nfscbd man page on FreeBSD

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NFSCBD(8)		  BSD System Manager's Manual		     NFSCBD(8)

     nfscbd NFSv4 client side callback daemon

     nfscbd [-p port_number] [-P client_principal]

     nfscbd runs on a client using NFSv4 to handle callback requests from the
     NFSv4 server.  If no nfscbd is running, NFSv4 mounts will still work, but
     the server will never issue Open Delegations to the client.

     One callback server and one master server are always started.

     The following options are available:

     -p port_number
	     Specifies what port# the callback server should use.

     -P client_principal
	     Specifies the host based principal name to be used as the target
	     for callbacks over RPCSEC_GSS. For KerberosV, it must be in the
	     client's default keytab file.  This client_principal should be
	     the same one specified by the gssname argument being used by
	     nfsv4 mounts.  If you do not specify this argument, callbacks
	     will still work over AUTH_SYS, which is what many extant servers
	     use even for RPCSEC_GSS mounts, as of 2009.

     For example, “nfscbd -p 7654 -P root” starts the daemon to handle call‐
     backs on port# 7654 and is using the host based principal root@<client-
     host>.<dns-domain> as the callback target.

     nfscbd listens for service requests at the port defined by NFSV4_CBPORT
     in /usr/include/fs/nfs/nfs.h, unless -p has been specified.  For more
     information on what callbacks and Open Delegations do, see Network File
     System (NFS) Version 4 Protocol, RFC3530 .

     The nfscbd utility exits 0 on success or >0 if an error occurred.

     nfsv4(4), mount_nfs(8)

     First introduced with the experimental nfs client for NFSv4 support in

BSD				April 25, 2009				   BSD

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