Concept Guide

ssh {hostname} [-l username | -p port-number | -v {1 | 2}
hostname is the IP address or host name of the remote device. Enter an IPv4 or IPv6 address in dotted decimal format
(A.B.C.D).
● Configure the Dell Networking system as an SCP/SSH server.
CONFIGURATION mode
ip ssh server {enable | port port-number}
● Configure the Dell Networking system as an SSH server that uses only version 1 or 2.
CONFIGURATION mode
ip ssh server version {1|2}
●
Display SSH connection information.
EXEC Privilege mode
show ip ssh
The following example shows using the ip ssh server version 2 command to enable SSH version 2 and the show ip
ssh command to confirm the setting.
ell(conf)#ip ssh server version 2
Dell(conf)#do show ip ssh
SSH server : enabled.
SSH server version : v1 and v2.
SSH server vrf : default.
SSH server ciphers : aes256-ctr,aes256-cbc,aes192-ctr,aes192-cbc,aes128-
ctr,aes128-cbc,3des-cbc.
SSH server macs : hmac-sha2-256,hmac-sha1,hmac-sha1-96,hmac-md5,hmac-md5-96.
SSH server kex algorithms : diffie-hellman-group-exchange-sha1,diffie-hellman-group1-
sha1,diffie-hellman-group14-sha1.
Password Authentication : enabled.
Hostbased Authentication : disabled.
RSA Authentication : disabled.
Vty Encryption HMAC Remote IP
Dell(conf)#
To disable SSH server functions, use the no ip ssh server enable command.
Using SCP with SSH to Copy a Software Image
To use secure copy (SCP) to copy a software image through an SSH connection from one switch to another, use the following
commands.
1. On Switch 1, set the SSH port number (port 22 by default).
CONFIGURATION mode
ip ssh server port number
2. On Switch 1, enable SSH.
CONFIGURATION mode
ip ssh server enable
3. On Switch 2, invoke SCP.
CONFIGURATION mode
copy scp: flash:
4. On Switch 2, in response to prompts, enter the path to the desired file and enter the port number specified in Step 1.
EXEC Privilege mode
Other SSH-related commands include:
● crypto key generate: generate keys for the SSH server.
● debug ip ssh: enables collecting SSH debug information.
● ip scp topdir: identify a location for files used in secure copy transfer.
● ip ssh authentication-retries: configure the maximum number of attempts that should be used to authenticate a
user.
● ip ssh connection-rate-limit: configure the maximum number of incoming SSH connections per minute.
Security
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