{
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    "abstract": "A number of security concerns with IP tunnels are documented in this memo. The intended audience of this document includes network administrators and future protocol developers. The primary intent of this document is to raise the awareness level regarding the security issues with IP tunnels as deployed and propose strategies for the mitigation of those issues. [STANDARDS-TRACK]",
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    "authors": [
      {
        "name": "Suresh Krishnan"
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      {
        "name": "Dave Thaler"
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      {
        "name": "James Hoagland"
      }
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      "updated": "2026-10-16T18:56:51.909Z",
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    "docLabel": "IETF RFC 6169",
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      "confidence": "high",
      "note": "Constructed from provider and document identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6169/",
      "updated": "2026-10-16T18:56:51.909Z",
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    "docNumber": "6169",
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      "confidence": "high",
      "note": "Parsed from RFC info page report metadata",
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      "updated": "2026-10-16T18:56:51.909Z",
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      "confidence": "high",
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      "source": "parsed",
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      "updated": "2026-10-16T18:56:51.909Z",
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      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
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      "updated": "2026-10-16T18:56:51.909Z",
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    },
    "doi": "10.17487/RFC6169",
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      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6169/",
      "updated": "2026-10-16T18:56:51.909Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "href": "https://doi.org/10.17487/RFC6169",
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      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6169/",
      "updated": "2026-10-16T18:56:51.909Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "pages": "20",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6169/",
      "updated": "2026-10-16T18:56:51.909Z",
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    },
    "publicationDate": "2011-04-01",
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      "confidence": "high",
      "note": "Parsed from RFC index XML date",
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      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6169/",
      "updated": "2026-10-16T18:56:51.909Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
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      "confidence": "high",
      "note": "Static: provider",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6169/",
      "updated": "2026-10-16T18:56:51.909Z",
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      "bibliographic": [
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        "RFC2661",
        "RFC2979",
        "RFC3056",
        "RFC3484",
        "RFC3931",
        "RFC3971",
        "RFC4380",
        "RFC4787",
        "RFC5095",
        "RFC5214",
        "RFC5389",
        "RFC5991",
        "RFC6056",
        "orphan/RFC6169/h:69ff8107",
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      "bibliographic$meta": {
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        "note": "Parsed from RFC HTML references/informative sections",
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      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
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        "confidence": "high",
        "note": "Derived from supersession relationship fields",
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        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6169/",
        "updated": "2026-10-16T18:56:51.909Z",
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        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
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        "source": "parsed",
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        "updated": "2026-10-16T18:56:51.909Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
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        "confidence": "high",
        "note": "Derived from supersession relationship fields",
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        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6169/",
        "updated": "2026-10-16T18:56:51.909Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
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      "statusNote": "Informational",
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        "confidence": "high",
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        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6169/",
        "updated": "2026-10-16T18:56:51.909Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
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      "superseded": false,
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        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6169/",
        "updated": "2026-10-16T18:56:51.909Z",
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