> ## Documentation Index
> Fetch the complete documentation index at: https://docs.siderolabs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Blackhole Routes

> How to configure blackhole routes in your network.

export const VersionWarningBanner = () => {
  const latestVersion = "v1.13";
  const [latestUrl, setLatestUrl] = useState(null);
  const [currentVersion, setCurrentVersion] = useState(null);
  const [isBeta, setIsBeta] = useState(false);
  const parseVersion = v => v.replace("v", "").split(".").map(Number);
  const isGreaterVersion = (a, b) => {
    const [aMajor, aMinor] = parseVersion(a);
    const [bMajor, bMinor] = parseVersion(b);
    if (aMajor > bMajor) return true;
    if (aMajor === bMajor && aMinor > bMinor) return true;
    return false;
  };
  useEffect(() => {
    if (typeof window === "undefined") return;
    const {pathname, hash, search} = window.location;
    const match = pathname.match(/\/talos\/(v\d+\.\d+)\//);
    if (!match) return;
    const detectedVersion = match[1];
    if (detectedVersion === latestVersion) return;
    setCurrentVersion(detectedVersion);
    if (isGreaterVersion(detectedVersion, latestVersion)) {
      setIsBeta(true);
    }
    const newPath = pathname.replace(`/talos/${detectedVersion}/`, `/talos/${latestVersion}/`);
    setLatestUrl(`${newPath}${search}${hash}`);
  }, []);
  if (!latestUrl || !currentVersion) return null;
  return <div className="not-prose sticky top-6 z-50 my-6">
      <div className="border border-yellow-500/30 bg-yellow-500/10 px-4 py-3 rounded-xl">
        <div className="text-sm">
          {isBeta ? <>
              ⚠️ You are viewing a <strong>beta version</strong> of Talos ({currentVersion}).
              This version may be unstable.
              <a href={latestUrl} className="ml-2 underline text-yellow-400 hover:text-yellow-300 font-medium">
                View latest stable version {latestVersion} →
              </a>
            </> : <>
              ⚠️ You are viewing an older version of Talos ({currentVersion}).
              <a href={latestUrl} className="ml-2 underline text-yellow-400 hover:text-yellow-300 font-medium">
                View the latest version {latestVersion} →
              </a>
            </>}
        </div>
      </div>
    </div>;
};

<VersionWarningBanner />

Blackhole routes are used to discard traffic destined for specific IP addresses or subnets.
It might be useful to set up blackhole routes for security reasons, to prevent traffic from reaching certain destinations,
or for temporary testing and troubleshooting purposes.

Blackhole routes can be configured in Talos Linux using the [`BlackholeRouteConfig`](../../reference/configuration/network/blackholerouteconfig) machine configuration document:

```yaml theme={null}
apiVersion: v1alpha1
kind: BlackholeRouteConfig
name: 169.254.1.1/32
```

This configuration creates a blackhole route for the IP address `169.254.1.1` - any traffic destined for this IP address will be discarded by the system.

Blackhole route will appear as a route attached to the loopback interface `lo` (for IPv6) or as a route attached to no interface (for IPv4) with the `blackhole` type:

```bash theme={null}
$ talosctl  get routes
NODE         NAMESPACE   TYPE          ID                                                       VERSION   DESTINATION                     GATEWAY      LINK        METRIC
172.20.0.5   network     RouteStatus   inet4//169.254.1.1/32/1024                               1         169.254.1.1/32                                           1024
```