTitle,
   Field,
   Input,
   MessageBar,
@@ -36,6 +42,7 @@ import {
 import {
   ArrowClockwiseRegular,
   ArrowSyncRegular,
+  DeleteRegular,
   DismissRegular,
   LockClosedRegular,
   LockOpenRegular,
@@ -646,16 +653,38 @@ function BanUnbanForm({ jailNames, onBan, onUnban }: BanUnbanFormProps): React.J
 
 function ActiveBansSection(): React.JSX.Element {
   const styles = useStyles();
-  const { bans, total, loading, error, refresh, unbanIp } = useActiveBans();
+  const { bans, total, loading, error, refresh, unbanIp, unbanAll } = useActiveBans();
   const [opError, setOpError] = useState<string | null>(null);
+  const [opSuccess, setOpSuccess] = useState<string | null>(null);
+  const [confirmOpen, setConfirmOpen] = useState(false);
+  const [clearing, setClearing] = useState(false);
 
   const handleUnban = (ip: string, jail: string): void => {
     setOpError(null);
+    setOpSuccess(null);
     unbanIp(ip, jail).catch((err: unknown) => {
       setOpError(err instanceof Error ? err.message : String(err));
     });
   };
 
+  const handleClearAll = (): void => {
+    setClearing(true);
+    setOpError(null);
+    setOpSuccess(null);
+    unbanAll()
+      .then((res) => {
+        setOpSuccess(res.message);
+        setConfirmOpen(false);
+      })
+      .catch((err: unknown) => {
+        setOpError(err instanceof Error ? err.message : String(err));
+        setConfirmOpen(false);
+      })
+      .finally(() => {
+        setClearing(false);
+      });
+  };
+
   const banColumns = buildBanColumns(handleUnban);
 
   return (
@@ -669,21 +698,81 @@ function ActiveBansSection(): React.JSX.Element {
             </Badge>
           )}
         </Text>
-        <Button
-          size="small"
-          appearance="subtle"
-          icon={<ArrowClockwiseRegular />}
-          onClick={refresh}
-        >
-          Refresh
-        </Button>
+        <div style={{ display: "flex", gap: tokens.spacingHorizontalS }}>
+          <Button
+            size="small"
+            appearance="subtle"
+            icon={<ArrowClockwiseRegular />}
+            onClick={refresh}
+          >
+            Refresh
+          </Button>
+          {total > 0 && (
+            <Button
+              size="small"
+              appearance="outline"
+              icon={<DeleteRegular />}
+              onClick={() => {
+                setConfirmOpen(true);
+              }}
+            >
+              Clear All Bans
+            </Button>
+          )}
+        </div>
       </div>
 
+      {/* Confirmation dialog */}
+      <Dialog
+        open={confirmOpen}
+        onOpenChange={(_ev, data) => {
+          if (!data.open) setConfirmOpen(false);
+        }}
+      >
+        <DialogSurface>
+          <DialogBody>
+            <DialogTitle>Clear All Bans</DialogTitle>
+            <DialogContent>
+              <Text>
+                This will immediately unban <strong>all {String(total)} IP
+                {total !== 1 ? "s" : ""}</strong> across every jail. This
+                action cannot be undone — fail2ban will no longer block any
+                of those addresses until they trigger the rate-limit again.
+              </Text>
+            </DialogContent>
+            <DialogActions>
+              <Button
+                appearance="secondary"
+                onClick={() => {
+                  setConfirmOpen(false);
+                }}
+                disabled={clearing}
+              >
+                Cancel
+              </Button>
+              <Button
+                appearance="primary"
+                onClick={handleClearAll}
+                disabled={clearing}
+                icon={clearing ? <Spinner size="tiny" /> : <DeleteRegular />}
+              >
+                {clearing ? "Clearing…" : "Clear All Bans"}
+              </Button>
+            </DialogActions>
+          </DialogBody>
+        </DialogSurface>
+      </Dialog>
+
       {opError && (
         <MessageBar intent="error">
           <MessageBarBody>{opError}</MessageBarBody>
         </MessageBar>
       )}
+      {opSuccess && (
+        <MessageBar intent="success">
+          <MessageBarBody>{opSuccess}</MessageBarBody>
+        </MessageBar>
+      )}
       {error && (
         <MessageBar intent="error">
           <MessageBarBody>Failed to load bans: {error}</MessageBarBody>

frontend/src/types/jail.ts

@@ -184,6 +184,16 @@ export interface ActiveBanListResponse {
  *
  * Mirrors `GeoDetail` from `backend/app/models/geo.py`.
  */
+/**
+ * Mirrors `UnbanAllResponse` from `backend/app/models/ban.py`.
+ */
+export interface UnbanAllResponse {
+  /** Human-readable summary of the operation. */
+  message: string;
+  /** Number of IP addresses that were unbanned. */
+  count: number;
+}
+
 export interface GeoDetail {
   /** ISO 3166-1 alpha-2 country code (e.g. `"DE"`), or `null`. */
   country_code: string | null;