IS YOUR INTERNET HACKED?

SIGN 1: UNEXPLAINED SPEED DROPS

We all experience buffering occasionally, but if your internet speed drops significantly and consistently without a service outage in your area, investigate immediately. If you have a hacker or a "Wi-Fi leech" (a neighbour stealing your internet) on your network, their activity will consume your bandwidth.

If they are streaming 4K video or downloading massive files, your connection can crawl. Crypto-mining usually slows down the hacked device (CPU/GPU), not your internet speed, unless the malware is also uploading/downloading heavily. Disconnect your known devices and watch the router lights. Some background traffic is normal, but constant heavy activity can be a clue—confirm it by checking the router’s connected device list / traffic logs (if available).

You should also run a speed test and compare it to what your provider promises. If you’re paying for 100Mbps but consistently seeing ~5Mbps, and your ISP reports no line fault, it’s likely a local issue (Wi-Fi interference, router placement, device problems, or an unwanted device). Hacking is only one possibility.

SIGN 2: STRANGE BROWSER BEHAVIOUR

Malware and network intrusions often manifest in your web browser. Common signs include frequent redirects to websites you didn't intend to visit, or your default homepage changing without your permission. You might search for "BBC News" and end up on a site selling "miracle cures" or dodgy software.

Pay attention to your toolbars. If new, unfamiliar toolbars appear in Chrome, Firefox, or Edge, this is a classic sign of adware. While this might be an infection on your specific computer rather than the entire network, it acts as a gateway for hackers to harvest data from your browsing sessions.

Another subtle sign is an increase in targeted phishing emails. A spike in convincing phishing is usually linked to data breaches, tracking, or stolen email lists, not someone watching your home traffic. Treat it as a warning sign to tighten security (unique passwords + 2FA), but not proof your router is hacked.

THE ULTIMATE TEST: CHECKING THE ROUTER

The most definitive way to check for intruders is to log into your router's administrative panel. This sounds technical, but it is straightforward. You’ll need the router’s admin login (often on the sticker, or set during installation). This is not always the same as the Wi-Fi password.

Once logged in, look for a section labelled "Attached Devices", "Device List", or "DHCP Clients". This will show you every single device currently connected to your Wi-Fi or plugged in via Ethernet.

Go through the list carefully. Router device names are often vague. If you see an unfamiliar device, verify it first: match the MAC address/vendor, disconnect one of your devices to see what disappears, and check for “Randomised MAC” on phones. If you still can’t identify it, block it and change Wi-Fi + router admin passwords.

FAKE ANTIVIRUS POP-UPS (SCAREWARE / ‘TECH SUPPORT’ SCAMS)

A more aggressive sign of hacking is the appearance of fake antivirus warnings. These are often pop-up windows designed to look like legitimate system alerts from Microsoft or Apple. They will claim your computer is "infected" and urge you to call a support number or download a specific "cleaner" tool.

Do not click them. This is known as "scareware". If these pop-ups appear, it could be a malicious browser extension/adware or a DNS/router issue. Check the device for extensions/malware first, then verify router DNS settings. If the router settings look altered or you can’t trust them, a factory reset + firmware update + new admin password is the cleanest fix.

If you see a message demanding payment to unlock files, that’s ransomware. Disconnect the device from the internet immediately to prevent it spreading to other devices on your home network.

RED FLAG MATRIX

Diagnosing a hack isn't always obvious. Click on a symptom below to understand what it might mean for your network security and the immediate risk level.

HOW DO HACKERS GET IN?

Understanding the entry point is key to prevention. The most common vulnerability is a weak password. Many people leave their router set to the default admin credentials (often "admin" and "password"), which hackers can guess in seconds.

Another vector is "remote management". Some routers allow you to access settings from anywhere in the world. While convenient, this opens a port that hackers scan for. If they find it and crack your password, they own your network. Vulnerabilities in outdated router firmware are also common targets; manufacturers release patches, but users rarely install them.

THE DANGER OF DNS HIJACKING

DNS (Domain Name System) is the phonebook of the internet, translating "google.com" into an IP address. When a hacker gains control of your router, they can change the DNS settings. This is called DNS Hijacking.

Instead of going to your bank's real website, the rogue DNS sends you to a perfect replica site owned by the hacker. You type in your login details, and they capture them instantly. If you suspect this, you can manually set your DNS on your computer to a trusted public server like Google's (8.8.8.8) or Cloudflare's (1.1.1.1) to bypass the compromised router settings.

STEP 1: LOCK DOWN YOUR NETWORK

If you have confirmed a breach or just want to be safe, the first step is to change your Wi-Fi password immediately. Choose a strong phrase that mixes letters, numbers, and symbols. Crucially, ensure you are using WPA3 encryption if your router supports it, or at least WPA2-AES. Avoid WEP or WPA-TKIP as these are easily cracked.

Next, disable "WPS" (Wi-Fi Protected Setup). This is the feature that lets you connect by pressing a button on the router. WPS (especially PIN mode) has a known design weakness that can make brute-forcing feasible on some routers—turn it off unless you truly need it.

STEP 2: UPDATE YOUR FIRMWARE

Router manufacturers frequently release updates to patch security holes. However, unlike Windows or iOS, many routers do not update themselves automatically. Log into the admin panel again and look for "Firmware Update" or "System Update".

If your router is supplied by your ISP, updates are often pushed automatically—but it varies by provider/model. Check your router status page (or ISP support page) if you’re unsure. However, if you bought your own high-performance router (like a Netgear or Asus), it is entirely your responsibility to keep it updated. An outdated router is an open door for automated hacking bots.

ADVANCED DEFENCE: VPNs & FIREWALLS

For an extra layer of security, consider using a Virtual Private Network (VPN). A VPN encrypts traffic between your device and the VPN server. It’s most valuable on public Wi-Fi and for privacy from local network operators/ISPs. At home, WPA2/WPA3 already encrypts Wi-Fi traffic, and a VPN won’t help if your device is infected or you’re tricked by phishing.

Most modern routers also have a built-in firewall. Ensure this is enabled in your settings. It acts as a barrier, inspecting incoming traffic and blocking unauthorised access attempts before they reach your devices.

SECURITY RESPONSE TIMELINE