Guidelines

What is portmap rpcbind?

What is portmap rpcbind?

portmap or just portmap, or rpcbind) is an Open Network Computing Remote Procedure Call (ONC RPC) service that runs on network nodes that provide other ONC RPC services. Version 2 of the port mapper protocol maps ONC RPC program number/version number pairs to the network port number for that version of that program.

What is rpcbind in NFS?

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.

Can I disable rpcbind?

do you need anything which depends on rpcbind? But you can safely switch it off, that will not cause any danger.

What is NFS portmap?

NFS and portmap NFS relies upon remote procedure calls (RPC) to function. portmap is required to map RPC requests to the correct services. RPC processes notify portmap when they start, revealing the port number they are monitoring and the RPC program numbers they expect to serve.

Is rpcbind needed for NFS client?

1 Answer. IOW – The rpcbind service is needed by nfs clients that use v2 and v3, as it required for file locking, and can be disabled for nfs v4 clients, as locking is a part of the NFSv4.

Is rpcbind needed for NFS?

What is rpcbind protocol?

rpcbind maps RPC program and version numbers to universal addresses, thus making dynamic binding of remote programs possible. rpcbind is bound to a well-known address of each supported transport, and other programs register their dynamically allocated transport addresses with it.

How do I disable Portmapper in Linux?

Linux OS service ‘portmap’

  1. Service Name.
  2. Service Control.
  3. # chkconfig –list portmap portmap 0:off 1:off 2:on 3:on 4:on 5:on 6:off.
  4. # service portmap Usage: /etc/init.d/portmap {start|stop|status|restart|reload|condrestart}
  5. # service portmap start Starting portmap: [ OK ]
  6. # service portmap stop Stopping portmap: [ OK ]

What Rpcbind 111?

“Portmapper is an RPC service, which always listens on tcp and udp 111, and is used to map other RPC services (such as nfs, nlockmgr, quotad, mountd, etc.) to their corresponding port number on the server. …

What are the main features of NFS and NFS daemons?

NFS Daemons

  • lockd. This daemon supports record-locking operations on NFS files.
  • mountd. This is a remote procedure call (RPC) server that handles file-system mount requests from remote systems and provides access control.
  • nfsd. This daemon handles other client file-system requests.

How do I enable rpcbind?

How to Warm-Start rpcbind

  1. Become superuser or assume an equivalent role. Roles contain authorizations and privileged commands.
  2. Determine the PID for rpcbind . Run ps to get the PID, which is the value in the second column.
  3. Send a SIGTERM signal to the rpcbind process.
  4. Restart rpcbind .

How does portmap work with the RPC process?

RPC processes notify portmap when they start, revealing the port number they are monitoring and the RPC program numbers they expect to serve. The client system then contacts portmap service on the server with a particular RPC program number. portmap then redirects the client to the proper port number to communicate with its intended service.

How does the portmap service work in Linux?

Portmap service maps RPC requests to the correct services. RPC processes notify portmap when they start, revealing the port number they are monitoring and the RPC program numbers they expect to serve. The client system then contacts portmap service on the server with a particular RPC program number.

How do I install portmap on RHEL 6?

When you try to install portmap on RHEL 6, it will install rpcbind instead : [root@rhel6 ~]# yum install portmap -y Loaded plugins: rhnplugin This system is not registered with RHN. RHN support will be disabled.

Is the portmap unrecognized service on CentOS 6?

Portmap is replaced by rpcbind on some linux distributions such as Fedora 8,RHEL 6 and CentOS 6. Portmap is now started and stopped as part of the rpcbind service.