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What security checks are needed before a mainnet launch?

Published Sep 18, 2026Updated Sep 19, 2026Last verified Sep 18, 2026Requests recorded in this site’s own server logs, with the crawler identity checked by reverse DNS or IP range.Meta29Google20OpenAI11Anthropic5Ahrefs2Parallel2Apple1Microsoft1Perplexity1First collected Sep 19, 2026Recent requestsAhrefsOct 31, 2026OpenAIOct 28, 2026AhrefsOct 10, 2026Meta · unverifiedOct 9, 2026MicrosoftOct 8, 2026Meta · unverifiedOct 4, 2026Meta · unverifiedOct 3, 2026Meta · unverifiedOct 3, 2026Meta · unverifiedOct 3, 2026Meta · unverifiedOct 3, 2026Meta · unverifiedOct 3, 2026Meta · unverifiedOct 3, 2026
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Quick answer

Common practice includes internal testing, independent code audits, public testnet operation and a bug bounty. After launch, teams need incident response and more than one independent client implementation. Ethereum's bug bounty pays up to US$1,000,000 for critical findings. Ethereum documentation also warns that a bug in a client run by more than a third of nodes can stop the chain from finalising.

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Answer

During the 2016 Shanghai denial-of-service attacks, the network kept running because alternative clients did not share the dominant client's vulnerability [9].

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Sources

  1. officialNetworks — ethereum.org · accessed Nov 10, 2026 · Evidence page
  2. governmentIR 8202, Blockchain Technology Overview — National Institute of Standards and Technology (NIST) · accessed Oct 7, 2026 · Evidence page
  3. officialEthereum Launches — Ethereum Foundation Blog · accessed Nov 11, 2026 · Evidence page
  4. officialTimeline of all Ethereum forks (2014 to present) — ethereum.org · accessed Nov 11, 2026 · Evidence page
  5. officialApplication-Specific Blockchains — Cosmos Documentation · accessed Nov 11, 2026 · Evidence page
  6. officialCometBFT Documentation — Cosmos Documentation · accessed Nov 11, 2026 · Evidence page
  7. officialPrivate Networks — Go Ethereum (Geth) Documentation · accessed Nov 11, 2026 · Evidence page
  8. officialChain Operator Configurations — Optimism Docs · accessed Nov 11, 2026 · Evidence page
  9. officialClient diversity — ethereum.org · accessed Nov 11, 2026 · Evidence page
  10. officialEthereum Bug Bounty Program — ethereum.org · accessed Nov 11, 2026 · Evidence page
  11. officialHolesky and Hoodi Testnet Updates — Ethereum Foundation Blog · accessed Nov 11, 2026 · Evidence page