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Synthetic monitoring response codes

Synthetic monitors returns a number of additional response codes beyond standard HTTP response codes, visible in the Resources page. These response codes are based on Chromium's response codes and give you more detail on the behavior of your monitors.

Response codes

Synthetic monitoring returns the following additional response codes:

Response Code

Definition

-2

net::ERR_FAILED, "Generic network error"

-3

net::ERR_ABORTED, "An operation was aborted (due to user action)" A Chrome-specific response code when the script hits a timeout and the runner is shutting down. To do that, the runner ends all pending requests.

-7

net::ERR_TIMED_OUT, "Timed out"

-10

net::ERR_ACCESS_DENIED, "Access denied"

-20

net::ERR_BLOCKED_BY_CLIENT, "Blocked"

-100

net::ERR_CONNECTION_CLOSED, "Connection was closed (TCP FIN)"

-101

net::ERR_CONNECTION_RESET, "Connection was reset (TCP RST)"

-102

net::ERR_CONNECTION_REFUSED, "Connection was refused"

-103

net::ERR_CONNECTION_ABORTED, "Connection was aborted (no ACK received)"

-104

net::ERR_CONNECTION_FAILED, "Connection attempt failed"

-105

net::ERR_NAME_NOT_RESOLVED, "Host name could not be resolved"

-106

net::ERR_INTERNET_DISCONNECTED, "Internet connection lost"

-107

net::ERR_SSL_PROTOCOL_ERROR, "SSL protocol error"

-108

net::ERR_ADDRESS_INVALID, "Invalid IP address and/or port number"

-109

net::ERR_ADDRESS_UNREACHABLE, "Unreachable IP address"

-110

net::ERR_SSL_CLIENT_AUTH_CERT_NEEDED, "Server requested a client certificate for SSL client authentication"

-112

net::ERR_NO_SSL_VERSIONS_ENABLED, "No SSL protocol versions are enabled"

-113

net::ERR_SSL_VERSION_OR_CIPHER_MISMATCH, "Client and server don't support a common SSL protocol version or cipher suite"

-114

net::ERR_SSL_RENEGOTIATION_REQUESTED, "Server requested a renegotiation (re-handshake)"

-116

net::ERR_CERT_ERROR_IN_SSL_RENEGOTIATION, "During SSL renegotiation (re-handshake), the server sent a certificate with an error"

-117

net::ERR_BAD_SSL_CLIENT_AUTH_CERT, "SSL handshake failed because of a bad or missing client certificate"

-118

net::ERR_CONNECTION_TIMED_OUT, "Timed out"

-123

net::ERR_SSL_NO_RENEGOTIATION, "Peer sent an SSL no_renegotiation alert message"

-138

net::ERR_ACCESS_DENIED, "Access denied"

-141

net::ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED, "Unable to sign the CertificateVerify data of an SSL client auth handshake with the client certificate's private key"

-145

net::ERR_WS_PROTOCOL_ERROR, "WebSocket protocol error - connection terminated due to a malformed frame or other protocol violation"

-147

net::ERR_ADDRESS_IN_USE, "Failed to bind to an address because already in use"

-148

net::ERR_SSL_HANDSHAKE_NOT_COMPLETED, "SSL handshake has not completed"

-149

net::ERR_SSL_BAD_PEER_PUBLIC_KEY, "SSL peer's public key is invalid"

-150

net::ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAIN, "Certificate didn't match built-in public key pins for the host name"

-151

net::ERR_CLIENT_AUTH_CERT_TYPE_UNSUPPORTED, "Server request for client certificate did not contain any types we support"

-152

net::ERR_ORIGIN_BOUND_CERT_GENERATION_TYPE_MISMATCH, "Server requested one type of cert, then requested a different type while the first was still being generated"

-153

net::ERR_SSL_DECRYPT_ERROR_ALERT, "SSL peer sent us a fatal decrypt_error alert"

-156

net::ERR_SSL_SERVER_CERT_CHANGED, "SSL server certificate changed in a renegotiation"

-157

net::ERR_SSL_INAPPROPRIATE_FALLBACK, "SSL server indicated that an unnecessary TLS version fallback was performed"

-158

net::ERR_CT_NO_SCTS_VERIFIED_OK, "All Signed Certificate Timestamps failed to verify"

-159

net::ERR_SSL_UNRECOGNIZED_NAME_ALERT, "SSL server sent us a fatal unrecognized_name alert"

-164

net::ERR_SSL_CLIENT_AUTH_CERT_BAD_FORMAT, "Failed to import a client certificate from the platform store into the SSL library"

-165

net::ERR_SSL_FALLBACK_BEYOND_MINIMUM_VERSION", "SSL server requires falling back to a version older than the configured minimum fallback version"

-166

net::ERR_ICANN_NAME_COLLISION", "Resolving a hostname to an IP address list included the IPv4 address \"127.0.53.53\". This is a special IP address which ICANN has recommended to indicate there was a name collision, and alert admins to a potential problem"

-200

net::ERR_CERT_COMMON_NAME_INVALID, "Server responded with a certificate whose common name did not match the host name"

-201

net::ERR_CERT_DATE_INVALID", "Server responded with a certificate that is either expired or not valid yet"

-202

net::ERR_CERT_AUTHORITY_INVALID, "Server responsde with a certificate signed by an untrusted authority"

-203

net::ERR_CERT_CONTAINS_ERRORS", "Server responded with a certificate that contains errors"

-204

net::ERR_CERT_NO_REVOCATION_MECHANISM, "Certificate has no mechanism for determining if it is revoked"

-205

net::ERR_CERT_UNABLE_TO_CHECK_REVOCATION", "Revocation information for the security certificate for this site is not available"

-206

net::ERR_CERT_REVOKED, "Server responded with a certificate that has been revoked"

-207

net::ERR_CERT_INVALID, "Server responded with a certificate that is invalid"

-208

net::ERR_CERT_WEAK_SIGNATURE_ALGORITHM, "server responded with a certificate that is signed using a weak signature algorithm"

-210

net::ERR_CERT_NON_UNIQUE_NAME, "Host name specified in the certificate is not unique"

-211

net::ERR_CERT_WEAK_KEY, "Server responded with a certificate that contains a weak key"

-212

net::ERR_CERT_NAME_CONSTRAINT_VIOLATION, "Certificate claimed DNS names that are in violation of name constraints"

-213

net::ERR_CERT_VALIDITY_TOO_LONG, "Certificate's validity period is too long"

-324

net::ERR_EMPTY_RESPONSE, "Server closed the connection without sending any data"

-803

net::ERR_DNS_TIMED_OUT, "DNS lookup timed out"

-9999

"unknown error, error not mapped"

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