SCO OpenServer provides a wide variety of network protocols and
networking technologies. Existing protocols have been
enhanced to conform to the latest standards (RFSs),
improve performance, increase the number of
concurrent connections, and provide higher network
bandwidth and data transfer rates.
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There are some changes in the Network Configuration Manager /
netconfig(ADM)
utility, including:
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you can now configure a failover device for the primary network
card, allowing networking traffic to be
shifted to another configured network adapter when hardware
failures are detected on the primary card.
See
``Configuring a backup network card''
for more details.
NOTE:
Currently, you cannot use the
Network Configuration Manager
to switch manually between primary and backup devices.
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the Loopback interface isn't displayed anymore, but
the Loopback configuration still exists.
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the Add New WAN Connection option
on the Hardware menu has been removed.
You can no longer configure
PPP or SLIP connections using
netconfig(ADM).
See
``Configuring network connections''
for more information on using the
Network Configuration Manager.
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A new, high-performance TCP/IP stack is provided,
offering better throughput and less CPU-overhead.
See the
``Administering TCP/IP''
topic for more information.
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The latest versions of services such as
Dynamic Host Configuration Protocol (DHCP),
Address Allocation Services, connection server
call filtering, and automatic detection of an
incoming PPP connection are included.
Documentation for these services is available from the
Networking
category in the online documentation.
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A new SCOadmin FTP Server Manager,
that allows you to perform common configuration and
administration tasks in an easy-to-use graphical
environment, is provided. See
``Configuring File Transfer Protocol (FTP) servers''
in the online documentation
for more information.
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SCO OpenServer Release 6.0.0 provides distributed filesystem capabilities
via NFS®. This release is based on NFS version 3.0,
which adds support for large files. Support for PCNFS clients
is built in, allowing file sharing with other systems
and PC clients running PCNFS. NFS can be configured into
the system as a Dynamically Loadable Kernel Module (DLKM)
that can be loaded and unloaded during runtime.
NFS documentation and manual pages are available from the
Networking
category in the online documentation.
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The Internet Protocol Security (IPsec) protocol suite and
associated tools provide the ability to encrypt and authenticate
IP packets transmitted between cooperating hosts or subnets.
One of the uses of IPsec is to implement a
Virtual Private Network (VPN). In a VPN, a non-secure
communication path (such as an Internet connection) is
used for the transmission of encrypted and authenticated
packets between hosts that have been set up to use
that path and only provide IPsec packets over the path.
For more information, see
``Setting up and using Secure IP (IPsec)''
in the online documentation's
Networking
category.
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IP packet filtering functionality is provided by a new version
of ipfilter. This new implementation of IP Filter
provides complete and flexible firewall capabilities. It
includes support for Network Address Translation (NAT),
including port translation.
See the
``Configuring IP filtering (firewall)''
topic in the online documentation's
Networking
category.
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Additional security features are provided using open source
Secure Shell (OpenSSH version 4.0) utilities and
the Secure Sockets Layer (SSL version 0.9.7) protocol,
built into the Mozilla web browser and the Apache web server.
These protocols allow for logging into and executing
commands on a remote computer. They provide secure,
encrypted communications between two untrusted hosts
over an insecure network.
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The Simple Network Management Protocol (SNMP) package
included with the system provides both agent and management
station capabilities. The new SCO OpenServer Release 6.0.0 server
can be managed by an SNMP Enterprise Management system
and can also serve to monitor other nodes within the
network.
See
``Configuring the Simple Network Management Protocol (SNMP)''
for more information.
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PPP is provided by SCO PPP from Morning Star. See
``Internet and Intranet''
for details.