How to Telnet and SSH to the Nodegrid Serial Ports

            Note: by default, Telnet access is turned off with your Nodegrid Serial Console. Authorized users can use Telnet or SSH to connect directly to the console of a managed device if all of the following are true:

            • Telnet / SSH protocol is enabled under Security
            • Telnet / SSH protocol is configured for the port
            • Telnet / SSH client available and enabled on the computer from which you are opening a connection

            To connect successfully to the Nodegrid Serial Console's serial port, you need:

            • the hostname (i.e, SFO-DC7-R33-NSCT96) or IP address (i.e, 110.0.0.200) of the Nodegrid Serial Console.
            • a username configured to access the managed device serial port (or none, if authentication on the serial port is skipped)
            • either the Device Name (i.e., SFO-DC7-R33-P3), Port name (i.e., ttyS3), TCP Port (i.e., 7003) or IP port alias (i.e., 110.0.0.10).

             

            How to Telnet to a device through a serial port 

            A - To use a Telnet client, such as Putty, type the above information into client.

            1)  Connection Type: Telnet

                 Host Name (or IP Address): [Hostname | IP Address]

                 Port: [TCP_Port_Alias] 

                 loginusername

             

            2)  Connection Type: Telnet

                 Host Name (or IP Address): [Hostname | IP Address]

                 Port: 23

                 loginusername:TCP_Port_Alias    - OR -

                 loginusername:port_name          - OR -

                 loginusername:device_name

             

            3)  Connection Type: Telnet

                 Host Name (or IP Address): [Hostname | IP Address]

                 Port: 23 

                 loginusername

                 [user@NSC-hostname /]# cd /access/<device_name> 

                 [user@NSC-hostname /]# connect

             

             

            Examples:

            1)  Connection Type: Telnet

                 Host Name (or IP Address): SFO-DC7-R33-NSCT96

                 Port: 7003

                 login: john

             

            2)  Connection Type: Telnet

                 Host Name (or IP Address): SFO-DC7-R33-NSCT96

                 Port: 23

                 login: john:7003

                 login: john:ttyS3

                 login: john:SFO-DC7-R33-P3 

             

            3)  Connection Type: Telnet

                 Host Name (or IP Address): 110.0.0.200

                 Port: 23

                 loginjohn

                 [user@NSC-hostname /]# cd /access/SFO-DC7-R33-P3

                 [user@NSC-hostname /]# connect

             

            B - To Telnet from a shell, type any of the following commands:

            1) # telnet [hostname IP_address]

                 login:username:[device_name | port_name | TCP_Port_Alias]

            2) # telnet [hostname | IP_addressTCP_Port_Alias

                login:username

            3) # telnet IP_Port_Alias

                login:username

            4) # telnet [hostname IP_address]

                login: username

                [user@NSC-hostname /]# cd /access/<device_name>

                [user@NSC-hostname /]# connect

             

            Examples:

            1) # telnet 110.0.0.200

                login: john:SFO-DC7-R33-P3  -OR-  login: john:ttyS3 -OR-  login: john:7003

            2) # telnet SFO-DC7-R33-NSCT96 7003

                login: john

            3) # telnet 110.0.0.10

                login: john

            4) # telnet 110.0.0.200

                login: john

                [user@NSC-hostname /]# cd /access/SFO-DC7-R33-P3 

                [user@NSC-hostname /]# connect

             

            How to close your Telnet session

            Type the Telnet hotkey for your client. The default hotkey for telnet from shell is CTRL ] + q to quit, or in the telnet session enter ^Ec. and then type exit at the CLI prompt.

            Note: for the CLI text session hotkey – press and hold CTRL key plus E key; release them; then hit C and then . (dot)

             

            How to SSH to a device through a serial port 

            A - To use an SSH client, such as Putty, type the above information into client.

            1)  Connection Type: SSH

                 Host Name (or IP Address): [Hostname | IP Address]

                 Port: 22

                 loginusername:TCP_Port_Alias    - OR -

                 loginusername:port_name          - OR -

                 loginusername:device_name

             

            2)  Connection Type: SSH

                 Port: 22

                 Host Name (or IP Address): [username:TCP_Port_Alias@Hostname | IP Address]  - OR -

                 Host Name (or IP Address): [username:port_name@Hostname | IP Address]      - OR -

                 Host Name (or IP Address): [username:device_name@Hostname | IP Address]

             

            3)  Connection Type: SSH

                 Host Name (or IP Address): [Hostname | IP Address]

                 Port: 22

                 loginusername

                 [user@NSC-hostname /]# cd /access/<device_name> 

                 [user@NSC-hostname /]# connect

             

            Examples:

            1)  Connection Type: SSH

                 Host Name (or IP Address): SFO-DC7-R33-NSCT96

                 Port: 22

                 login: john:7003

                 login: john:ttyS3

                 login: john:SFO-DC7-R33-P3

             

            2)  Connection Type: SSH

                 Port: 22

                 Host Name (or IP Address): john:7003@110.0.0.200             - OR -

                 Host Name (or IP Address): john:ttyS3@110.0.0.200             - OR -

                 Host Name (or IP Address): john:SFO-DC7-R33-P3@110.0.0.200 

             

            3)  Connection Type: SSH

                 Host Name (or IP Address): 110.0.0.200

                 Port: 22

                 loginjohn

                 [user@NSC-hostname /]# cd /access/SFO-DC7-R33-P3

                 [user@NSC-hostname /]# connect

             

            B - To use SSH from a shell, type any of the following commands:

            1) # ssh –l username:port_name [hostname | IP_address]

            2) # ssh –l username:device_name [hostname | IP_address]

            3) # ssh –l username:TCP_Port_Alias [hostname | IP_address]

            4) # ssh –l username IP_Port_Alias

            5) # ssh –l username [hostname | IP_address]

                [user@NSC-hostname /]# cd /access/<device_name> 

                [user@NSC-hostname /]# connect

             

            Examples:

            1) # ssh –l john:SFO-DC7-R33-P3 SFO-DC7-R33-NSCT96

            2) # ssh –l john:ttyS3 110.0.0.200

            3) # ssh –l john:7003 SFO-DC7-R33-NSCT96

            4) # ssh –l john 110.0.0.10

            5) # ssh –l john 110.0.0.200

                [user@NSC-hostname /]# cd /access/SFO-DC7-R33-P3 

                [user@NSC-hostname /]# connect

             

            How to close your SSH session

            At the beginning of new a line (hit ENTER), type the hotkey defined for the SSH from a shell followed by a dot. The default hotkey is ~. (tilde dot)

            Or, enter ^Ec. and then type exit at the CLI prompt.

             

            Note: for the CLI text session hotkey: press and hold CTRL key plus E key; release them; then hit C and then (dot)


            Updated: 03 Aug 2019 11:02 AM
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