This post relates to the issue of being unable to log in to U1960 via PuTTY. Please see below for details.
1. Check the U1900 version and try to log in via the LMT tool.
The SSH2 encryption algorithms are updated in V200R003C20. You can run the config softargu type 509 value 1 command to replace the weak encryption algorithms 3des-cbc, aes128-cbc and des-cbc with aes128-ctr, aes192-ctr and aes256-ctr, respectively.
This may prevent users from logging in to the devices using old-version SSH terminal software. If a login failure occurs on the CLI or an encryption algorithm is not supported, use the appropriate LMT and PuTTY software to log in to the devices. Run the config softargu type 509 value 0 command to restore the support for the original encryption algorithms.
2. Connect the PC to the U1900 via the serial port login.
1. Use a serial cable to connect the PC to the serial port of the main control board on the unified gateway.
2. Start the Windows HyperTerminal or other serial port terminal software on the PC.
3. Create a new connection and set the attributes of the COM port. Table 3 lists the key parameters.
Parameter | Description |
|---|---|
Serial line | The default value is COM1. |
Speed | Indicates the baud rate. Set it to 9600. |
Data bits | Indicates the data bit. Set it to 8. |
Stop bits | Indicates the stop bit. Set it to 1. |
Parity | Indicates the parity check bit. Set it to none. |
Flow control | Indicates flow control. Set it to none. |
4. After the connection has been created, verify that the device information is displayed
5. Enter the user name and password for accessing the View mode. The default user name and password are admin and Change_Me.
3. Reset the SSH key
If you still fail to use SSH to log in to the device with the correct user name and password, log in to the U1900 web management system, choose and click Reset next to the SSH key reset. Then, try the SSH login again. To avoid this problem, click Data Save before the device restarts.
