The Network File System (NFS) is a widely available technology that allows data to be shared between various hosts on a network. NFS also supports the use of Kerberos 5 authentication in addition to DES. Kerberos 5 security is provided under a protocol mechanism called RPCSEC_GSS.
What is NFS used for?
NFS is an Internet Standard, client/server protocol developed in 1984 by Sun Microsystems to support shared, originally stateless, (file) data access to LAN-attached network storage. As such, NFS enables a client to view, store, and update files on a remote computer as if they were locally stored.
How does NFS security work?
Secure NFS System
When using UNIX authentication, an NFS server authenticates a file request by authenticating the computer making the request, but not the user. Therefore, a client user can run su and impersonate the owner of a file.
Is NFS secure over Internet?
NFS itself is not generally considered secure – using the kerberos option as @matt suggests is one option, but your best bet if you have to use NFS is to use a secure VPN and run NFS over that – this way you at least protect the insecure filesystem from the Internet – ofcourse if someone breaches your VPN you’re …
What are the security problems with NFS?
NFS (Network File System) is a widely used and primitive protocol that allows computers to share files over a network. The main problems with NFS are that it relies on the inherently insecure UDP protocol, transactions are not encrypted and hosts and users cannot be easily authenticated.
Is NFS safe?
Everyone in your network can access the same files when they become clients on the same NFS. The mounting process for the file system remains transparent, giving clients an idea of how they can handle the content you manage. The NFS may be more secure, as you won’t have as many removable drives and disks on hand.
Is NFS still used?
NFS’s usefulness as a distributed file system has carried it from the mainframe era right through to the virtualization era, with only a few changes made in that time. The most common NFS in use today, NFSv3, is 18 years old — and it’s still widely used the world over.
Why NFS is not secure?
When restarting a machine after a power failure, all of the stored secret keys are lost, and no process can access secure network services, such as mounting an NFS. Root processes could continue if there were someone to enter the password that decrypts the secret key of the root user.
Which is better SMB or NFS?
Conclusion. As you can see NFS offers a better performance and is unbeatable if the files are medium sized or small. If the files are large enough the timings of both methods get closer to each other. Linux and Mac OS owners should use NFS instead of SMB.
What is difference between NAS and NFS?
NAS is a type of network design. NFS is a type of protocol used to connect to a NAS. Network Attached Storage (NAS) is a device that allows users to access files through a network. … NFS (Network File System) is a protocol that is used to serve and share files on a network.
Can NFS be encrypted?
All versions of NFS now have the ability to authenticate (and optionally encrypt) ordinary file system operations using Kerberos. Under NFSv4 all operations can use Kerberos; under v2 or v3, file locking and mounting still do not use it.
If you need access to NFS across the internet, use a VPN (IPSEC, SSL tunnel, SSH tunnel, even pptp) and BLOCK all direct internet access (other than the secure connection) on the server.
What can I use instead of NFS?
Alternatives to NFS include AFS, DFS and RFS.
- AFS – Andrew File System. AFS is a distributed file system that enables co-operating hosts (clients and servers) to efficiently share file system resources across both local area and wide area networks. …
- DFS – Distributed File System. …
- RFS – Remote File Sharing.