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@@ -123,3 +123,7 @@ Of the currently undocumented APIs, the following are partially implemented:
   * `eth_getBlockByNumber` (issue #79)
   * `eth_syncing`
   * `net_peerCount`
+
+## Denial of Service
+
+Refer to `docs/denialofservice.md` for a collection of guides to help mitigate the issue.
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+# Denial of Service Guides
+
+The term **Denial of Service** (DoS) is a phrase that covers a wide range of security issues and vulnerabilities that impact availability.
+A comprehensive introduction and overview to a variety of DoS attacks can be found at [CloudFlare](https://www.cloudflare.com/learning/ddos/glossary/denial-of-service/).
+
+## Infrastructure Layer
+
+A good starting point in learning about general infrastructure hardening and DoS mitigations can be found at [OWASP](https://cheatsheetseries.owasp.org/cheatsheets/Denial_of_Service_Cheat_Sheet.html).
+
+- If you are running a node in a Docker container, read the [hardening guide](https://cheatsheetseries.owasp.org/cheatsheets/Docker_Security_Cheat_Sheet.html), particularly on [DoS avoidance](https://cheatsheetseries.owasp.org/cheatsheets/Docker_Security_Cheat_Sheet.html#rule-7-limit-resources-memory-cpu-file-descriptors-processes-restarts).
+- If you are running a node in the Cloud, consider reading the secure cloud [hardening guide](https://cheatsheetseries.owasp.org/cheatsheets/Secure_Cloud_Architecture_Cheat_Sheet.html), particularly on [DDoS protection](https://cheatsheetseries.owasp.org/cheatsheets/Secure_Cloud_Architecture_Cheat_Sheet.html#ddos-protection).
+
+## Network Layer
+
+- The P2P layer uses `libp2p`.
+They have published a set of useful guidelines on how to mitigate DoS issues in their [documentation](https://docs.libp2p.io/concepts/security/dos-mitigation/).
+- The RPC layer uses `jsonrpsee`.
+While they have incorporated some [DoS mitigation](https://github.com/paritytech/jsonrpsee/issues/203), it can still benefit from general REST [hardening strategies](https://cheatsheetseries.owasp.org/cheatsheets/REST_Security_Cheat_Sheet.html) published by OWASP.
+
+## Consensus Layer
+
+If the next Proposer can be predicted, it can be crippled with a targeted DoS attack. While *sentry nodes* are a short-term solution, the longer-term solution should be to implement some *single secret leader election* (SSLE) mechanism e.g.
+
+- [Whisk](https://ethresear.ch/t/whisk-a-practical-shuffle-based-ssle-protocol-for-ethereum/11763)
+- [Simplified SSLE](https://ethresear.ch/t/simplified-ssle/12315)
+- [Secret non-Single Leader Election](https://ethresear.ch/t/secret-non-single-leader-election/11789)
+
+One could be implemented in the future, when the need arises.
+
+## Application Layer
+
+There are many ways to make a Smart Contract unusable.
+It would be prudent to develop an understanding for the [Top-10 Smart Contact vulnerabilities](https://owasp.org/www-project-smart-contract-top-10/) published by OWASP.
+A collection of additional examples can also be found [here](https://solidity-by-example.org/hacks/denial-of-service/).
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