QuickSpecs

Screend
When the system is operating as an IP router, screend provides flexible per-packet access controls for forwarded packets.
This can be used as part of a comprehensive network security plan. Tru64 UNIX also provides interface access filtering to
reinforce the system security against IP spoofing attacks.
Packetfilter
The Packetfilter software interface allows an application to send and receive packets directly to or from a LAN (Ethernet or
FDDI). The Packetfilter provides flexible filtering of incoming packets, so that many such applications can run
simultaneously.
The Tru64 UNIX Packetfilter supports two filtering models: the CMU/Stanford model supported in ULTRIX, and the BSD
Packet Filter (BPF), which provides more flexible and efficient filtering. BPF was developed by the University of California,
Lawrence Berkeley Laboratory. The packetfilter pseudo-driver can support up to 255 simultaneous open filters (each filter is
usually mapped to one instance of an application program).
Several public domain applications that use the Packetfilter are integrated in Tru64 UNIX, including rarpd, tcpdump, tcpslice,
nfswatch, and nfslogsum.
Simple Network Management Protocol (SNMP)
The SNMP agent allows management of the Internet, FDDI, system resources, and network resources using the SNMP. The
agent is extensible, allowing software developers to add MIBs to the agent and to participate in the SNMP.
The SNMP agent contains full SNMP V2.c agents, fully compatible with V1.0 MIB implementations, for managing Internet
MIB-2 objects, FDDI objects, and Token Ring objects. Support for AgentX is provided in V5.0A.
Dynamic Host Configuration Protocol (DHCP)
Tru64 UNIX includes a complete DHCP server/client solution for centralizing and automating IP address administration using
a graphical interface.
Point-to-Point Connections
The Tru64 UNIX system supports point-to-point connections using Serial Line Internet Protocol (SLIP) and Point-to-Point
Protocol (PPP). The PPP subsystem implements PPP V2.3.1, which supports asynchronous point-to-point connections and
IP. It provides authentication with Password Authentication Protocol (PAP) and Cryptographic Authentication Protocol
(CHAP).
Open Network Computing (ONC)
Tru64 UNIX supports Open Network Computing V4.2, including Network File System V2 and V3, PCNFSd, Lock Manager,
Status Monitor, NFSportmon, Network Information Service (NIS), automount, and user-level RPC.
QuickSpecs
HP Tru64 UNIX Operating System Version V5.1B
Networking
DA - 11939 U.S. QuickSpecs — Version 1 — 4/8/2004 Page 12