{"record":{"id":"2109afe41c1e3395","repo":"juanfont/headscale","slug":"autogroup-self-not-valid-on-the-src-side-of-a-ru","errorCode":null,"errorMessage":"\"autogroup:self\" not valid on the src side of a rule","messagePattern":"\"autogroup:self\" not valid on the src side of a rule","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"hscontrol/policy/v2/types.go","lineNumber":136,"sourceCode":"\tErrHostportMissingColon        = errors.New(\"hostport must contain a colon\")\n\tErrTypeNotSupported            = errors.New(\"type not supported\")\n\tErrInvalidAlias                = errors.New(\"invalid alias format\")\n\tErrInvalidAutoApprover         = errors.New(\"invalid auto approver format\")\n\tErrInvalidOwner                = errors.New(\"invalid owner format\")\n\tErrGroupNotDefined             = errors.New(\"group not defined in policy\")\n\tErrInvalidGroupMember          = errors.New(\"invalid group member type\")\n\tErrGroupValueNotArray          = errors.New(\"group value must be an array of users\")\n\tErrInvalidHostIP               = errors.New(\"hostname contains invalid IP address\")\n\tErrTagNotDefined               = errors.New(\"tag not found\")\n\tErrAutoApproverNotAlias        = errors.New(\"auto approver is not an alias\")\n\tErrInvalidACLAction            = errors.New(\"invalid ACL action\")\n\tErrInvalidSSHAction            = errors.New(\"invalid SSH action\")\n\tErrInvalidProtocolNumber       = errors.New(\"invalid protocol number\")\n\tErrProtocolLeadingZero         = errors.New(\"leading 0 not permitted in protocol number\")\n\tErrProtocolOutOfRange          = errors.New(\"protocol number out of range (0-255)\")\n\tErrAutogroupNotSupported       = errors.New(\"autogroup not supported in headscale\")\n\tErrAutogroupInternetSrc        = errors.New(\"autogroup:internet can only be used in ACL destinations\")\n\tErrAutogroupSelfSrc            = errors.New(\"\\\"autogroup:self\\\" not valid on the src side of a rule\")\n\tErrAutogroupNotSupportedACLSrc = errors.New(\"autogroup not supported for ACL sources\")\n\tErrAutogroupNotSupportedACLDst = errors.New(\"autogroup not supported for ACL destinations\")\n\tErrAutogroupDangerAllDst       = errors.New(\"cannot use autogroup:danger-all as a dst\")\n\tErrAutogroupNotSupportedSSHSrc = errors.New(\"autogroup not supported for SSH sources\")\n\tErrAutogroupNotSupportedSSHDst = errors.New(\"autogroup not supported for SSH destinations\")\n\tErrHostNotDefined              = errors.New(\"host not defined in policy\")\n\tErrSSHSourceAliasNotSupported  = errors.New(\"alias not supported for SSH source\")\n\tErrSSHDestAliasNotSupported    = errors.New(\"alias not supported for SSH destination\")\n\tErrUnknownField                = errors.New(\"unknown field\")\n\tErrProtocolNoSpecificPorts     = errors.New(\"protocol does not support specific ports\")\n\tErrTestEmptyAssertions         = errors.New(\"test entry must have at least one of \\\"accept\\\" or \\\"deny\\\"\")\n\tErrTestProtocolNotAllowed      = errors.New(\"test protocol must be tcp, udp, sctp, or empty\")\n\tErrTestDestinationMultiPort    = errors.New(\"test destination port must be a single port\")\n\tErrTestDestinationCIDR         = errors.New(\"test destination must be a single host, not a CIDR range\")\n\tErrAutogroupInternetTestDst    = errors.New(\"autogroup:internet not valid as a test destination\")\n\tErrSSHTestEmptySrc             = errors.New(\"SSH tests entry must have a non-empty src\")\n\tErrSSHTestEmptyDst             = errors.New(\"SSH tests entry must have at least one dst\")\n\tErrSSHTestDstUnknownTag        = errors.New(\"SSH tests dst contains unknown tag\")","sourceCodeStart":118,"sourceCodeEnd":154,"githubUrl":"https://github.com/juanfont/headscale/blob/565fd254d06c4c7f9a8cad1714a43445c79ba420/hscontrol/policy/v2/types.go#L118-L154","documentation":"Returned by validateAutogroupForSrc (hscontrol/policy/v2/types.go:2042) when autogroup:self appears on the src side of an ACL rule. autogroup:self means 'the requesting node itself' and is only meaningful in destinations, where it grants each node access to its own ports; as a source it would be a no-op tautology and Tailscale/headscale reject it.","triggerScenarios":"Policy with \"acls\": [{\"action\": \"accept\", \"src\": [\"autogroup:self\"], \"dst\": [\"*:80\"]}]. Any ACL rule listing autogroup:self under src triggers this during Policy.validate.","commonSituations":"Trying to express 'a node can act as a source for itself' (already implicit), or copy-pasting a dst-focused self rule into src. Users modeling per-node permissions often land here before learning the self-as-dst idiom.","solutions":["Remove autogroup:self from src; sources should name users, groups, tags, hosts, or autogroup:member/tagged/danger-all","For 'each node may talk to itself', put autogroup:self on the dst side: src [\"*\"], dst [\"autogroup:self:*\"]"],"exampleFix":"// before\n{\"action\": \"accept\", \"proto\": \"tcp\", \"src\": [\"autogroup:self\"], \"dst\": [\"*:80\"]}\n\n// after\n{\"action\": \"accept\", \"proto\": \"tcp\", \"src\": [\"*\"], \"dst\": [\"autogroup:self:80\"]}","handlingStrategy":"validation","validationCode":"for _, acl := range acls {\n\tfor _, s := range acl.Src {\n\t\tif s == \"autogroup:self\" {\n\t\t\treturn errors.New(\"autogroup:self not valid on src\")\n\t\t}\n\t}\n}","typeGuard":"func isAutogroupSelfSrc(err error) bool {\n\treturn errors.Is(err, policy.ErrAutogroupSelfSrc)\n}","tryCatchPattern":"if err := p.Validate(); err != nil {\n\tif errors.Is(err, policy.ErrAutogroupSelfSrc) {\n\t\treturn fmt.Errorf(\"remove autogroup:self from src; use it in dst for self-access: %w\", err)\n\t}\n\treturn err\n}","preventionTips":["Learn the self-as-dst idiom: src [\"*\"], dst [\"autogroup:self:port\"]","Sources should name who/what initiates; 'self' adds nothing there","Copy proven rule patterns instead of recombining autogroups experimentally"],"tags":["policy","autogroup","acl","validation"],"backgroundTag":null,"analyzedSha":"565fd254d06c4c7f9a8cad1714a43445c79ba420","analyzedAt":"2026-08-15T13:12:30.133Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}