The onion services running in the Debian project have all been upgraded to version 3
The Tor Project and the Debian Project have been working together, and back in 2016 the Debian Project, which works on the development of the Linux-based Debian operating system, already announced that its services and repositories would be available on the Tor network. The reason behind this shift was to enhance anonymity and security for Debian Linux users.And Debian has announced the existence of few such services in a blog post:
We, the Debian project and the Tor project are enabling Tor onion services for several of our sites. These sites can now be reached without leaving the Tor network, providing a new option for securely connecting to resources provided by Debian and Tor.
The freedom to use open source software may be compromised when access to that software is monitored, logged, limited, prevented, or prohibited. As a community, we acknowledge that users should not feel that their every action is trackable or observable by others. Consequently, we are pleased to announce that we have started making several of the various web services provided by both Debian and Tor available via onion services.
While onion services can be used to conceal the network location of the machine providing the service, this is not the goal here. Instead, we employ onion services because they provide end-to-end integrity and confidentiality, and they authenticate the onion service end point.
For instance, when users connect to the onion service running at http://sejnfjrq6szgca7v.onion/, using a Tor-enabled browser such as the TorBrowser, they can be certain that their connection to the Debian website cannot be read or modified by third parties, and that the website that they are visiting is indeed the Debian website. In a sense, this is similar to what using HTTPS provides. However, crucially, onion services do not rely on third-party certification authorities (CAs). Instead, the onion service name cryptographically authenticates its cryptographic key.
In addition to the Tor and Debian websites, the Debian FTP and the Debian Security archives are available from .onion addresses, enabling Debian users to update their systems using only Tor connections.
Users who like Debian and Tor should check out and use the "List of Onion Services run by the Debian Project": all Tor Onion services have recently been upgraded to v3 at https://onion.debian.org/. This is a list of onion services run by the Tor Project. Most of them use OnionBalance to provide services from multiple backends.
When using Debian systems, the apt-transport-tor command allows you to configure OS package installation and updates to be performed through the Tor onion service, as well as to access the Debian repository on Tor by:
deb tor+http://2s4yqjx5ul6okpp3f2gaunr2syex5jgbfpfvhxxbbjwnrsvbk5v3qbid.onion/debian buster main deb tor+http://2s4yqjx5ul6okpp3f2gaunr2syex5jgbfpfvhxxbbjwnrsvbk5v3qbid.onion/debian buster-updates main deb tor+http://5ajw6aqf3ep7sijnscdzw77t7xq4xjpsy335yb2wiwgouo7yfxtjlmid.onion/debian-security buster/updates main #deb tor+http://2s4yqjx5ul6okpp3f2gaunr2syex5jgbfpfvhxxbbjwnrsvbk5v3qbid.onion/debian buster-backports main
From：On DarkNet – Dark web News and Analysis
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