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TLS Variables

Action Result Variables​

The following variables are made available for use in subsequent expressions and CEL interpolations after the action has run. Variable values will only apply to the last action execution, results are not concatenated.

Log​

NameTypeDescription
actions.ngrok.log.metadatamap[string]stringThe key-value map of metadata that was logged.

Restrict IPs​

NameTypeDescription
actions.ngrok.restrict_ips.actionstringThe resulting action for this action execution. Supported values are either allow or deny.
actions.ngrok.restrict_ips.matched_cidrstringThe CIDR that matched for the incoming client ip. This may be empty.
actions.ngrok.restrict_ips.error.codestringCode for an error that occurred during the invocation of an action.
actions.ngrok.restrict_ips.error.messagestringMessage for an error that occurred during the invocation of an action.

Connection Variables​

The following variables are available under the conn namespace:

NameTypeDescription
conn.client_ipstringSource IP of the connection to the ngrok endpoint.
conn.client_portint32Source port of the connection to the ngrok endpoint.
conn.server_ipstringThe IP that this connection was established on.
conn.server_portint32The port that this connection was established on.
conn.ts.starttimestampTimestamp when the connection to ngrok was started.

conn.client_ip​

Source IP of the connection to the ngrok endpoint.

# snippet
---
expressions:
  - "conn.client_ip in ['::1', '127.0.0.1']"

conn.client_port​

Source port of the connection to the ngrok endpoint.

# snippet
---
expressions:
  - "conn.client_port == 80"

conn.server_ip​

The IP that this connection was established on.

# snippet
---
expressions:
  - "conn.server_ip == '192.168.1.1'"

conn.server_port​

The port that this connection was established on.

# snippet
---
expressions:
  - "conn.server_port == 80"

conn.ts.start​

Timestamp when the connection to ngrok was started.

# snippet
---
expressions:
  - "conn.ts.start > timestamp('2023-12-31T00:00:00Z')"

Connection Geo Variables​

The following variables are available under the conn.geo namespace:

NameTypeDescription
conn.geo.citystringThe name of the city, in EN, where the conn.client_ip is likely to originate.
conn.geo.countrystringThe name of the country, in EN, where the conn.client_ip is likely to originate.
conn.geo.country_codestringThe two-letter ISO country code where the conn.client_ip is likely to originate.
conn.geo.latitudestringThe approximate latitude where the conn.client_ip is likely to originate.
conn.geo.longitudestringThe approximate longitude where the conn.client_ip is likely to originate.
conn.geo.radiusstringThe radius in kilometers around the latitude and longitude where the conn.client_ip is likely to originate.
conn.geo.subdivisionstringThe name of the subdivision, in EN, where the conn.client_ip is likely to originate.

conn.geo.city​

The name of the city, in EN, where the conn.client_ip is likely to originate.

# snippet
---
expressions:
  - "conn.geo.city == 'Strongsville'"

conn.geo.country​

The name of the country, in EN, where the conn.client_ip is likely to originate.

# snippet
---
expressions:
  - "conn.geo.country == 'United States'"

conn.geo.country_code​

The two-letter ISO country code where the conn.client_ip is likely to originate.

# snippet
---
expressions:
  - "conn.geo.country_code != 'US'"

conn.geo.latitude​

The approximate latitude where the conn.client_ip is likely to originate.

# snippet
---
expressions:
  - "double(conn.geo.latitude) >= 45.0"

conn.geo.longitude​

The approximate longitude where the conn.client_ip is likely to originate.

# snippet
---
expressions:
  - "double(conn.geo.longitude) <= -93.0"

conn.geo.radius​

The radius in kilometers around the latitude and longitude where the conn.client_ip is likely to originate.

# snippet
---
expressions:
  - "conn.geo.radius <= '5'"

conn.geo.subdivision​

The name of the subdivision, in EN, where the conn.client_ip is likely to originate.

# snippet
---
expressions:
  - "conn.geo.subdivision == 'California'"

Connection TLS Variables​

The following variables are available under the conn.tls namespace:

NameTypeDescription
conn.tls.cipher_suitestringThe cipher suite selected during the TLS handshake.
conn.tls.snistringThe hostname included in the ClientHello message via the SNI extension.
conn.tls.versionstringThe version of the TLS protocol used between the client and the ngrok edge.

conn.tls.cipher_suite​

The cipher suite selected during the TLS handshake.

# snippet
---
expressions:
  - "conn.tls.cipher_suite == 'TLS_AES_128_GCM_SHA256'"

conn.tls.sni​

The hostname included in the ClientHello message via the SNI extension.

# snippet
---
expressions:
  - "conn.tls.sni == 'client.example.com'"

conn.tls.version​

The version of the TLS protocol used between the client and the ngrok edge.

# snippet
---
expressions:
  - "conn.tls.version == '1.3'"

Connection TLS Client Variables​

The following variables are available under the conn.tls.client namespace:

NameTypeDescription
conn.tls.client.extensions[]ExtensionAdditional information added to the certificate.
conn.tls.client.extensions[i].idstringThe identifier (OID) that specifies the type of extension.
conn.tls.client.extensions[i].criticalboolTrue if the extension is critical.
conn.tls.client.extensions[i].value[]byteThe data for the extension.
conn.tls.client.issuerstringThe issuing authority of the certificate as a string roughly following the RFC 2253 Distinguished Names syntax.
conn.tls.client.issuer.common_namestringCommon name of the issuing authority, usually the domain name.
conn.tls.client.issuer.country[]stringCountry name(s) where the issuing authority is located.
conn.tls.client.issuer.locality[]stringLocality or city of the issuing authority.
conn.tls.client.issuer.organization[]stringName(s) of the organization that issued the certificate.
conn.tls.client.issuer.organizational_unit[]stringDivision of the organization responsible for the certificate.
conn.tls.client.issuer.postal_code[]stringPostal code of the issuing authority.
conn.tls.client.issuer.province[]stringProvince or state of the issuing authority.
conn.tls.client.issuer.street_address[]stringStreet address of the issuing authority.
conn.tls.client.sanstringSubject alternative names of the client certificate.
conn.tls.client.san.dns_names[]stringDNS names in the subject alternative names.
conn.tls.client.san.email_addresses[]stringEmail addresses in the subject alternative names.
conn.tls.client.san.ip_addresses[]stringIP addresses in the subject alternative names.
conn.tls.client.san.uris[]stringURIs in the subject alternative names.
conn.tls.client.serial_numberstringUnique identifier for the certificate.
conn.tls.client.signature_algorithmstringAlgorithm used to sign the certificate.
conn.tls.client.subjectstringThe entity to whom the certificate is issued as a string roughly following the RFC 2253 Distinguished Names syntax.
conn.tls.client.subject.common_namestringCommon name of the subject, usually the domain name.
conn.tls.client.subject.country[]stringCountry name(s) where the subject of the certificate is located.
conn.tls.client.subject.locality[]stringLocality or city where the subject is located.
conn.tls.client.subject.organization[]stringName(s) of the organization to which the subject belongs.
conn.tls.client.subject.organizational_unit[]stringDivision of the organization to which the subject belongs.
conn.tls.client.subject.postal_code[]stringPostal code where the subject is located.
conn.tls.client.subject.province[]stringProvince or state where the subject is located.
conn.tls.client.subject.street_address[]stringStreet address where the subject is located.
conn.tls.client.validity.not_aftertimestampExpiration date and time when the certificate is no longer valid.
conn.tls.client.validity.not_beforetimestampStart date and time when the certificate becomes valid.

conn.tls.client.extensions​

Additional information added to the certificate.

# snippet
---
expressions:
  - "size(conn.tls.client.extensions) > 0"

conn.tls.client.extensions[i].id​

The identifier (OID) that specifies the type of extension.

# snippet
---
expressions:
  - "conn.tls.client.extensions[0].id == '2.5.29.15'"

conn.tls.client.extensions[i].critical​

True if the extension is critical.

# snippet
---
expressions:
  - "conn.tls.client.extensions[0].critical"

conn.tls.client.extensions[i].value​

The data for the extension.

# snippet
---
expressions:
  - "conn.tls.client.extensions[0].value == b'\x03\x02\x05 '"

conn.tls.client.issuer​

The issuing authority of the certificate as a string roughly following the RFC 2253 Distinguished Names syntax.

# snippet
---
expressions:
  - "conn.tls.client.issuer == 'CN=E1,O=Let's Encrypt,C=US'"

conn.tls.client.issuer.common_name​

Common name of the issuing authority, usually the domain name.

# snippet
---
expressions:
  - "conn.tls.client.issuer.common_name == 'exampleca.com'"

conn.tls.client.issuer.country​

Country name(s) where the issuing authority is located.

# snippet
---
expressions:
  - "conn.tls.client.issuer.country == ['US']"

conn.tls.client.issuer.locality​

Locality or city of the issuing authority.

# snippet
---
expressions:
  - "conn.tls.client.issuer.locality == ['Mountain View']"

conn.tls.client.issuer.organization​

Name(s) of the organization that issued the certificate.

# snippet
---
expressions:
  - "conn.tls.client.issuer.organization == ['Example CA']"

conn.tls.client.issuer.organizational_unit​

Division of the organization responsible for the certificate.

# snippet
---
expressions:
  - "conn.tls.client.issuer.organizational_unit == ['Certification Authority
    Division']"

conn.tls.client.issuer.postal_code​

Postal code of the issuing authority.

# snippet
---
expressions:
  - "conn.tls.client.issuer.postal_code == ['94043']"

conn.tls.client.issuer.province​

Province or state of the issuing authority.

# snippet
---
expressions:
  - "conn.tls.client.issuer.province == ['California']"

conn.tls.client.issuer.street_address​

Street address of the issuing authority.

# snippet
---
expressions:
  - "conn.tls.client.issuer.street_address == ['1234 Encryption Way']"

conn.tls.client.san​

Subject alternative names of the client certificate.

# snippet
---
expressions:
  - "conn.tls.client.san == 'DNS:www.example.com, DNS:example.com, IP
    Address:192.168.1.1'"

conn.tls.client.san.dns_names​

DNS names in the subject alternative names.

# snippet
---
expressions:
  - "conn.tls.client.san.dns_names == ['www.example.com', 'example.com']"

conn.tls.client.san.email_addresses​

Email addresses in the subject alternative names.

# snippet
---
expressions:
  - "conn.tls.client.san.email_addresses == ['ngrok-email1@example.com',
    'ngrok-email2@example.com']"

conn.tls.client.san.ip_addresses​

IP addresses in the subject alternative names.

# snippet
---
expressions:
  - "conn.tls.client.san.ip_addresses == ['192.168.1.1']"

conn.tls.client.san.uris​

URIs in the subject alternative names.

# snippet
---
expressions:
  - "conn.tls.client.san.uris == ['https://example.com/example']"

conn.tls.client.serial_number​

Unique identifier for the certificate.

# snippet
---
expressions:
  - "conn.tls.client.serial_number == 'b53017e79d4a5208b314a55d3574e0a8'"

conn.tls.client.signature_algorithm​

Algorithm used to sign the certificate.

# snippet
---
expressions:
  - "conn.tls.client.signature_algorithm == 'SHA256-RSA'"

conn.tls.client.subject​

The entity to whom the certificate is issued as a string roughly following the RFC 2253 Distinguished Names syntax.

# snippet
---
expressions:
  - "conn.tls.client.subject == 'CN=www.example.com'"

conn.tls.client.subject.common_name​

Common name of the subject, usually the domain name.

# snippet
---
expressions:
  - "conn.tls.client.subject.common_name == 'www.example.com'"

conn.tls.client.subject.country​

Country name(s) where the subject of the certificate is located.

# snippet
---
expressions:
  - "conn.tls.client.subject.country == ['US']"

conn.tls.client.subject.locality​

Locality or city where the subject is located.

# snippet
---
expressions:
  - "conn.tls.client.subject.locality == ['Mountain View']"

conn.tls.client.subject.organization​

Name(s) of the organization to which the subject belongs.

# snippet
---
expressions:
  - "conn.tls.client.subject.organization == ['Example Corp']"

conn.tls.client.subject.organizational_unit​

Division of the organization to which the subject belongs.

# snippet
---
expressions:
  - "conn.tls.client.subject.organizational_unit == ['Web Services']"

conn.tls.client.subject.postal_code​

Postal code where the subject is located.

# snippet
---
expressions:
  - "conn.tls.client.subject.postal_code == ['94043']"

conn.tls.client.subject.province​

Province or state where the subject is located.

# snippet
---
expressions:
  - "conn.tls.client.subject.province == ['California']"

conn.tls.client.subject.street_address​

Street address where the subject is located.

# snippet
---
expressions:
  - "conn.tls.client.subject.street_address == ['1234 Secure Blvd']"

conn.tls.client.validity.not_after​

Expiration date and time when the certificate is no longer valid.

# snippet
---
expressions:
  - "conn.tls.client.validity.not_after == timestamp('2023-01-01T00:00:00Z')"

conn.tls.client.validity.not_before​

Start date and time when the certificate becomes valid.

# snippet
---
expressions:
  - "conn.tls.client.validity.not_before == timestamp('2020-01-01T00:00:00Z')"

Connection TLS Server Variables​

The following variables are available under the conn.tls.server namespace:

NameTypeDescription
conn.tls.server.extensions[]ExtensionAdditional information added to the certificate.
conn.tls.server.extensions[i].idstringThe identifier that specifies the type of extension.
conn.tls.server.extensions[i].criticalboolTrue if the extension is critical.
conn.tls.server.extensions[i].value[]byteThe data for the extension.
conn.tls.server.issuerstringThe issuing authority of the certificate as a string roughly following the RFC 2253 Distinguished Names syntax.
conn.tls.server.issuer.common_namestringCommon name of the issuing authority, usually the domain name.
conn.tls.server.issuer.country[]stringCountry name(s) where the issuing authority is located.
conn.tls.server.issuer.locality[]stringLocality or city of the issuing authority.
conn.tls.server.issuer.organization[]stringName(s) of the organization that issued the certificate.
conn.tls.server.issuer.organizational_unit[]stringDivision of the organization responsible for the certificate.
conn.tls.server.issuer.postal_code[]stringPostal code of the issuing authority.
conn.tls.server.issuer.province[]stringProvince or state of the issuing authority.
conn.tls.server.issuer.street_address[]stringStreet address of the issuing authority.
conn.tls.server.sanstringSubject alternative names of the ngrok server's leaf TLS certificate.
conn.tls.server.san.dns_names[]stringDNS names in the subject alternative names of the ngrok server's leaf TLS certificate.
conn.tls.server.san.email_addresses[]stringEmail addresses in the subject alternative names of the ngrok server's leaf TLS certificate.
conn.tls.server.san.ip_addresses[]stringIP addresses in the subject alternative names of the ngrok server's leaf TLS certificate.
conn.tls.server.san.uris[]stringURIs in the subject alternative names of the ngrok server's leaf TLS certificate.
conn.tls.server.serial_numberstringUnique identifier for the certificate.
conn.tls.server.signature_algorithmstringAlgorithm used to sign the certificate.
conn.tls.server.subjectstringThe entity to whom the certificate is issued as a string roughly following the RFC 2253 Distinguished Names syntax.
conn.tls.server.subject.common_namestringCommon name of the subject, usually the domain name.
conn.tls.server.subject.country[]stringCountry name(s) where the subject of the certificate is located.
conn.tls.server.subject.locality[]stringLocality or city where the subject is located.
conn.tls.server.subject.organization[]stringName(s) of the organization to which the subject belongs.
conn.tls.server.subject.organizational_unit[]stringDivision of the organization to which the subject belongs.
conn.tls.server.subject.postal_code[]stringPostal code where the subject is located.
conn.tls.server.subject.province[]stringProvince or state where the subject is located.
conn.tls.server.subject.street_address[]stringStreet address where the subject is located.
conn.tls.server.validity.not_aftertimestampExpiration date and time when the certificate is no longer valid.
conn.tls.server.validity.not_beforetimestampStart date and time when the certificate becomes valid.

conn.tls.server.extensions​

Additional information added to the certificate.

# snippet
---
expressions:
  - "size(conn.tls.server.extensions) > 0"

conn.tls.server.extensions[i].id​

The identifier that specifies the type of extension.

# snippet
---
expressions:
  - "conn.tls.server.extensions[0].id == '2.5.29.15'"

conn.tls.server.extensions[i].critical​

True if the extension is critical.

# snippet
---
expressions:
  - "conn.tls.server.extensions[0].critical"

conn.tls.server.extensions[i].value​

The data for the extension.

# snippet
---
expressions:
  - "conn.tls.server.extensions[0].value == b'\x03\x02\x05 '"

conn.tls.server.issuer​

The issuing authority of the certificate as a string roughly following the RFC 2253 Distinguished Names syntax.

# snippet
---
expressions:
  - "conn.tls.server.issuer == 'CN=E1,O=Let's Encrypt,C=US'"

conn.tls.server.issuer.common_name​

Common name of the issuing authority, usually the domain name.

# snippet
---
expressions:
  - "conn.tls.server.issuer.common_name == 'exampleca.com'"

conn.tls.server.issuer.country​

Country name(s) where the issuing authority is located.

# snippet
---
expressions:
  - "conn.tls.server.issuer.country == ['US']"

conn.tls.server.issuer.locality​

Locality or city of the issuing authority.

# snippet
---
expressions:
  - "conn.tls.server.issuer.locality == ['Mountain View']"

conn.tls.server.issuer.organization​

Name(s) of the organization that issued the certificate.

# snippet
---
expressions:
  - "conn.tls.server.issuer.organization == ['Example CA']"

conn.tls.server.issuer.organizational_unit​

Division of the organization responsible for the certificate.

# snippet
---
expressions:
  - "conn.tls.server.issuer.organizational_unit == ['Certification Authority
    Division']"

conn.tls.server.issuer.postal_code​

Postal code of the issuing authority.

# snippet
---
expressions:
  - "conn.tls.server.issuer.postal_code == ['94043']"

conn.tls.server.issuer.province​

Province or state of the issuing authority.

# snippet
---
expressions:
  - "conn.tls.server.issuer.province == ['California']"

conn.tls.server.issuer.street_address​

Street address of the issuing authority.

# snippet
---
expressions:
  - "conn.tls.server.issuer.street_address == ['1234 Encryption Way']"

conn.tls.server.san​

Subject alternative names of the server certificate of the ngrok server's leaf TLS certificate.

# snippet
---
expressions:
  - "conn.tls.server.san == 'DNS:www.example.com, DNS:example.com, IP
    Address:192.168.1.1'"

conn.tls.server.san.dns_names​

DNS names in the subject alternative names of the ngrok server's leaf TLS certificate.

# snippet
---
expressions:
  - "conn.tls.server.san.dns_names == ['ngrok-dns.com', 'ngrok-dns2.com']"

conn.tls.server.san.email_addresses​

Email addresses in the subject alternative names of the ngrok server's leaf TLS certificate.

# snippet
---
expressions:
  - "conn.tls.server.san.email_addresses == ['ngrok-email1@example.com',
    'ngrok-email2@example.com']"

conn.tls.server.san.ip_addresses​

IP addresses in the subject alternative names of the ngrok server's leaf TLS certificate.

# snippet
---
expressions:
  - "conn.tls.server.san.ip_addresses == ['192.168.1.1']"

conn.tls.server.san.uris​

URIs in the subject alternative names of the ngrok server's leaf TLS certificate.

# snippet
---
expressions:
  - "conn.tls.server.san.uris == ['https://example.com/example']"

conn.tls.server.serial_number​

Unique identifier for the certificate.

# snippet
---
expressions:
  - "conn.tls.server.serial_number == 'b53017e79d4a5208b314a55d3574e0a8'"

conn.tls.server.signature_algorithm​

Algorithm used to sign the certificate.

# snippet
---
expressions:
  - "conn.tls.server.signature_algorithm == 'SHA256-RSA'"

conn.tls.server.subject​

The entity to whom the certificate is issued as a string roughly following the RFC 2253 Distinguished Names syntax.

# snippet
---
expressions:
  - "conn.tls.server.subject == 'CN=www.example.com'"

conn.tls.server.subject.common_name​

Common name of the subject, usually the domain name.

# snippet
---
expressions:
  - "conn.tls.server.subject.common_name == 'ngrok-server.example.com'"

conn.tls.server.subject.country​

Country name(s) where the subject of the certificate is located.

# snippet
---
expressions:
  - "conn.tls.server.subject.country == ['US']"

conn.tls.server.subject.locality​

Locality or city where the subject is located.

# snippet
---
expressions:
  - "conn.tls.server.subject.locality == ['Mountain View']"

conn.tls.server.subject.organization​

Name(s) of the organization to which the subject belongs.

# snippet
---
expressions:
  - "conn.tls.server.subject.organization == ['Example Corp']"

conn.tls.server.subject.organizational_unit​

Division of the organization to which the subject belongs.

# snippet
---
expressions:
  - "conn.tls.server.subject.organizational_unit == ['Web Services']"

conn.tls.server.subject.postal_code​

Postal code where the subject is located.

# snippet
---
expressions:
  - "conn.tls.server.subject.postal_code == ['94043']"

conn.tls.server.subject.province​

Province or state where the subject is located.

# snippet
---
expressions:
  - "conn.tls.server.subject.province == ['California']"

conn.tls.server.subject.street_address​

Street address where the subject is located.

# snippet
---
expressions:
  - "conn.tls.server.subject.street_address == ['1234 Secure Blvd']"

conn.tls.server.validity.not_after​

Expiration date and time when the certificate is no longer valid.

# snippet
---
expressions:
  - "conn.tls.server.validity.not_after > timestamp('2023-01-01T00:00:00Z')"

conn.tls.server.validity.not_before​

Start date and time when the certificate becomes valid.

# snippet
---
expressions:
  - "conn.tls.server.validity.not_before < timestamp('2020-01-01T00:00:00Z')"

Endpoint Variables​

The following variables are available under the endpoint namespace:

NameTypeDescription
endpoint.addrstringThe address for this endpoint.
endpoint.hoststringThe hostname for this endpoint.
endpoint.idstringThe endpoint that serviced this connection.
endpoint.portint32The port for this endpoint.
endpoint.protocolstringThe protocol for this endpoint. Current supported values are http, https, tcp, and tls.
endpoint.urlstringThe url for this endpoint.

endpoint.addr​

The address for this endpoint.

# snippet
---
expressions:
  - "endpoint.addr == 'my-subdomain.ngrok.app:443'"

endpoint.host​

The hostname for this endpoint.

# snippet
---
expressions:
  - "endpoint.host == 'my-subdomain.ngrok.app'"

endpoint.id​

The id for this endpoint.

# snippet
---
expressions:
  - "endpoint.id == 'ep_2iL8LRbQilSCKYjaslRoqBwJcfT'"

endpoint.port​

The port for this endpoint.

# snippet
---
expressions:
  - "endpoint.port == 443"

endpoint.protocol​

The protocol for this endpoint. Current supported values are http, https, tcp, and tls.

# snippet
---
expressions:
  - "endpoint.protocol == 'https'"

endpoint.url​

The url for this endpoint.

# snippet
---
expressions:
  - "endpoint.url == 'https://my-subdomain.ngrok.app'"

Time variables​

The following variables are available under the time namespace:

NameTypeDescription
time.nowstringThe current UTC time in RFC3339 format.

time.now​

The current UTC time in RFC3339 format.

# snippet
---
expressions:
  - "conn.ts.end < timestamp(time.now)"