Networking

Sean wants to know what an ARP is. He keeps getting that message when running ESET. Leo says that there's likely ARP Spoofing that is "spoofing" IP addresses that your computer allows through. It's known as ARP poisoning, and it points to malware spying on your network. But it isn't likely. More often, it's your ISP that's causing the issue. If you're using a router from your provider, it's likely in need of updating, or it's misconfigured. 

Henry has a Synology NAS at home and at the office. But he's having issues with Windows users in his company being able to access it remotely. How can he do that? Leo says that remote access via SMB may have a security issue that causes Synology not to support it. There is an open-source version called CIF that should work, however. It can also support NFS. Leo can log into his using Windows, Mac and Linux with no problem. Make sure you have all the ports open that you need. CIF uses 139 or 445. NFS 5005,5006. Synology also supports SSH.

Rudy wants to know how secure public apartment wifi is if everyone is using the same password? Leo says it's not secure at all. What it means though, is that anyone who knows the password can use the wifi. But it also means that if someone is malicious, they can use hacking tools to gain access to other people's computers and data. That's why Leo says that a VPN is a must for a situation like this. Or at least only surfing to HTTPS websites only, so the traffic is encrypted. Another option is to use a travel router. It's designed to join a public network and provides a barrier like a VPN.