The safest port is the one that doesn't exist.

Port forwarding is a crucial networking technique that allows you to make a computer or device on your local network accessible to the internet, bypassing the security features of your router. This is ...

I've got a fax machine converting inbound faxes to PDFs and sending them to my email. My ISP is now blocking port 25 on their entire network, no exceptions. Port 25 is fixed in the fax firmware and ...