This will allow you to identify in your configuration file which one is which version. If you wish to keep running your version 2 service until it is deprecated to provide a transition path to your users, add this line to the configuration block of your version 2 service: HiddenServiceVersion 2 Restart tor, and look on your directory for the new address. The default version is now set to 3 so you don't need to explicitly set it. In torrc, to create a version 3 address, you simply need to create a new service just as you did your v2 service, with these two lines: HiddenServiceDir /full/path/to/your/new/v3/directory/ What is the recommendation for developers to migrate? Any tips on how to spread the new v3 addresses to people?
This is a backward incompatible change: v2 onion services will not be reachable after September 2021. If you have a v2 onion, we recommend you migrate now. V2 onion addresses are fundamentally insecure. Can I keep using my v2 onion address? Can I access my v2 onion after September? Is this a backward-incompatible change? You can read more in the Tor Project's blog post Onion Service version 2 deprecation timeline. In October 2021, we will release new Tor client stable versions for all supported series that will disable v2. In July 2021, 0.4.6 Tor will no longer support v2 and support will be removed from the code base. Tor Browser started warning users in June, 2021. In September 2020, Tor started warning onion service operators and clients that v2 will be deprecated and obsolete in version 0.4.6.
What is the timeline for the v2 deprecation? If you're a user, please ensure that you update your bookmarks to the website's v3 onion addresses. If you're an onion service administrator, you must upgrade to v3 onion services as soon as possible. Tor Project's v2 address:, and Tor Project's v3 address: You can identify v3 onion addresses by their 56 character length, e.g. How do I know if I'm using v2 or v3 onion services?
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