Technical data

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TELNET Remote Access
TELNET access to the router is supported. TELNET allows you to log in to the router as if you are directly
connected through the Console port. In this manner you can issue commands, using the command line interface, to
configure the router and perform status monitoring from any remote location. You can use one of the available
TCP/IP packages containing the TELNET application. To access the router using TELNET, issue the appropriate
command syntax and assign the IP address of the router. You are then directly connected to the router and can
issue commands. When you wish to end the TELNET session, exit the application by entering ‘logoff’ or another
appropriate command.
A system security timer will log off a Telnet session after 10 minutes of inactivity. For more information, refer to
the
system securitytimer
command, page 133
.
Use the command
system telnetport
to enable or disable TELNET access.
Client TFTP Facility
A client Trivial File Transfer Protocol (TFTP) facility is built into the router and is capable of reading from and
writing to the network. A TFTP server must be properly configured to communicate with the router for file
transfers to be successful. The client TFTP facility is employed to boot software from a TFTP server, perform
software upgrades and copy configuration files to a TFTP server. A TFTP server is integrated into the Windows’
Configuration Manager and can also be used as a standalone application.
TFTP Server
The TFTPD (Trivial File Transfer Protocol Daemon) program is installed on your PC as part of the DSL Tools
software. TFTPD waits for incoming TFTP requests from TFTP clients. It will put or get a file to or from your
computer’s hard disk.
There is no security built into TFTPD, so it is important to specify a root directory where all the files that may be
accessed are located. When a file is requested, it must be at or below this root directory on your directory tree or
the request will be denied. If a TFTP client wants to put a file on your PC, then the file must already exist for
writing.
The
Options
menu of the TFTPD program allows the user to configure additional parameters such as the number
of retries and the time between retries. The root directory can also be specified from the
Options
menu.
The DOS command line usage for TFTPD is:
TFTPD rootdirectory
The TFTPD operational parameters are kept in the file ROUTER.INI in the form:
rootdir=rootdirectory
retries=maxtries
timeout=timeout
TFTPD is automatically called by BOOTP and Configuration Manager.