Session border controllers (SBCs) are an important part of the Internet infrastructure. Some of these session border controllers are split into media gateway controller (MGC) and media gateway (MG) components. One important function of an SBC is to perform traversal support for remote network address/port translation (NAT) devices in the IP communication path. Recommendation ITU‑T H.248.84 defines an additional tool for NAT traversal for peer-to-peer (P2P) services and an initial focus on TCP‑based applications.