Techniques for utilising multiple network interfaces for a cloud shell are provided. The techniques include receiving, by a computer system, a command to execute an operation by the computer system, the command being received from a router via a primary virtual network interface card (vNIC). The computer system may execute the operation, generating an output of the operation. The techniques also include transmitting, by the computer system, a message comprising the output of the operation to a shell subnet via a secondary vNIC, the secondary vNIC being configured for unidirectional transmission from the computer system to the shell subnet. The shell subnet may be configured to transmit the output of the operation to an external network via a network gateway.