Lantronix MSS1-T, Reference Manual

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Configuration Protocol Configuration
4 - 3
4.3.1.3 Name Resolution
A TCP/IP host generally has an alphanumeric host name, such as Phred, in addition to its IP
address. For this reason, the MSS supports domain name servers (DNS). A DNS 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 4-6: Configuring a Name Server
A secondary nameserver can also be specified for use when the primary nameserver is
unavailable. See Change Nameserver on page 6-15 for more information.
NOTE: If the MSS cannot resolve a text host name, the numeric address must be entered.
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, enter the Change Domain
command, followed by the desired domain name in quotes
Figure 4-7: Configuring the Default Domain
4.3.1.4 IP Security
IP security allows the system administrator to restrict incoming and outgoing TCP/IP sessions
and access to the serial port. Connections are allowed or denied based upon the source IP address
for incoming connections and the destination IP address for outgoing connections.
IP security information can be added to the IP local host table. To add an entry, specify an IP
address and whether to allow or deny connections. For example, the command below disables
outgoing connections for all addresses between 192.0.1.1 and 192.0.1.254.
Figure 4-8: IP Security Command
Single addresses can also be specified. See Change IPsecurity on page 6-12 for more information.
To view the host table entries, enter the Show IPsecurity command. To remove an entry, use the
Delete IPsecurity
command followed by the IP address that you want to remove.
Local>> CHANGE NAMESERVER 192.0.1.67
Local>> CHANGE DOMAIN “widget.incorp.com”
Local>> CHANGE IPSECURITY 192.0.1.255 DISABLED