Communication system, communication method, and non-transitory storage medium storing program

A communication system including: a cloud facility and a capture server, wherein the capture serve receives session identification information from the cloud facility that receives a session generation request from the communication facility. If a capture function is enabled for the SIM associated with the session identification information, the capture server starts a capture process for capturing a packet whose session identification information included in a header matches session identification information associated with the SIM whose capture function has been enabled, among packets received by mirroring of data transmitted toward the cloud facility, and the cloud facility transmits a response to the session generation request to the communication facility connected to the cloud facility, after the capture process is started.