{
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  "docId": "RFC8517",
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    "abstract": "This document summarizes an operator's perception of the benefits that may be provided by intermediary devices that execute functions beyond normal IP forwarding. Such intermediary devices are often called \"middleboxes\". RFC 3234 defines a taxonomy of middleboxes and issues in the Internet. Most of those middleboxes utilize or modify application- layer data. This document primarily focuses on devices that observe and act on information carried in the transport layer, and especially information carried in TCP packets.",
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    "authors": [
      {
        "name": "David Dolson"
      },
      {
        "name": "Juho Snellman"
      },
      {
        "name": "Mohamed Boucadair"
      },
      {
        "name": "Christian Jacquenet"
      }
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      "confidence": "high",
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      "updated": "2026-10-21T16:58:02.495Z",
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      "originalValue": null,
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      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8517/",
      "updated": "2026-10-21T16:58:02.495Z",
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      "confidence": "high",
      "note": "From the RFC index entry (rfc-index.xml <doc-id>)",
      "originalValue": null,
      "source": "parsed",
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      "updated": "2026-10-21T16:58:02.495Z",
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    "docTitle": "An Inventory of Transport-Centric Functions Provided by Middleboxes: An Operator Perspective",
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      "confidence": "high",
      "note": "Parsed from RFC index XML title",
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      "sourceUrl": "https://www.rfc-editor.org/info/rfc8517/",
      "updated": "2026-10-21T16:58:02.495Z",
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      "updated": "2026-10-21T16:58:02.495Z",
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    },
    "doi": "10.17487/RFC8517",
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      "confidence": "high",
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      "updated": "2026-10-21T16:58:02.495Z",
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    "href": "https://doi.org/10.17487/RFC8517",
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      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
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      "Address Sharing",
      "NAT",
      "Firewalls",
      "Service Function",
      "Transport",
      "Service Delivery",
      "Internet Architecture",
      "Path Layer UDP Substrate"
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    "keywords$meta": {
      "confidence": "high",
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      "originalValue": [
        "Address Sharing",
        "NAT",
        "Firewalls",
        "Service Function",
        "Transport",
        "Service Delivery",
        "Internet Architecture",
        "TCP QUIC",
        "Path Layer UDP Substrate"
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      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8517/",
      "updated": "2026-10-21T23:42:28.195Z",
      "version": "extractDocs.js@commit:cc353c041d14"
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    "pages": "21",
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      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8517/",
      "updated": "2026-10-21T16:58:02.495Z",
      "version": "extractDocs.js@commit:2c1e5418e9d0"
    },
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      "confidence": "high",
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      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8517/",
      "updated": "2026-10-21T16:58:02.495Z",
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    },
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      "confidence": "high",
      "note": "Static: provider",
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      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8517/",
      "updated": "2026-10-21T16:58:02.495Z",
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        "IETF.draft-ietf-dots-architecture-07",
        "IETF.draft-ietf-dots-signal-channel-25",
        "IETF.draft-trammell-plus-statefulness-04",
        "RFC2018",
        "RFC2827",
        "RFC2991",
        "RFC3135",
        "RFC3168",
        "RFC3234",
        "RFC3272",
        "RFC4594",
        "RFC4737",
        "RFC4787",
        "RFC5236",
        "RFC5853",
        "RFC5925",
        "RFC6092",
        "RFC6146",
        "RFC6269",
        "RFC6296",
        "RFC6333",
        "RFC6363",
        "RFC6459",
        "RFC6973",
        "RFC7323",
        "RFC7498",
        "RFC7596",
        "RFC7597",
        "RFC7690",
        "RFC7857",
        "RFC7974",
        "RFC8084",
        "RFC8404",
        "RFC8406",
        "IETF.draft-irtf-nwcrg-network-coding-satellites-02",
        "IETF.draft-ietf-tcpm-converters-04",
        "IETF.draft-ietf-sfc-use-case-mobility-08",
        "orphan/RFC8517/h:1d520b08"
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        "flag": "MIXED_REF_LAYOUT_RISK anchored=38 proseBlocks=53 skippedAnchorBlocks=43",
        "note": "Parsed from RFC HTML references/informative sections",
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        "source": "parsed",
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      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
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      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8517/",
      "updated": "2026-10-21T16:58:02.495Z",
      "version": "extractDocs.js@commit:2c1e5418e9d0"
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        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc8517/",
        "updated": "2026-10-21T16:58:02.495Z",
        "version": "extractDocs.js@commit:2c1e5418e9d0"
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        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc8517/",
        "updated": "2026-10-21T16:58:02.495Z",
        "version": "extractDocs.js@commit:2c1e5418e9d0"
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      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc8517/",
        "updated": "2026-10-21T16:58:02.495Z",
        "version": "extractDocs.js@commit:2c1e5418e9d0"
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        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc8517/",
        "updated": "2026-10-21T16:58:02.495Z",
        "version": "extractDocs.js@commit:2c1e5418e9d0"
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        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc8517/",
        "updated": "2026-10-21T16:58:02.495Z",
        "version": "extractDocs.js@commit:2c1e5418e9d0"
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}