Example for Using SFTP to Log In to Other Devices (ECC Authentication Mode)

To allow the SFTP client to connect to the SSH server, configure the client and server to generate local key pairs, configure the client to generate an ECC public key, and bind the public key to the client.

Networking Requirements

Based on SSH, SFTP ensures that users log in to a remote device securely to manage and transfer files, enhancing secure file transfer. Because the device can function as an SFTP client, you can log in to a remote SSH server from the device to transfer files securely.

As shown in Figure 1, after the SFTP server function is enabled on the SSH server, the SFTP client can log in to the SSH server in password, ECC, password-ECC, DSA, password-DSA, RSA, password-RSA, SM2, password-SM2, or all authentication mode for file access.

Figure 1 Using SFTP to access another device

Interface1 in this example represents GigabitEthernet0/0/0.



Configuration Roadmap

The configuration roadmap is as follows:

  1. Configure users client001 and client002 on the SSH server to use different authentication modes to log in to the SSH server.

  2. Configure SFTP client002 and the SSH server to generate local key pairs, and bind the ECC public key of the SSH client to client002 to authenticate the client when the client logs in to the server.

  3. Enable the SFTP server function on the SSH server.

  4. Configure the service type and authorized directory for the SSH users.

  5. Use SFTP on client001 and client002 to log in to the SSH server.

Data Preparation

To complete the configuration, you need the following data:

  • Password authentication for client001

  • Client002: ECC authentication (public key: ecckey001)

  • IP address of the SSH server: 10.1.1.2

Procedure

  1. Configure the server to generate a local key pair.

    <HUAWEI> system-view
[~HUAWEI] sysname SSH Server
[*HUAWEI] commit
[~SSH Server] ecc local-key-pair create
Info: The key name will be: SSH Server_Host_ECC
Info: The key modulus can be any one of the following: 256, 384, 521.
Info: Key pair generation will take a short while.
Please input the modulus [default=521]:521
Info: Generating keys...
Info: Succeeded in creating the ECC host keys.

  2. Create SSH users on the server.

    There are several authentication modes for SSH users: password, RSA, password-RSA, DSA, password-DSA, ECC, password-ECC, SM2, password-SM2 and All.

    • If the authentication mode is password, password-ECC, password-DSA, password-sm2 or password-RSA, configure a local user on the server with the same user name.

    • If the authentication mode is RSA, password-RSA, DSA, password-DSA, SM2, password-SM2, ECC, password-ECC, or All, save the RSA, DSA, SM2, or ECC public key generated on the SSH client to the server.

    # Configure VTY user interfaces.

    [*SSH Server] user-interface vty 0 4
[*SSH Server-ui-vty0-4] authentication-mode aaa
[*SSH Server-ui-vty0-4] protocol inbound ssh
[*SSH Server-ui-vty0-4] commit
[~SSH Server-ui-vty0-4] quit

    • Create an SSH user named client001.

      # Create an SSH user named client001 and configure password authentication for the user.

      [~SSH Server] ssh user client001
[*SSH Server] ssh user client001 authentication-type password
[*SSH Server] commit

      # Set a password for client001.

      [~SSH Server] aaa
[*SSH Server-aaa] local-user client001 password
Please configure the password (8-128)
Enter Password:
Confirm Password:

      The password must meet the following requirements:

      • The password is entered in man-machine interaction mode. The system does not display the entered password.

      • A password is a string of 8 to 16 case-sensitive characters and must contain at least two types of the following characters: uppercase letters, lowercase letters, digits, and special characters.

      • Special characters exclude question marks (?) and spaces. However, spaces are allowed in the password if the password is enclosed in quotation marks.
        • Double quotation marks cannot contain double quotation marks if spaces are used in a password.
        • Double quotation marks can contain double quotation marks if no space is used in a password.

        For example, the password "Aa123"45"" is valid, but the password "Aa 123"45"" is invalid.

      The configured password is displayed in ciphertext in the configuration file.

      [*SSH Server-aaa] local-user client001 service-type ssh
[*SSH Server-aaa] local-user client001 level 3
[*SSH Server-aaa] commit
[~SSH Server-aaa] quit

    • Create an SSH user named client002.

      # Create an SSH user named client002 and configure ECC authentication for the user.

      [~SSH Server] ssh user client002
[*SSH Server] ssh user client002 authentication-type ecc
[*SSH Server] ssh authorization-type default root
[*SSH Server] commit

  3. Configure an ECC public key for the server.

    # Configure client002 to generate a local key pair.

    <HUAWEI> system-view
[~HUAWEI] sysname client002
[*HUAWEI] commit
[~client002] ecc local-key-pair create
Info: The key name will be: client002_Host_ECC
Info: The key modulus can be any one of the following: 256, 384, 521.
Info: Key pair generation will take a short while.
Please input the modulus [default=521]:521
Info: Generating keys...
Info: Succeeded in creating the ECC host keys.
[*client002] commit

    # Check the ECC public key generated on the client.

    [~client002] display ecc local-key-pair public
======================Host Key==========================
Time of Key pair created : 2013-01-22 10:33:06
Key Name : client002_Host_ECC
Key Type : ECC Encryption Key
========================================================
Key Code:                                                                                                                           
  04D7635B C047B02E 20C1E6CB E04B5E5C 7DCADD88                                                                                      
  F676AB0E C91ACB3C B0394B18 FA29E5C2 0426F924                                                                                      
  DAD9AA02 C531E5ED C6783FFA 41235A16 8D7723E0                                                                                      
  7E63D68D E7  

Host Public Key for PEM format Code:
---- BEGIN SSH2 PUBLIC KEY ----
AAAAE2VjZHNhLXNoYTItbmlzdHAxOTIAAABBBL+PCqbAEJKKKUpCYdSfyiyY5Iq3
DM9ZB3mjx62wShmmNMiZJAV+02aMJ6CsHBuWCbVLO/Zg8Ng3kGXC4ltmLXM=
---- END SSH2 PUBLIC KEY ----

    # Copy the ECC public key generated on the client to the server.

    [~SSH Server] ecc peer-public-key ecckey001
Enter "ECC public key" view, return system view with "peer-public-key end".
[*SSH Server-ecc-public-key] public-key-code begin
Enter "ECC key code" view, return last view with "public-key-code end".
[*SSH Server-ecc-public-key-ecc-key-code] 04BF8F0A A6C01092 8A294A42 61D49FCA 2C98E48A
[*SSH Server-ecc-public-key-ecc-key-code] B70CCF59 0779A3C7 ADB04A19 A634C899 24057ED3
[*SSH Server-ecc-public-key-ecc-key-code] 668C27A0 AC1C1B96 09B54B3B F660F0D8 379065C2
[*SSH Server-ecc-public-key-ecc-key-code] E25B662D 73
[*SSH Server-ecc-public-key-ecc-key-code] public-key-code end
[*SSH Server-ecc-public-key] peer-public-key end
[*SSH Server] commit

  4. Bind the ECC public key to client002.

    [~SSH Server] ssh user client002 assign ecc-key ecckey001
[*SSH Server] commit

  5. Enable the SFTP server function on the SSH server.

    # Enable the SFTP server function.

    [~SSH Server] interface LoopBack 0
[~SSH Server-LoopBack0] ip address 10.1.1.1 255.255.255.255
[*SSH Server-LoopBack0] quit
[*SSH Server] sftp server enable
[*SSH Server] ssh server-source -i loopback 0
[*SSH Server] commit

  6. Configure the service type and authorized directory for the SSH users.

    Two SSH users are configured on the SSH server: client001 in password authentication mode and client002 in ECC authentication mode.

    [*SSH Server] ssh user client001 service-type sftp
[*SSH Server] ssh user client001 sftp-directory cfcard:
[*SSH Server] ssh user client002 service-type sftp
[*SSH Server] ssh user client002 sftp-directory cfcard:

  7. Connect SFTP clients to the SSH server.

    # If the client logs in to the server for the first time, enable first authentication on the client.

    Enable first authentication on client001.

    <HUAWEI> system-view
[~HUAWEI] sysname client001
[*HUAWEI] commit
[~client001] ssh client first-time enable
[*client001] commit

    Enable first authentication on client002.

    [*client002] ssh client first-time enable
[*client002] commit

    # Connect client001 to the SSH server in password authentication mode.

    [~client001] sftp 10.1.1.1
Trying 10.1.1.1 ...
Press CTRL+K to abort
Connected to 10.1.1.1 ...      
Please input the username:client001
Enter password:

    # Connect client002 to the SSH server in ECC authentication mode.

    [~client002] sftp 10.1.1.1
Trying 10.1.1.1 ...
Press CTRL+K to abort
Connected to 10.1.1.1 ...      
The server is not authenticated. Continue to access it? [Y/N] :y 
Save the server's public key? [Y/N] :y 
The server's public key will be saved with the name 10.1.1.1. Please wait.
Please input the username: client002
Please select public key type for user authentication [R for RSA/E for ECC] Please select [R/E]:e

  8. Verify the configuration.

    # Check the status of the SSH server.

    [~SSH Server] display ssh server status
SSH Version                                : 2.0
SSH authentication timeout (Seconds)       : 60
SSH authentication retries (Times)         : 3
SSH server key generating interval (Hours) : 0
SSH version 1.x compatibility              : Enable
SSH server keepalive                       : Disable
SFTP IPv4 server                           : Enable
SFTP IPv6 server                           : Enable
STELNET IPv4 server                        : Enable
STELNET IPv6 server                        : Enable
SNETCONF IPv4 server                       : Enable
SNETCONF IPv6 server                       : Enable
SNETCONF IPv4 server port(830)             : Disable
SNETCONF IPv6 server port(830)             : Disable
SCP IPv4 server                            : Enable
SCP IPv6 server                            : Enable
SSH IPv4 server port                       : 22
SSH IPv6 server port                       : 22
SSH server source address                  : 10.1.1.1
SSH ipv6 server source address             : 0::0  
SSH ipv6 server source vpnName             : 
ACL name                                   :
ACL number                                 :
ACL6 name                                  : 
ACL6 number                                :
SSH server ip-block                        : Enable

    # Check information about SSH users.

    [~SSH Server] display ssh user-information
----------------------------------------------------
Username                : client001
Authentication-type     : password
User-public-key-name    : 
User-public-key-type    : -
Sftp-directory          : cfcard:
Service-type            : sftp

Username                : client002
Authentication-type     : ecc
User-public-key-name    : ecckey001
User-public-key-type    : ECC
Sftp-directory          : cfcard:
Service-type            : sftp
----------------------------------------------------
Total 2, 2 printed

Configuration Files

  • SSH server configuration file

    #
 sysname SSH Server
#
ecc peer-public-key ecckey001
public-key-code begin
    04BF8F0A A6C01092 8A294A42 61D49FCA 2C98E48A
    B70CCF59 0779A3C7 ADB04A19 A634C899 24057ED3
    668C27A0 AC1C1B96 09B54B3B F660F0D8 379065C2
    E25B662D 73
#
interface loopback 0
 ip address 10.1.1.1 255.255.255.255
sftp server enable
ssh server-source -i loopback 0
ssh user client001
ssh user client001 authentication-type password
ssh user client001 sftp-directory cfcard:
ssh user client001 service-type sftp
ssh user client002
ssh user client002 assign ecc-key ecckey001
ssh user client002 authentication-type ecc
ssh authorization-type default root
ssh user client002 sftp-directory cfcard:
ssh user client002 service-type sftp
#
aaa
 local-user client001 password cipher @%@%UyQs4,KTtSwJo(4QmW#K,LC:@%@%
 local-user client001 level 3
 local-user client001 service-type ssh
 #
interface GigabitEthernet0/0/0
 undo shutdown
 ip address 10.1.1.2 255.255.0.0
#
user-interface vty 0 4
 authentication-mode aaa
 protocol inbound ssh
#
return

  • Client001 configuration file

    #
 sysname client001
#
interface GigabitEthernet0/0/0
 undo shutdown
 ip address 10.1.2.2 255.255.0.0
#
 ssh client first-time enable
#
return

  • Client002 configuration file

    #
 sysname client002
#
interface GigabitEthernet0/0/0
 undo shutdown
ip address 10.1.3.3 255.255.0.0
#
 ssh client first-time enable
#
return
Parent Topic: Configuration Examples for Accessing Other Devices
Copyright © Huawei Technologies Co., Ltd.
Copyright © Huawei Technologies Co., Ltd.
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