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Rule Syntax

A Bifrost rule line combines a pattern with one or more operations and optional filters or line properties.

pattern operation [operations...] [filters...] [lineProps://...]

Examples

example.com host://127.0.0.1:3000
api.example.com reqHeaders://x-debug=1
chatgpt.com http3://
internal-api.example.test https://10.37.102.138:8080 upstreamUnsafeSsl://true
api.example.com/v1/users tlsIntercept:// host://127.0.0.1:3000

Rule Types

• Routing operations such as host://, proxy://, http://, https://, ws://, and wss:// decide where traffic goes.
• Modification operations such as reqHeaders://, resHeaders://, statusCode://, reqBody://, and resBody:// change traffic.
• Filters narrow when a rule applies.
• Line properties control metadata such as disabled or important status.

Read Operation reference and Rules protocol reference for details.