0.2.9 clients and relays don't print any warning that they're obsolete. Since 0.2.9 is EOL, the following protocols are in all supported versions of Tor, but aren't currently recommended: * Desc=2, Microdesc=2, and Cons=2 are supported [since 0.2.7.x](https://gitweb.torproject.org/tor.git/tree/src/or/protover.c?h=maint-0.2.9#n761) * HSRend=2 is supported [since 0.2.9.1-alpha](https://github.com/torproject/tor/commit/4cbfee14d40221a25545d2d2c3d6e6ce76f6afe9) * LinkAuth=3 is supported [since 0.3.0.1-alpha](https://github.com/torproject/tor/commit/b7a1e793e69e540e0377fa4418810ff1c02d50f9) (LinkAuth=1 was removed in legacy/trac#27286) * HSDir=2 and HSIntro=4 are supported [since 0.3.0.4-rc](https://github.com/torproject/tor/commit/3f005c0433c56a540c211c9b6be1cf45a8185bc7) * DirCache=2 is supported since [0.3.1.1-alpha](https://github.com/torproject/tor/commit/f9d8ade91242a702589e4e2ff2a280836fabb4da) * Link=5 is supported [since 0.3.1.1-alpha / 0.3.1.10](https://github.com/torproject/tor/commit/a8e5e3a492378f6a9a2b4d55a4e7e5bab3f9dca4)