{
  "id": "t13-l04-nat-idle-timers-and-split-tunnels",
  "title": "NAT, idle timers, and split tunnels",
  "checked": "2026-10",
  "sources": [
    {
      "label": "Technical requirements PDF",
      "url": "https://documentation-be.five9.com/bundle/five9-technical-requirements/raw/resource/enus/five9-technical-requirements.pdf",
      "kind": "vendor",
      "status": "ok",
      "lastChecked": "2026-10",
      "note": "Fetched for this lab in October 2026. Re-read before you buy hardware or open a firewall."
    },
    {
      "label": "RFC 1918",
      "url": "https://www.rfc-editor.org/rfc/rfc1918",
      "kind": "rfc",
      "status": "ok",
      "lastChecked": "2026-10"
    },
    {
      "label": "RFC 3261",
      "url": "https://www.rfc-editor.org/rfc/rfc3261",
      "kind": "rfc",
      "status": "ok",
      "lastChecked": "2026-10"
    },
    {
      "label": "RFC 3550, RTP",
      "url": "https://www.rfc-editor.org/rfc/rfc3550",
      "kind": "rfc",
      "status": "ok",
      "lastChecked": "2026-10"
    },
    {
      "label": "RFC 3551, RTP profile for audio and video",
      "url": "https://www.rfc-editor.org/rfc/rfc3551",
      "kind": "rfc",
      "status": "ok",
      "lastChecked": "2026-10"
    },
    {
      "label": "ITU-T G.711",
      "url": "https://www.itu.int/rec/T-REC-G.711",
      "kind": "standard",
      "status": "ok",
      "lastChecked": "2026-10"
    },
    {
      "label": "RFC 768, User Datagram Protocol",
      "url": "https://www.rfc-editor.org/rfc/rfc768",
      "kind": "rfc",
      "status": "ok",
      "lastChecked": "2026-10"
    },
    {
      "label": "RFC 4787, NAT behavior for UDP",
      "url": "https://www.rfc-editor.org/rfc/rfc4787",
      "kind": "rfc",
      "status": "ok",
      "lastChecked": "2026-10"
    }
  ]
}