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64 CHAPTER 4: TERMINAL SERVICE
Table 46 Establish Telnet Server or Telnet Client connection
By default, Telnet Server starts automatically. The default value of service-port is
23.
To terminate Telnet service, enter Ctrl+] at Telnet Client side.
Setup Reverse Telnet Connection
Please use async mode flow and undo modem commands in asynchronous
interface view, use
telnet and terminal telnet refuse-negotiation
commands in system view, use
reverse-telnet disconnect, reverse-telnet
timeout
, reverse-telnet listenport and reverse-telnet return-deal
commands in interface view.
Table 47 Enable Reverse Telnet connection
By default, the option for negotiation towards the Telnet client is enabled, and
Reverse Telnet will expire in 600 seconds. Reverse Telnet transparently transmits all
data. The interface use the default listen port number.
Reverse Telnet timeout ensures that if no data is transmitted during a specified
time, the established Reverse Telnet will disconnect automatically. By default, no
timeout is configured for the Reverse Telnet, that is, as long as the Reverse Telnet is
connected, even if there is no data being transmitted, the Reverse Telnet will not
be disconnected.
The Reverse Telnet can be disconnected in interface view.
The undo modem command must be used to disable modem calling-in and
calling-out before the Reverse Telnet timeout of the configuration interface is
configured.
On the 3Com Router series, the maximum number of Reverse Telnet connections
is related to the interface card and the maximum number of tasks supported by
the router.
Operation Command
Enable the Telnet Client connection service telnet host-ip-address [
service-port ]
Operation Command
Forbid the modem to dial in or dial out undo modem
Set the router to flow mode async mode flow
Log onto the router at specified port and
connect to corresponding async port
telnet host-ip-address
service-port
Disable/Enable the option negotiation towards
the Telnet client
terminal telnet
refuse-negotiation
Configure the timeout of Reverse Telnet terminal telnet timeout
Configure the Reverse Telnet timeout of the
interface
reverse-telnet timeout time
Disconnect the Reverse Telnet of the interface reverse-telnet disconnect
Do not send the carriage return received from
the telnet end to the terminal
reverse-telnet return-deal
from-telnet
Do not send the carriage return received from
the terminal to the telnet end
reverse-telnet return-deal
from-dumb