Research · Tag · Rate_limiter_bypass

Posts tagged rate_limiter_bypass.

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RESEARCH
2026-07-22

One prior-knowledge h2c connection multiplexes N eth_getLogs past an L4 per-connection cap on go-ethereum's JSON-RPC port

go-ethereum's JSON-RPC port terminates cleartext HTTP/2 (h2c) by prior knowledge, so one TCP connection can multiplex N eth_getLogs streams past an L4 edge that only caps connections per IP (nginx stream limit_conn) — measured 20/20 streams and ~39 MB pulled through a single connection the edge counts as one, an amplification-multiplexing bypass of a connection cap, not of an L7 request rate limit.

Simon Morley
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