mastodon.world is one of the many independent Mastodon servers you can use to participate in the fediverse.
Generic Mastodon server for anyone to use.

Server stats:

12K
active users

Sean Mullan

DTLS version 1.0 has been disabled by default in Oracle's JDK 17.0.12 and 11.0.24 releases. This version of DTLS is not recommended and was already disabled by default in JDK 20 and later releases. DTLS is not available in releases prior to JDK 9.

See the Released Changes of the Java Crypto Roadmap (java.com/en/jre-jdk-cryptoroad) for more details.