Is NFS authenticated?

NFS shares are allocated with AUTH_SYS RPC authentication by default. You can also configure them to be shared with Kerberos security. Using AUTH_SYS authentication, the client's UNIX User ID (UID) and Group ID (GID) are passed unauthenticated on the network by the NFS server.

Does NFS have authentication?

NFS V4 normally authenticates clients at the user level rather than at the host level. The two user authentication methods are auth_sys (UNIX authentication) and RPCSEC_GSS (Kerberos).

How does NFS authentication 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.

Does NFS support Kerberos authentication?

There are three different modes that nfs can operate in with Kerberos, which should be specified in the mount/export options: krb5 Use Kerberos for authentication only. krb5i Use Kerberos for authentication, and include a hash with each transaction to ensure integrity.

Is NFS a security risk?

NFS Security Issues

NFS like any other unprotected network protocol is vulnerable to two types of attacks: eavesdropping and impostor attack.

NFS Heat vs NFS Unbound (Cops Logic)

Is NFS data encrypted?

In addition to the standard UNIX authentication system, NFS provides a means to authenticate users and machines in networks on a message-by-message basis. This additional authentication system uses Data Encryption Standard (DES) encryption and public key cryptography.

What is the major disadvantage of NFS?

How is NFS different from SMB authentication?

Summary: NFS versus SMB

NFS better for Unix/Linux, while SMB better for Windows. NFS requires extra tools to support Apple, but SMB does not. NFS runs in Unix/Linux and Windows; SMB needs Samba to do so. NFS file locking is mandatory or advisory, but SMB locking is mandatory.

Does NFS use LDAP?

The NFS Volume Services driver is simply looking at the UID or GID attributes on the LDAP record for a user. These are standard attributes, so as long as they are populated in your environment, the NFS Volume Services driver should be able to work properly.

What is alternative to Kerberos authentication?

LDAP, Kerberos, OAuth2, SAML, and RADIUS are all useful for different authorization and authentication purposes and are often used with SSO. The protocol you choose should reflect your application needs and what existing infrastructure is in place.

Does NFS use TLS?

You can mount a file system so that all NFS traffic is encrypted in transit using Transport Layer Security 1.2 (TLS) with an industry-standard AES-256 cipher. TLS is a set of industry-standard cryptographic protocols used for encrypting information that is exchanged over the network.

How to use Kerberos with NFS?

Does NFS have permissions?

Once the NFS file system is mounted read/write by a remote host, the only protection each shared file has is its permissions. If two users that share the same user ID value mount the same NFS file system, they can modify each others files.

Does NFS support ACLs?

1. NFS. By default, if the file system being exported by an NFS server supports ACLs and the NFS client can read ACLs, ACLs are utilized by the client system. To disable ACLs on NFS shares when configuring the server, include the no_acl option in the /etc/exports file.

Which protocol does NFS use?

All versions of NFS can use Transmission Control Protocol (TCP) running over an IP network, with NFSv4 requiring it. NFSv2 and NFSv3 can use the User Datagram Protocol (UDP) running over an IP network to provide a stateless network connection between the client and server.

What is Kerberos NFS?

Kerberos is a trusted third party authentication service. An NFS server and an NFS user separately prove their identities to a KDC server, which issues them cryptographically signed tickets asserting their successful authentication. Then the server and user can trust each other.

Is NFS a stateless protocol?

The original distributed version of NFS (NFS version 2) used a stateless protocol in which the server didn't keep track of any information about clients or what files they were working on. This has a number of advantages: Scalability.

Is NFS default TCP or UDP?

Since the default is TCP, if the -o udp option is not specified, the NFS-exported file system is accessed via TCP. The advantages of using TCP include the following: Improved connection durability, thus less NFS stale file handles messages.

Does NFS use RPC?

NFS is implemented as a set of RPC calls in which the server services certain types of calls made by the client. The client makes such calls based on the file system operations that are done by the client process. NFS, in this sense, is an RPC application.

Is NFS safer than SMB?

In random read, NFS and SMB fare equally with plain text. However, NFS is better with encryption. In the case of random writing, NFS is better than SMB in both plain text and encryption. If you use rsync for file transfer, NFS is a better choice in plain text and encryption.

Does SMB use authentication?

In workgroup mode, the SMB server is responsible for authenticating users locally when access is requested to shared resources. This authentication process is referred to as local login.

Why NFS is better than SMB?

NFS vs SMB performance

NFS is the better choice for transferring small and medium files over the network (for example, files of about 1 MB and less in size). Performance for both protocols is similar when transferring large files (for example, 500 MB files). NFS is faster than SMB when using encryption.

Is NFS outdated?

It is also known as RFC-1094 and works on the User Datagram Protocol(UDP) which is a stateless network connection. It has a storage of 32-bit with a max storage size of 4.2 GB and the data transfer rate is 8kb and needs to commit after the transfer is done. NFS version 2 is now outdated and of no use as of now.

Is NFS still relevant?

Newer versions of Windows have native support for mounting NFS. Today there are only two versions of the NFS protocol left in use: Version 3, published in 1995, and version 4 in 2000. NFS 3 is still by far the most common version of the protocol and is the only one supported by Windows clients.

When should you not use NFS?

And this is ultimately its critical flaw: NFS is itself a bottleneck. The NFS device inherently sits directly in the data path, and can't scale performance to accommodate the demands of I/O intensive computing or multiple concurrent requests. Any gateway is a bottleneck too, and NFS gateways are no exception.