Cross-NAT network segment ceph rbd block storage single port access method and system

The invention provides a cross-NAT (Network Address Translation) network segment ceph rbd block storage single port access method and a cross-NAT network segment ceph rbd block storage single port access system, comprising a cross-NAT network segment ceph rbd block storage single port access method, comprising: accessing an internal local area network through the Internet according to a command request; network addresses of the Internet and the internal local area network are converted and matched, and then a ceph service is accessed; and accessing the vdisk through mapping of one port and a plurality of osd process port numbers. According to the invention, the rbd proxy is utilized, and the ceph rbd block storage single port access across the NAT network segment is realized. Only an rbd proxy needs to be configured to realize a ceph rbd block storage single port of a cross-NAT network segment, so that the abuse of a public network port is reduced, the resource waste is avoided, the complexity of design and implementation of application software for accessing storage is reduced, and the fault rate of storage reading and writing is reduced.