How Can I Use RFCs?

RFCs are freely available to download, copy, publish, display, and distribute, in a variety of formats, under a license granted by the IETF Trust. This license, the Trust Legal Provisions, has some important restrictions, including a prohibition on modification of RFCs outside of the IETF Standards Process.

RFCs are not guaranteed to be patent-free and anyone interested in the Intellectual Property Rights (IPR) constraints on a specific document should consult the IETF's IPR disclosure database, though this is not guaranteed to be a complete record of applicable patents.

You may download RFCs via rsync.