https://blog.imcaoxuan.cn/en/tags/tun/Recent content in TUN on CX's BlogHugoen-USimcaoxuan.cnFri, 23 Oct 2026 00:00:00 +0000https://blog.imcaoxuan.cn/en/posts/2026-10-23-ipv6-https-timeouts-after-enabling-sing-box-auto-redirect-on-armbian-troubleshooting-a-missing-loopback-address/Fri, 23 Oct 2026 00:00:00 +0000https://blog.imcaoxuan.cn/en/posts/2026-10-23-ipv6-https-timeouts-after-enabling-sing-box-auto-redirect-on-armbian-troubleshooting-a-missing-loopback-address/IPv6 ping works, but HTTPS times out in sing-box auto_redirect mode. The issue is diagnosed using nftables, tcpdump, and a check of the IPv6 loopback address.https://blog.imcaoxuan.cn/en/posts/2026-10-23-troubleshooting-ufw-and-sing-box-tun-auto-redirect-conflicts/Fri, 23 Oct 2026 00:00:00 +0000https://blog.imcaoxuan.cn/en/posts/2026-10-23-troubleshooting-ufw-and-sing-box-tun-auto-redirect-conflicts/通过 UFW 日志、nftables redirect 和 conntrack DNAT 状态，排查 Linux 旁路由透明代理动态端口被阻止的问题。