NFS
NFS, or Network File System, is a protocol that enables file sharing across a network. It allows users to access files and directories on remote systems as if they were on their local machines. NFS is commonly used in Unix and Linux environments for networked file storage.
What is NFS
NFS, or Network File System, is a distributed file system protocol originally developed by Sun Microsystems in 1984. It allows a user on a client computer to access files over a network in a manner similar to how local storage is accessed. This makes it possible for multiple users on multiple machines to share files and directories seamlessly.
The primary advantage of NFS is its ability to provide a centralized storage solution that can be accessed by multiple clients. This is particularly useful in environments where data consistency and ease of access are critical. NFS operates over TCP/IP and uses port 2049 by default.
Over the years, NFS has evolved through several versions, each adding new features and improvements. The protocol is widely used in Unix and Linux environments, but it is also supported on other operating systems. NFS is often employed in enterprise settings for tasks such as home directory storage, shared project directories, and backup solutions.
NFS runs on TCP and UDP port 2049 and is official IANA port.Security risk
If port 2049 is open and the NFS service is running, it could expose sensitive files and directories to unauthorized access. This can lead to data breaches, data corruption, or unauthorized data modification. Proper security measures, such as firewalls and access controls, should be implemented to mitigate these risks.
In our UFW tutorial you can follow instructions how you can configure UFW to close port 2049. Use StackChanges to monitor if the NFS port is closed and stays closed. StackChanges will send an alert if port 2049 is open again.