NETRESTRICT(5)							AFS File Reference						    NETRESTRICT(5)

NAME

       NetRestrict - Defines interfaces not to register with AFS servers

DESCRIPTION

       There are two NetRestrict files, one for an AFS client and one for an AFS File Server or database server.  The AFS client NetRestrict file
       specifies the IP addresses that the client should not register with the File Servers it connects to.  The server NetRestrict file specifies
       what interfaces should not be registered with AFS Database Servers or used to talk to other database servers.

   Client NetRestrict
       The NetRestrict file, if present in a client machine's /etc/openafs directory, defines the IP addresses of the interfaces that the local
       Cache Manager does not register with a File Server when first establishing a connection to it. For an explanation of how the File Server
       uses the registered interfaces, see NetInfo(5).

       As it initializes, the Cache Manager constructs a list of interfaces to register, from the /etc/openafs/NetInfo file if it exists, or from
       the list of interfaces configured with the operating system otherwise.  The Cache Manager then removes from the list any addresses that
       appear in the NetRestrict file, if it exists. The Cache Manager records the resulting list in kernel memory.

       The NetRestrict file is in ASCII format. One IP address appears on each line, in dotted decimal format. The order of the addresses is not
       significant. The value 255 is a wildcard that represents all possible addresses in that field. For example, the value 192.12.105.255
       indicates that the Cache Manager does not register any of the addresses in the 192.12.105 subnet.

       To display the addresses the Cache Manager is currently registering with File Servers, use the fs getclientaddrs command.

   Server NetRestrict
       The NetRestrict file, if present in the /var/lib/openafs/local directory, defines the following:

       o   On a file server machine, the local interfaces that the File Server (fileserver process) does not register in the Volume Location
	   Database (VLDB) at initialization time.

       o   On a database server machine, the local interfaces that the Ubik synchronization library does not use when communicating with the
	   database server processes running on other database server machines.

       As it initializes, the File Server constructs a list of interfaces to register, from the /var/lib/openafs/local/NetInfo file if it exists,
       or from the list of interfaces configured with the operating system otherwise. The File Server then removes from the list any addresses
       that appear in the NetRestrict file, if it exists. The File Server records the resulting list in the /var/lib/openafs/local/sysid file and
       registers the interfaces in the VLDB. The database server processes use a similar procedure when initializing, to determine which
       interfaces to use for communication with the peer processes on other database machines in the cell.

       The NetRestrict file is in ASCII format. One IP address appears on each line, in dotted decimal format. The order of the addresses is not
       significant.

       To display the File Server interface addresses registered in the VLDB, use the vos listaddrs command.

SEE ALSO

       NetInfo(5), sysid(5), vldb.DB0(5), fileserver(8), fs_getclientaddrs(1) vos_listaddrs(1)

COPYRIGHT

       IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.

       This documentation is covered by the IBM Public License Version 1.0.  It was converted from HTML to POD by software written by Chas
       Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.

OpenAFS 							    2012-03-26							    NETRESTRICT(5)