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Using the MSS Interactive Connections

5-3

The Telnet command can be followed by one or more environment strings. This table shows the most

commonly used strings—see the MSS Reference Manual for the complete list.

These environment strings can be used to make a Telnet connection to a specific port number. For example,

to form a raw Telnet connection to socket 2001, follow the host’s name or numeric IP address with :2001

and the environment string T.

Figure 5-2: Opening a Telnet Connection to a Specific Port

Rlogin

Rlogin allows a user to log into a remote host as if he or she were a local user. In the example below, shark

is the remote host and lola is the username. Unless the username is password protected, the user will be

logged in normally.

Figure 5-3: Connecting with Rlogin

Note:

Because Rlogin can bypass the normal password/login sequence and is therefore a

potential security problem, it may be disabled on some hosts. It is disabled by default on

the MSS.

Session Control

When a user connects to a network service (via Telnet, Rlogin), a session is created. A user can open several

connections to various hosts at once, although only one is displayed on the screen at a time. Each separate

connection is a session. The following section explains commands used to manipulate sessions.

Break Key and Local Switch

The Break key allows users to leave an active session and return to the MSS Local> prompt without

disconnecting sessions. By default, the MSS handles the Break key locally. Users can change whether the

Break key is processed by the MSS (Local), processed by the remote host (Remote), or ignored (None)

using the Change Port [Portlist] Break command.

Figure 5-4: Changing the Break Key

Table 5-1: Commonly Used Environment Strings

R Rlogin protocol (sets port number to 513 if not already set)

T TCP mode (raw uninterpreted data stream)

U UDP mode (the default UDP socket is 4096)

Y Encrypted mode (raw TCP socket that encrypts all data

using a 56-bit key)

nnnn socket number (TCP and UDP only)

Local> TELNET 192.0.1.66:2001T

Local> RLOGIN shark “lola”

Local>> CHANGE PORT 3 BREAK REMOTE

Lantronix MSS4 Installation Guide

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