User manual

Administrative Tools 9-
5
TELNET Access Port
The TELNET Access Port identifies the specific TCP port
number that the NETServer Plus should listen to for incoming
TELNET sessions. The default is 23, TELNET’s well-known port
number.
The TELNET Access Port number can range from 1 to 65536.
Note that 10000 through 10100 are reserved for an internal filter
used for host device port security. Use the following command:
telnet
<IP name or address>
tcp_port
<number>
Security Note
: Some administrators consider using port 23 for
remote administration a security risk since anybody can get a
login prompt simply by Telnetting to the NETServer Plus. This
allows a potential vandal to seize control of the NETServer.
Changing to a non-standard port adds protection by making a
potential vandal guess which port the NETServer is listening to.
Alternatively, you can disable TELNET administration
altogether by setting this parameter to 0.
Discarding and Renaming Files
There are several
delete
commands you can use to discard
various files in the NETServer.
•
The
delete configuration
command discards all
configuration files, reboots the system and restores system
configuration to factory defaults
•
The
delete file
removes a file from the FLASH file system
•
The
delete filter
command pulls a filter entry from the filter
table and discards it from FLASH memory
The
rename file
command copies files within the FLASH file
system. Use the command:
rename file
<input_file> <output_file>