Extending a trust boundary between cloud domains of the same entity
A network protocol and architecture for extending trust between cloud domains of a same entity comprises adding, by egress logic executing on a first server, authentication information to a packet leaving a first cloud domain of the entity to indicate a source of the packet. The egress logic allows the packet to traverse to a target cloud domain of the entity. Ingress logic executing on a second server at the target cloud domain intercepts the packet and performs validation of the authentication information. Responsive to the authentication information passing validation, the ingress logic determines that the first cloud domain is trusted and allows the packet to proceed to a destination. Responsive to the authentication information failing validation, the ingress logic rejects the packet.
1 . A computer-implemented method comprising:
intercepting, by one or more computing devices at a target cloud domain of an entity, a packet from a source cloud domain received from a public network, wherein the packet includes an implicit certificate having authentication information indicating the cloud domain source of the packet, the authentication information having been added to the packet by egress logic associated with the source cloud domain;
determining, by the one or more computing devices at the target cloud domain, whether the source cloud domain resides within the entity;
in response to determining that the source cloud domain resides within the entity, automatically trusting the packet and forwarding the packet to a destination; and
in response to determining that the source cloud domain resides outside the entity:
extracting, by the one or more computing devices at the target cloud domain, the authentication information from the intercepted packet;
validating, by the one or more computing devices at the target cloud domain, the intercepted packet based on the authentication information; and
allowing or rejecting, by the one or more computing devices at the target cloud domain, the packet to proceed to a destination responsive to a determination whether the source cloud domain is trusted.
2 . The method of claim 1 , further comprising implementing an identity-based policy by associating an identifier of the entity or the source cloud domain with the authentication information to identify the source of the packet.
3 . The method of claim 2 , further comprising enforcing the identity-based policy on a transfer of data packets from server to server within a cloud platform.
4 . The method of claim 1 , further comprising implementing the authentication information as an explicit token.
5 . The method of claim 4 , further comprising implementing the authentication information as a Transport Layer Security (TLS) session tunnel for the packet.
6 . The method of claim 5 , further comprising using, by the one or more computing devices, an Open Systems Interconnection (OSI) layer 7 tunnel to set up the TLS session tunnel and placing the authentication information in a Server Name Indication (SNI) header of the packet.
7 . The method of claim 6 , further comprising:
parsing, by the one or more computing devices, the SNI header to determine if the SNI header contains an identifier of a trusted entity, cloud domain or server; and
responsive to the SNI header containing the identifier, decapsulating the SNI header from the packet, by the one or more computing devices, and forwarding an inner packet to a destination service.
8 . The method of claim 4 , further comprising: implementing the authentication information by encapsulating the packet with a User Datagram Protocol (UDP) header and a JSON Web Token (JWT).
9 . The method of claim 8 , further comprising inserting, by the one or more computing devices, the JWT into a UDP tunnel packet at a layer 3 network level.
10 . The method of claim 9 , further comprising validating the JWT, by the one or more computing devices, to determine if the sender is trusted; and
responsive to the JWT being validated, stripping the UDP header and forwarding the packet to a destination service.
11 . A non-transitory machine-readable storage medium that provides instructions that, if executed by a processor, are configurable to cause said processor to perform operations comprising:
intercepting, by one or more computing devices at a target cloud domain of an entity, a packet from a source cloud domain received from a public network, wherein the packet includes an implicit certificate having authentication information indicating the source cloud domain of the packet, the authentication information having been added to the packet by egress logic associated with the source cloud domain;
determining, by the one or more computing devices at the target cloud domain, whether the source cloud domain resides within the entity;
in response to determining that the source cloud domain resides within the entity, automatically trusting the packet and forwarding the packet to a destination; and
in response to determining that the source cloud domain resides outside the entity:
extracting, by the one or more computing devices at the target cloud domain, the authentication information from the intercepted packet;
validating, by the one or more computing devices at the target cloud domain, the intercepted packet based on the authentication information; and
allowing or rejecting, by the one or more computing devices at the target cloud domain, the packet to proceed to a destination responsive to a determination whether the source cloud domain is trusted.
12 . The non-transitory machine-readable storage medium of claim 11 , further comprising implementing an identity-based policy by associating an identifier of the entity or the source cloud domain with the authentication information to identify the source of the packet.
13 . The non-transitory machine-readable storage medium of claim 12 , further comprising enforcing the identity-based policy on a transfer of data packets from server to server within a cloud platform.
14 . The non-transitory machine-readable storage medium of claim 11 , further comprising implementing the authentication information as an explicit token.
15 . The non-transitory machine-readable storage medium of claim 14 , further comprising implementing the authentication information as a Transport Layer Security (TLS) session tunnel for the packet.
16 . The non-transitory machine-readable storage medium of claim 15 , further comprising using, by the one or more computing devices, an Open Systems Interconnection (OSI) layer 7 tunnel to set up the TLS session tunnel and placing the authentication information in a Server Name Indication (SNI) header of the packet.
17 . The non-transitory machine-readable storage medium of claim 16 , further comprising:
parsing, by the one or more computing devices, the SNI header to determine if the SNI header contains an identifier of a trusted entity, cloud domain or server; and
responsive to the SNI header containing the identifier, decapsulating the SNI header from the packet, by the one or more computing devices, and forwarding an inner packet to a destination service.
18 . The non-transitory machine-readable storage medium of claim 14 , further comprising: implementing the authentication information by encapsulating the packet with a User Datagram Protocol (UDP) header and a JSON Web Token (JWT).
19 . The non-transitory machine-readable storage medium of claim 18 , further comprising inserting, by the one or more computing devices, the JWT into a UDP tunnel packet at a layer 3 network level.
20 . The non-transitory machine-readable storage medium of claim 19 , further comprising validating the token, by the one or more computing devices, to determine if the sender is trusted; and
responsive to the token being validated, stripping the UDP header and forwarding the packet to a destination service.
21 . An apparatus comprising:
a processor,
a non-transitory machine-readable storage medium that provides instructions that, if executed by the processor, are configurable to cause the apparatus to perform operations comprising,
intercepting, by one or more computing devices at a target cloud domain of an entity, a packet from a source cloud domain received from a public network, wherein the packet includes an implicit certificate having authentication information indicating the source cloud domain of the packet, the authentication information having been added to the packet by egress logic associated with the source cloud domain;
determining, by the one or more computing device at the target cloud domain, whether the source cloud domain resides within the entity;
in response to determining that the source cloud domain resides within the entity, automatically trusting the packet and forwarding the packet to a destination; and
in response to determining that the source cloud domain resides outside the entity:
extracting, by the one or more computing devices at the target cloud domain, the authentication information from the intercepted packet;
validating, by the one or more computing devices at the target cloud domain, the intercepted packet based on the authentication information; and
allowing or rejecting, by the one or more computing devices at the target cloud domain, the packet to proceed to a destination responsive to a determination whether the source cloud domain is trusted.