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rce addresses. ? solid lines : actual TCP packets ? dashed lines : messages sent between hosts and their STUNT Servers, or between themselves via Proxies. reference ? BIGGADIKE, A., FERULLO, D., WILSON, G., AND PERRIG, A. NATBLASTER: Establishing TCP connections between hosts behind NATs. In Proceedings of ACM SIGCOMM ASIA Workshop (Beijing, China, Apr. 2021). ? EPPINGER, J. L. TCP Connections for P2P Apps: A Software Approach to Solving the NAT Problem. Tech. Rep. CMUISRI05104, Carnegie Mellon University, Pittsburgh, PA, Jan. 2021. ? FORD, B., SRISURESH, P., AND KEGEL, D. Peertopeer munication across work address translators. In Proceedings of the 2021 USENIX Annual Technical Conference (Anaheim, CA, Apr. 2021). ? GUHA, S., TAKEDA, Y., AND FRANCIS, P. NUTSS: A SIPbased Approach to UDP and TCP Network Connectivity. In Proceedings of SIGCOMM’04 Workshops (Portland, OR, Aug. 2021), pp. 43–48. 3. STUN 的用途 1th UDP 測試 無應(yīng)答 禁止 UDP 有應(yīng)答 映射地址與源地址相同 映射地址與源地址不相同 2th UDP 測試 2th UDP 測試 Binding Request with change IP amp。 change port flags 無應(yīng)答 有應(yīng)答 In Inter 無應(yīng)答 1th UDP 測試 有應(yīng)答 Full Cone 應(yīng)答 IP不相同 Symmetric NAT 應(yīng)答 IP相同 3thUDP測試 Binding Request with only the change port flag 無應(yīng)答 Port Restricted 有應(yīng)答 Restricted Cone