HTTP/2 200 date: Mon, 14 Jul 2025 11:14:17 GMT content-type: application/xml cache-control: public, max-age=3600 cross-origin-opener-policy: same-origin expires: Mon, 14 Jul 2025 12:14:17 GMT referrer-policy: same-origin vary: Cookie, origin, Accept-Encoding x-content-type-options: nosniff x-frame-options: DENY x-resolution-methods: manual;auto;fallback x-resolution-outcomes: ;RfcAdapter: using docid IETF RFC 7857 -> using query @.type == "IETF" && @.primary == true && @.id == "RFC 7857" -> 1 found,; last-modified: Mon, 14 Jul 2025 11:14:17 GMT cf-cache-status: EXPIRED server: cloudflare cf-ray: 95f098677b37c7cf-BLR content-encoding: gzip alt-svc: h3=":443"; ma=86400 This document clarifies and updates several requirements of RFCs 4787, 5382, and 5508 based on operational and development experience. The focus of this document is Network Address Translation from IPv4 to IPv4 (NAT44). This document updates RFCs 4787, 5382, and 5508.