diff --git a/extensions/signal/src/setup-managed-validation-integration.test.ts b/extensions/signal/src/setup-managed-validation-integration.test.ts
index c4c82ac4b580..899ae4998c8f 100644
--- a/extensions/signal/src/setup-managed-validation-integration.test.ts
+++ b/extensions/signal/src/setup-managed-validation-integration.test.ts
@@ -145,4 +145,38 @@ describe("Signal managed setup validation wiring", () => {
       }),
     );
   });
+
+  it("propagates setup cancellation without entering readiness recovery", async () => {
+    const cfg: OpenClawConfig = {
+      channels: {
+        signal: {
+          account: "+15555550123",
+          transport: { kind: "managed-native", httpPort: 8080 },
+        },
+      },
+    };
+    const { queued, credentialValues } = await prepareLocal(cfg);
+    const abort = new AbortController();
+    const reason = new DOMException("setup cancelled", "AbortError");
+    mocks.probeManagedSignalSetup.mockImplementationOnce(async (params) => {
+      expect(params.abortSignal).toBe(abort.signal);
+      abort.abort(reason);
+      params.abortSignal?.throwIfAborted();
+      return { ok: false };
+    });
+
+    await expect(
+      runSetupWizardFinalize({
+        finalize: signalSetupWizard.finalize,
+        cfg,
+        credentialValues,
+        prompter: queued.prompter,
+        runtime: createRuntimeEnv({ throwOnExit: false }),
+        options: { abortSignal: abort.signal },
+      }),
+    ).rejects.toBe(reason);
+
+    expect(queued.select).toHaveBeenCalledTimes(1);
+    expect(queued.note).not.toHaveBeenCalledWith(expect.any(String), "Signal setup");
+  });
 });
diff --git a/extensions/signal/src/setup-managed-validation.test.ts b/extensions/signal/src/setup-managed-validation.test.ts
index 667b05b4cdd5..43bac94e921a 100644
--- a/extensions/signal/src/setup-managed-validation.test.ts
+++ b/extensions/signal/src/setup-managed-validation.test.ts
@@ -26,9 +26,14 @@ const mocks = vi.hoisted(() => ({
       isExited: () => false,
     }),
   ),
-  waitForReady: vi.fn(async (params: { check: () => Promise<SignalTransportProbeResult> }) => {
-    await params.check();
-  }),
+  waitForReady: vi.fn(
+    async (params: {
+      abortSignal?: AbortSignal;
+      check: () => Promise<SignalTransportProbeResult>;
+    }) => {
+      await params.check();
+    },
+  ),
 }));
 
 vi.mock("openclaw/plugin-sdk/transport-ready-runtime", () => ({
@@ -114,6 +119,34 @@ describe("probeManagedSignalSetup", () => {
     expect(mocks.spawnDaemon).not.toHaveBeenCalled();
   });
 
+  it.each([
+    {
+      name: "localhost connection for an IPv4 loopback bind",
+      candidate: { ...transport, url: "http://localhost:8080" },
+    },
+    {
+      name: "IPv4 loopback connection for a localhost bind",
+      candidate: { ...transport, httpHost: "localhost", url: "http://127.0.0.1:8080" },
+    },
+  ])("does not re-probe the managed bind through $name", async ({ candidate }) => {
+    const cfg = {
+      channels: { signal: { accounts: { work: { account, transport: candidate } } } },
+    } as OpenClawConfig;
+
+    await expect(
+      probeManagedSignalSetup(createParams(cfg, candidate, account)),
+    ).resolves.toMatchObject({ ok: true });
+
+    expect(mocks.probeTransport).toHaveBeenCalledOnce();
+    expect(mocks.probeTransport).toHaveBeenCalledWith(
+      expect.objectContaining({
+        transport: expect.objectContaining({
+          url: `http://${candidate.httpHost}:8080`,
+        }),
+      }),
+    );
+  });
+
   it("uses owner-known proof for the exact daemon registered by the monitor lifecycle", async () => {
     const cfg = {
       channels: { signal: { accounts: { work: { account, transport } } } },
@@ -209,6 +242,22 @@ describe("probeManagedSignalSetup", () => {
     expect(mocks.stop).toHaveBeenCalledOnce();
   });
 
+  it("passes setup cancellation to readiness and rethrows its reason after cleanup", async () => {
+    const abort = new AbortController();
+    const reason = new DOMException("setup cancelled", "AbortError");
+    mocks.waitForReady.mockImplementationOnce(async ({ abortSignal }) => {
+      expect(abortSignal).toBe(abort.signal);
+      abort.abort(reason);
+    });
+
+    await expect(
+      probeManagedSignalSetup({ ...createParams(), abortSignal: abort.signal }),
+    ).rejects.toBe(reason);
+
+    expect(mocks.spawnDaemon).toHaveBeenCalledOnce();
+    expect(mocks.stop).toHaveBeenCalledOnce();
+  });
+
   it("returns the actual final-port bind category without spawning", async () => {
     mocks.assertBindAvailable.mockRejectedValueOnce(
       new Error("address unavailable (EADDRNOTAVAIL)"),
diff --git a/extensions/signal/src/setup-managed-validation.ts b/extensions/signal/src/setup-managed-validation.ts
index bd16b98c3c5a..33e3894e1453 100644
--- a/extensions/signal/src/setup-managed-validation.ts
+++ b/extensions/signal/src/setup-managed-validation.ts
@@ -12,6 +12,7 @@ import {
   type SignalManagedNativeTransport,
   type SignalTransportProbeResult,
 } from "./setup-transport.js";
+import { isSignalManagedNativeConnectionUrlForBind } from "./transport-policy.js";
 import { buildSignalTransportHttpUrl } from "./transport-url.js";
 
 type ResolvedManagedSignalTransport = Extract<
@@ -59,8 +60,10 @@ async function probeManagedBind(params: {
   resolved: ResolvedManagedSignalTransport;
   account: string;
   accountBinding: "selected-account" | "owner-known-bound-account";
+  abortSignal?: AbortSignal;
 }): Promise<SignalTransportProbeResult> {
-  return await probeSignalTransport({
+  params.abortSignal?.throwIfAborted();
+  const result = await probeSignalTransport({
     cfg: params.cfg,
     accountId: params.accountId,
     transport: {
@@ -73,6 +76,8 @@ async function probeManagedBind(params: {
     nativeAccountBinding: params.accountBinding,
     timeoutMs: 1_000,
   }).catch((error: unknown) => ({ ok: false, error: String(error) }));
+  params.abortSignal?.throwIfAborted();
+  return result;
 }
 
 async function probeSeparateConnectionUrl(params: {
@@ -81,18 +86,28 @@ async function probeSeparateConnectionUrl(params: {
   transport: SignalManagedNativeTransport;
   resolved: ResolvedManagedSignalTransport;
   account: string;
+  abortSignal?: AbortSignal;
 }): Promise<SignalTransportProbeResult> {
-  const bindUrl = buildSignalTransportHttpUrl(params.resolved.httpHost, params.resolved.httpPort);
-  if (params.resolved.baseUrl === bindUrl) {
+  params.abortSignal?.throwIfAborted();
+  if (
+    isSignalManagedNativeConnectionUrlForBind({
+      ...params.transport,
+      url: params.resolved.baseUrl,
+      httpHost: params.resolved.httpHost,
+      httpPort: params.resolved.httpPort,
+    })
+  ) {
     return { ok: true, status: 200, error: null };
   }
-  return await probeSignalTransport({
+  const result = await probeSignalTransport({
     cfg: params.cfg,
     accountId: params.accountId,
     transport: params.transport,
     account: params.account,
     timeoutMs: 1_000,
   }).catch((error: unknown) => ({ ok: false, error: String(error) }));
+  params.abortSignal?.throwIfAborted();
+  return result;
 }
 
 export async function probeManagedSignalSetup(params: {
@@ -104,7 +119,9 @@ export async function probeManagedSignalSetup(params: {
   reusableConfiguredTransport?: string;
   runtime: RuntimeEnv;
   prompter: WizardPrompter;
+  abortSignal?: AbortSignal;
 }): Promise<SignalTransportProbeResult> {
+  params.abortSignal?.throwIfAborted();
   const resolved = resolveSignalTransport(params.transport);
   if (resolved.kind !== "managed-native") {
     throw new Error("Signal setup did not resolve a managed signal-cli transport.");
@@ -157,6 +174,7 @@ export async function probeManagedSignalSetup(params: {
       httpHost: resolved.httpHost,
       httpPort: resolved.httpPort,
     });
+    params.abortSignal?.throwIfAborted();
     const spawnedDaemon = spawnSignalDaemon({
       cliPath: resolved.cliPath,
       ...(resolved.configPath ? { configPath: resolved.configPath } : {}),
@@ -176,6 +194,7 @@ export async function probeManagedSignalSetup(params: {
       logAfterMs: 10_000,
       logIntervalMs: 10_000,
       pollIntervalMs: 150,
+      ...(params.abortSignal ? { abortSignal: params.abortSignal } : {}),
       runtime: params.runtime,
       check: async () => {
         if (spawnedDaemon.isExited()) {
@@ -189,18 +208,26 @@ export async function probeManagedSignalSetup(params: {
         return result;
       },
     });
+    params.abortSignal?.throwIfAborted();
     if (result.ok) {
       result = await probeSeparateConnectionUrl({ ...params, resolved });
     }
     return result;
   } catch (error) {
+    params.abortSignal?.throwIfAborted();
     result = { ok: false, error: String(error) };
     return result;
   } finally {
     try {
       await daemon?.stop();
     } finally {
-      progress.stop(result.ok ? "Signal setup validated." : "Signal setup validation failed.");
+      progress.stop(
+        params.abortSignal?.aborted
+          ? "Signal setup validation cancelled."
+          : result.ok
+            ? "Signal setup validated."
+            : "Signal setup validation failed.",
+      );
     }
   }
 }
diff --git a/extensions/signal/src/setup-surface.ts b/extensions/signal/src/setup-surface.ts
index b363c2162134..e9f136bb22fd 100644
--- a/extensions/signal/src/setup-surface.ts
+++ b/extensions/signal/src/setup-surface.ts
@@ -332,6 +332,7 @@ export const signalSetupWizard: ChannelSetupWizard = {
           params.credentialValues[signalSetupStateKeys.managedReuseTransport],
         runtime: params.runtime,
         prompter: params.prompter,
+        ...(params.options?.abortSignal ? { abortSignal: params.options.abortSignal } : {}),
       });
       if (probe.ok) {
         if (params.credentialValues[SIGNAL_LINK_COMPLETED_INPUT_KEY] === "true") {