This morning, I experienced an issue with my modem while watching TV; it reset itself unexpectedly and I had to rename my WiFi network during the initial setup. After reconnecting, I noticed that there was no internet traffic. When I checked my laptop, a new portal was appearing over the modem's IP address, and it kept changing every time I closed it. My ESET antivirus software alerted me that an ARP Poisoning Attack was blocked. I've reset my laptop, but now I'm wondering what steps I should take next and how such an attack happens in the first place.
3 Answers
Just a heads up, your antivirus might have been mistaken. Even if it was ARP poisoning, it's likely that the attacker couldn't access your machine. They might have just blocked your internet traffic or monitored what was being sent and received. The modem reset could mean it detected some issue, but it's hard to say for sure.
Honestly, I'm betting it was just a glitch with your modem. Unless you're a person of interest, it's rare for anyone to target you specifically.
ARP Poisoning (or ARP Spoofing) is a local network attack where malicious ARP packets are sent to the gateway to change the IP to MAC address associations. This means an attacker's machine could intercept your internet traffic without you knowing it. It's relatively easy to execute if the attacker is in the same network, which is why it's important to secure your network. After getting an alert, it’s a good idea to check your network settings and potentially reset your modem again to be safe.

Thanks for the info! I did some digging already but I'm looking for what I should do now to safeguard my connections.