The iPad was on Tailscale
Summary
This article traces a hard-to-reproduce loading failure on an iPad to an interaction between WebRTC packet sizing and Tailscale’s handling of IPv6 fragments. The debugging path rules out WebKit, browser behavior, and message chunking before showing that large UDP payloads vanish when Tailscale encounters IPv6 fragments. The root cause comes down to a fixed MTU assumption in webrtc-rs combined with Tailscale’s IPv6 fragment dropping behavior. The write-up ends with the author filing issues for both projects and recommending conservative packet sizing or path probing for software that sends its own traffic.
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Networking and Cloud
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SaaS
Network Security Software
Zero Trust Networking
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Tailscale Inc.
$10M to $25M