Table of Contents
What port does NFS use?
port 2049
NFS uses port 2049. NFSv3 and NFSv2 use the portmapper service on TCP or UDP port 111. The portmapper service is consulted to get the port numbers for services used with NFSv3 or NFSv2 protocols such as mountd, statd, and nlm.
Why does df command hang?
Re: df command hangs verify your network connections. maybe you have a mounted remote filesystem and the remote machine couldn’t be reached (network problem or remote machine down).
What is Nfsd?
The nfsd is a user-level process, but contains no code to process NFS requests. The nfsd issues a system call that gives the kernel a transport endpoint. Invokes a system call to start in-kernel processing of NFS requests on the transport endpoint.
What RPCBind 111?
What is it? Portmapper, also known as Remote Procedure Call Bind (RPCBind), is a mechanism where Internet address ports can be assigned as a program running on a remote computer to act as if it is running on the local computer. RPCBind runs on port 111 and dates back to 1991.
What is reversal for NFS?
Late Reversals: Late reversal means a reversal message sent to NFS by the Acquiring bank after the cutover of NFS business day. E.g. transaction has happened between 4th January, 2014 after 23:00 hrs.
What does Strace do in Linux?
strace is a diagnostic tool in Linux. It intercepts and records any syscalls made by a command. Additionally, it also records any Linux signal sent to the process. We can then use this information to debug or diagnose a program.
Why is NFS stateless?
NFS is stateless; UDP is used as a transport. If a server fails, the client retries. performance transparency. Caching at the client is used to improve performance….Directory and file access protocol.
| null | no operation but ensure that one can access the server |
|---|---|
| write | write bytes to a file |
| link | create a link to a file |
What is Rpcbind service?
The rpcbind utility is a server that converts RPC program numbers into universal addresses. It must be running on the host to be able to make RPC calls on a server on that machine. When an RPC service is started, it tells rpcbind the address at which it is listening, and the RPC program numbers it is prepared to serve.
What is Rpcinfo?
Description. The rpcinfo command makes an RPC call to an RPC server and reports the status of the server. For instance, this command reports whether the server is ready and waiting or not available. The program parameter can be either a name or a number.
Is rpcbind a vulnerability?
rpcbind could be made to consume resources and crash if it received specially crafted network traffic.
What is this NFSv3 xattr code?
This code is based initially on the GPL’d NFSv3 xattr code from IRIX (thanks, Casey!), as well as the existing Linux NFSv3 ACL code. It is implemented as a side-protocol and should not affect any existing protocol operation.
What is NFSv3 and how does it work?
NFSv3 is a tried and tested method of allowing client servers to access files over a network, in a very similar fashion to how the files would be accessed on a local file system.
What is this NFSv3 extended attribute patchset?
This patchset is the initial posting of an implementation of extended attribute support for the Linux NFSv3 code, and intended as an RFC. This code is based initially on the GPL’d NFSv3 xattr code from IRIX (thanks, Casey!), as well as the existing Linux NFSv3 ACL code.
What is the NFS version used by a dual-protocol volume?
The NFS version used by a dual-protocol volume can be NFSv3 or NFSv4.1. The following considerations apply: Dual protocol does not support the Windows ACLS extended attributes set/get from NFS clients.