Which tool communicates with RPC services and checks misconfigurations on NFS shares?

• A. Showmount
• B. RPCScan
• C. SuperEnum
• D. smtp-user-enum

Answer: (A)

NFS shares are exposed through RPC, so discovering what is available and how it’s exported involves talking to the RPC mount service on the server. Showmount communicates with RPC services to query the NFS mountd and list the exported file systems, including who is allowed to mount them. This makes it the best choice for checking misconfigurations, because its output reveals which directories are exported and the access scope (for example, which hosts or networks are permitted), letting you spot overly permissive or incorrect exports that could pose security risks. Other options either focus on scanning RPC services in general without specifically enumerating NFS exports, or target unrelated protocols and platforms, so they don’t directly handle NFS export misconfigurations.