https://www.paolomainardi.com/tags/proxmox/Recent content in Proxmox on Paolo MainardiHugoenSun, 25 Oct 2026 00:00:00 +0000https://www.paolomainardi.com/posts/improve-tcp-streaming-jellyfin-tailscale-bbr/Sun, 25 Oct 2026 00:00:00 +0000https://www.paolomainardi.com/posts/improve-tcp-streaming-jellyfin-tailscale-bbr/<h2 id="tldr"> TL;DR <a class="heading-link" href="#tldr" aria-label="Link to heading"> <span aria-hidden="true">#</span> </a> </h2> <p>My <strong>Jellyfin</strong> server streams to an Apple TV in another city over <strong>Tailscale</strong>, and 4K files kept stalling. The tunnel was fine: a single TCP connection to the Apple TV crawled at <strong>17 to 22 Mbps</strong> because the path drops about 3% of packets, and <strong>CUBIC</strong>, the default Linux congestion control, reads every loss as congestion. Switching only the reverse proxy container to <strong><a href="https://queue.acm.org/detail.cfm?id=3022184" class="external-link" target="_blank" rel="noopener">BBR</a></strong> took the same connection to <strong>110 to 340 Mbps</strong>. One kernel module on the host, one sysctl in one container, no restart.</p>