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Also known as: NNTP over TLS, NNTP over SSL
NNTP wrapped in a TLS session from the moment the connection opens, conventionally on port 563. The encryption hides article contents, group names and login credentials from an ISP or anyone else watching the wire, at a small CPU cost on both ends. Commercial providers offer it on every account, and most newsreaders default to it rather than plaintext port 119.
Browse all terms in Protocol & Server Infrastructure, or see the full Usenet glossary.