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NOTE:
You can configure other settings for the SSH client to work with the SSH server. For more information, see
the
Security Configuration Guide
.
Logging in through modems
The administrator can use two modems to remotely maintain a switch through its Console port over the
Public Switched Telephone Network (PSTN) when the IP network connection is broken.
This section includes these topics:
• Configuration requirements
• Login procedure
• Modem login authentication modes
• Configuring none authentication for modem login
• Configuring password authentication for modem login
• Configuring scheme authentication for modem login
• Configuring common settings for modem login (optional)
Configuration requirements
By default, no authentication is needed when you log in through modems, and the default user privilege
level is 3.
To use this method, perform necessary configurations at both the device side and administrator side.
The following table shows the configuration requirements of remote login through the console port by
using modem dial-in:
Ob
ect Re
uirement
Administrator side
The PC is correctly connected to the modem.
The modem is connected to a telephone cable that works normally.
The telephone number of the remote modem connected to the Console port of the
remote switch is obtained.
Device side
The Console port is correctly connected to the modem.
Configurations have been configured on the modem.
The modem is connected to a telephone cable that works properly.
Authentication configuration has been completed on the remote switch.
Login procedure
1. Set up a configuration environment as shown in Figure 15: connect the serial port of the PC and
the Console port of the device to a modem respectively.
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