I’ve long known about the technique of SSH Tunneling, but have always considered that a bit of security work that I never needed to do. This is ignorant. It’s that same voice that says “screw flossing” or “parking neatly between the lines”. It’s only through willful ignorance or a choice to ignore other data that you would choose not to do this, especially if you hop from public access point to point as I tend to do. Most internet applications make use of sending their data on a given port. HTTP ( aka what browsers use to transmit data ) operates on port 80, SMTP ( used to send mail out from a non-web client ) uses port 25 outbound, POP and IMAP are used for mail client inbound ( ports 110 and 143, respectively ).