qbittorrent 4.1.5，装在软路由上，软路由直接拔号，获取了内网 ipv4 和公网 ipv6，BT 下载时，tcpdump 发现对方是通过公网 IP 发送 UDP 包到我的 ipv4 内网地址的，一般 TCP 通过建立连接后这种现象是正常的，UDP 是无连接的，为什么他可以主动发送到我的内网 ipv4 的 BT 端口的？打洞洞？
16:41:19.728597 IP 60.109.50.*.47772 > 10.9.168.*.9982: UDP, length 1426
16:41:19.728601 IP 60.109.50.*.47772 > 10.9.168.*.9982: UDP, length 1426
16:41:19.728605 IP 60.109.50.*.47772 > 10.9.168.*.9982: UDP, length 1426
16:41:19.728609 IP 60.109.50.*.47772 > 10.9.168.*.9982: UDP, length 1426
16:41:19.728613 IP 60.109.50.*.47772 > 10.9.168.*.9982: UDP, length 1426
16:41:19.733553 IP 60.109.50.*.47772 > 10.9.168.*.9982: UDP, length 1426
16:41:19.733559 IP 60.109.50.*.47772 > 10.9.168.*.9982: UDP, length 1426
16:41:19.728597 IP 60.109.50.*.47772 > 10.9.168.*.9982: UDP, length 1426
16:41:19.728601 IP 60.109.50.*.47772 > 10.9.168.*.9982: UDP, length 1426
16:41:19.728605 IP 60.109.50.*.47772 > 10.9.168.*.9982: UDP, length 1426
16:41:19.728609 IP 60.109.50.*.47772 > 10.9.168.*.9982: UDP, length 1426
16:41:19.728613 IP 60.109.50.*.47772 > 10.9.168.*.9982: UDP, length 1426
16:41:19.733553 IP 60.109.50.*.47772 > 10.9.168.*.9982: UDP, length 1426
16:41:19.733559 IP 60.109.50.*.47772 > 10.9.168.*.9982: UDP, length 1426
1
Select Language