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D a t a D i r e c t N e t w o r k s S 2 A 9 5 5 0 U s e r G u i d e
M a n a g i n g t h e S 2 A 9 5 5 0
3.6 Remote Login Management
The TELNET=ENABLE|DISABLE command allows the administrator to temporarily enable and
disable the establishment of a remote Telnet session. Use the TELNET command to display the
current setting.
NOTE : The Telnet capability is reset to ON after S2A9550 restart. To turn off Telnet access permanently,
use the NETWORK command.
The TELNET STATS command allows the administrator to view various statistics maintained on
remote Telnet sessions
(Figure 3-52)
. These statistics are kept from the point of power-on.
The administrator is strongly advised to perform any commands affecting the system’s configuration
from the CLI UART only (and not from a Telnet session), and to only perform such commands after
issuing the
TELNET DISABLE command, so that remote users cannot log into the system in the
middle of an administrative command.
3.6.1 When a Telnet Session is Active
Whenever a remote Telnet session is active, the current RS-232 console switches to a CLI sub-shell
which allows the administrator to enter a very limited sub-set of the CLI commands. The following
message is displayed on the console when a Telnet session is initiated from a remote site
(Figure 3-53)
.
Within the CLI sub-shell, the
TELNET
command allows the administrator to view information
regarding the currently active Telnet session
(Figure 3-54)
.
Figure 3-52 Telnet Statistics
S2A [1]: telnet stats
Telnet Session Statistics (since Power-On):
===========================================
Telnet Power-On : Time: 21:43:53 Date: 03/27/2005
Current System : Time: 19:37:00 Date: 03/29/2005
Sessions have been: -- ENABLED --
since : Time: 21:43:53 Date: 03/29/2005
Number of times Telnet Sessions have been:
Enabled : 1
Disabled : 0
Killed : 0
Total Telnet attempts : 2
Total SUCCESSFUL Telnet Sessions : 2
Consecutive UNsuccessful Telnet attempts : 0
Breakdown of UNsuccessful Attempts:
Total UNsuccessful Telnet attempts : 0
-----------------------------------
Telnet session was already active : 0
Telnet sessions were disabled : 0
User supplied invalid login information : 0
Could not obtain the remote socket address : 0
Other (miscellaneous) : 0
Figure 3-53 Telnet Session Initiated
S2A [1]:
New TELNET Session initiated from IP address: 010:123:139:005
[Remote TELNET session ON] Local SUBshell S2A [1]: