> For the complete documentation index, see [llms.txt](https://docs.deso.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.deso.org/deso-backend/configuration/web-security.md). # Web Security Description of flags related to your node's web security ## Access Control Allow Origins `--access-control-allow-origins` Type: String\[] Default: \["\*"] Accepts a comma-separated lists of origin domains that will be allowed as the Access-Control-Allow-Origin HTTP header. Defaults to \* if not set which allows all origin domains. ## Secure Header Development `--secure-header-development` Type: Boolean Default: true If set, runs our secure header middleware in development mode, which disables some of the options. The default is true to make it easy to run a node locally. See for more info. ## Secure Header Allow Hosts `--secure-header-allow-hosts` Type: String\[] Default: \[], This is the domain that our secure middleware will accept requests from. We also set the HTTP Access-Control-Allow-Origin ## --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://docs.deso.org/deso-backend/configuration/web-security.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.