What ports does NFS use?
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.
How does portmapper work?
The portmapper maps RPC services to the ports they are listening on. RPC processes notify portmap when they start, registering the ports they are listening on and the RPC program numbers they expect to serve. The client system then contacts portmap on the server with a particular RPC program number.
What is portmap in perspective of NFS?
The portmap daemon helps clients map program number and version number pairs to the port number of a server. Each RPC application has associated with it a program number and a version number. The portmap daemon runs on the same system as the NFS application.
What port does mountd use?
portmapper: 111 (default on all linux distributions) nfs service: 2049 (default on all linux distributions) mountd: 20048 (depends on the linux distribution)
What port is portmapper?
port 111/
Portmapper maps Remote Procedure Call (RPC) program and version numbers to transport-specific port numbers (TCP/UDP port numbers). The Portmapper service makes dynamic binding of remote programs possible. Portmapper listens on port 111/TCP and port 111/UDP.
What port does portmapper normally use to communication with RPC client?
The port mapper service always uses TCP or UDP port 111; a fixed port is required for it, as a client would not be able to get the port number for the port mapper service from the port mapper itself. The port mapper must be started before any other RPC servers are started.
What is portmap protocol?
A port mapper is the protocol that maps the number or version of an Open Network Computing Remote Procedure Call (ONC RPC) program to a port used for networking by that version of the program.
What is portmap in Linux?
Portmap is a server that converts RPC program numbers into DARPA protocol port numbers. It must be running in order to make RPC calls. When an RPC server is started, it will tell portmap what port number it is listening to, and what RPC program numbers it is prepared to serve.
What network ports does RPC Statd use?
statd running from a netstat -tunap command, on several ports (TCP:59061, UDP:40594, UDP:919) on my Debian server.
What is the default port number for statd?
By default, rpc.statd will ask portmap (8) to assign it a port number. As of this writing, there is not a standard port number that portmap always or usually assigns. Specifying a port may be useful when implementing a firewall. specify a directory in which to place statd state information.
How do I assign a standard port number to portmap?
By default, rpc.statd will ask portmap (8) to assign it a port number. As of this writing, there is not a standard port number that portmap always or usually assigns. Specifying a port may be useful when implementing a firewall. specify a port for rpc.statd to listen on. By default, rpc.statd will ask portmap (8) to assign it a port number.
How do I find a port on a shipping map?
Click on the port icons for a thumbnail view of the port. Use the Port Index link on the left side menu to view an alphabetical list of the ports in United States. To view just those ports with container liner service, follow the Shipping – by Map menu links.
How do I view the status of RPC services using portmap?
Because portmap provides coordination between RPC services and the port numbers used to communicate with them, it is useful to view the status of current RPC services using portmap when troubleshooting. The rpcinfo command shows each RPC-based service with port numbers, an RPC program number, a version number, and an IP protocol type (TCP or UDP).