Configuration
TCP/IP Configuration
4-3
The MSS can be told which hosts are the gateways for the local network. If no gateway is specified, the
MSS will listen to network broadcasts to decide which hosts are acting as gateways. The command below
tells the MSS which host is the preferred gateway.
Figure 4-3:
Specifying a Gateway
Note:
A secondary gateway can also be configured in case the primary gateway is unavailable.
If you do not wish to use a preferred gateway, specify 0.0.0.0 as the IP address in the above command. See
Change Server Gateway in the MSS Reference Manual for more information.
Name Server
A TCP/IP host generally has an alphanumeric host name, such as Phred, in addition to its IP address. The
alphanumeric host name is usually more descriptive or easier to remember. For this reason, the MSS
supports domain name system servers (DNS). A DNS server is a host that can translate text host names into
the numeric addresses needed to make a connection. To specify a domain name server, use the following
command:
Figure 4-4:
Configuring a Nameserver
A secondary nameserver can also be specified for use when the primary nameserver is unavailable. See
Change Server Nameserver in the MSS Reference Manual for more information.
Note:
If the
MSS
cannot resolve a text host name, use the numeric IP address.
The MSS also allows you to set a default domain name to be appended to any host name for the purpose of
name resolution. When a user types a host name, the MSS will add this domain name and attempt the
connection. Name checking applies to any MSS commands that require text name resolution, such as
Telnet, Rlogin, and Ping. To set the default domain, enter the Change Server Domain command followed
by the desired domain name in quotes
Figure 4-5:
Configuring the Default Domain
Note:
Some nameservers will not resolve host names that do not have a domain at the end.
IP Security
The IP Security feature allows the system administrator to restrict incoming and outgoing TCP/IP sessions
and access to the serial ports. Every time a connection is requested, the MSS will check the IP local host
table to determine whether or not that connection should be allowed. Connections are allowed or denied
based upon the source IP address (for incoming connections) or the destination IP address (for outgoing
connections).
The IP local host table stores a list of allowed (Enabled) and denied (Disabled) IP addresses in either the
form of individual addresses (e.g. 192.71.2.88) or wildcards, with a 255 in one or more of the trailing
segments (e.g. 192.255.255.255). Wildcard addresses match all addresses in that range. To add an entry,
specify an IP address and whether to allow or deny connections.
Local>> CHANGE SERVER GATEWAY 192.0.1.173
Local>> CHANGE SERVER NAMESERVER 192.0.1.167
Local>> CHANGE SERVER DOMAIN “xyzcorp.com”
