Installation guide

G.9.3.1 ULTRIX Migration Issues
There are no ULTRIX migration issues.
G.9.4 Extensible Simple Network Management Protocol
A new Simple Network Management Protocol (SNMP) architecture is
present in this release. The SNMP daemon, snmpd, is now an extensible
master agent. End-user programmers can develop subagent programs that
communicate with snmpd to implement their management information
bases (MIBs) on DIGITAL UNIX systems.
The base operating system MIB support is implemented in a subagent
program called os_mibs, which is started or stopped automatically with
snmpd.
G.9.4.1 ULTRIX Migration Issues
There are no ULTRIX migration issues.
G.9.5 SNMP MIB Support
This release supports the Host Resources MIB (RFC 1514). The MIB
support daemon must query the system’s devices to retrieve information
required for this MIB. This query occurs when the daemon starts, and
subsequently whenever a relevant SNMP request arrives.
This device querying is the default behavior, and may be configured off. See
snmpd
(8) for more information about configuring the SNMP agent.
G.9.5.1 ULTRIX Migration Issues
There are no ULTRIX migration issues.
G.10 Enhanced Security
This release provides the following new enhanced security features:
• Support for per-user resource limits in user profiles, using setrlimit.
• Nonshadowed passwords are allowed, while using other extended
profile features.
• The system administrator can control whether the ttys database is
updated on logins.
• Wildcard support for ttys has been extended to X displays.
G–18 Migration from ULTRIX Version 4.5 to DIGITAL UNIX Version 4.0B