1

There are a few ways that an ISP could learn that you're using Tor. Like you said, an ISP could easily download a list of all Tor relays and check if you're connecting to an address (ip/port) of any relay. This is the most common (and easiest) way of censoring the Tor network. Some users run unlisted bridge relays so that censors (or in this case the ISP) ...


Only top voted, non community-wiki answers of a minimum length are eligible