IBM Hub/Switch Installation Manual page 170

Chapter 3 System Preparation
Table 3-5 Realms to DCE Cell Mappings Stanza Fields
SubStanza
The Realms to DCE Cell Mappings = { ... } stanza contains one or more substanzas providing
Kerberos Realm to DCE Cell Mappings. The substanza(s) are used to specify the appropriate
mappings.
Realms to DCE Cell Mappings specific rules:
For security reasons, only the HPSS.conf in either the path specified by the HPSS_PATH_ETC
environment variable or /var/hpss/etc may be used. The HPSS.conf file must be owned by root and
cannot be writeable by group or other. NOTE: if HPSS_PATH_ETC refers to an NFS mounted
directory and root is not allowed access as root, the lookup will fail.
Realms to DCE Cell Mappings Example:
; Interface Specification (MUST be dot Notation)
Realms to DCE Cell Mappings = {
; Kerberos Realm = DCE Cell Name
kerberos.realm.name = /.../dce.cell.name
}
3.7.1.5 Network Option Stanza
The Network Options are in the Network Options = { ... } stanza of the HPSS.conf file.
The Network Options stanza allows different options to be specified based on: Source IP address
[ Local Interface Name(s) ] AND Destination IP Address(es). When the Parallel FTP Client, Client
API, or Mover establish connections, they will search the contents of this file for entries matching
Source/Destination IP addresses and use the options specified in the matching entry.
The configuration file entries contain values/flags to be used for applying assorted socket and
network options including: whether to enable/disable TCP Delay (TcpNoDelay), the socket send
sizes (SendSpace) and/or socket receive sizes (RecvSpace), the desired write buffer size
(WriteSize), and RFC1323 support ("Large" Window.)
Which configuration entry to use is determined based on the Local Interface Name and the
Destination IP address "masked" by the NetMask value. The calling application (PFTP Client,
Client API, or Mover) will apply the value of the NetMask specification in the configuration file
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<Realm> = <Cell>
E.g. Kerberos.Realm = /.../my_dce_cell
Contains Kerberos Realms and their associated DCE Cell Names.
September 2002 HPSS Installation Guide
Release 4.5, Revision 2