Please refer to the whitepaper "Building Secure SANs": [URL]  Wide Name (nWWN) regardless of the physical port on the switch to which it is connected. Soft zoning does not perform any filtering of frames among zones; it merely restricts routing information from being passed to unauthorized zone members. One significant advantage of soft zoning is its flexibility and ease of management. For example, with soft zoning if a node must be physically moved and plugged in to a new port, its zone membership stays intact. A significant security disadvantage is that a malicious node could spoof any given nWWN on the fabric and access data located on a LUN to which it normally would not have access.  Hard zoning, using physical switch ports for zone membership, is a more secure zoning method. Not only is routing information not passed to unauthorized zone members, but frames are filtered to ensure only authorized zone members can communicate. WWN spoofing and route-based attacks would be defended. Hard zoning security benefits come at the cost of SAN management.
Hi, I am totally confused with the difference between hard zoning and soft zoning, can someone explain?   Thanks
Hard & Soft Zoning