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and place the host public key in it. An entry for a public key in the known hosts file would appear similar to the following
example
:
10.1.0.54 1024 35 15684995401867669259333946775054617325313674890836547254
15020245593199868544358361651999923329781766065830956 10825913212890233
76546801726272571413428762941301196195566782 59566410486957427888146206
51941746772984865468615717739390164779355942303577413098022737087794545
24083971752646358058176716709574804776117
3.
Import Client's Public Key to the Switch – Use the copy tftp public-key command to copy a file containing the public key for
all the SSH client's granted management access to the switch. (Note that these clients must be configured locally on the
switch via the User Accounts page as described.) The clients are subsequently authenticated using these keys. The
current firmware only accepts public key files based on standard UNIX format as shown in the following example for an
RSA Version 1 key:
1024 35 1341081685609893921040944920155425347631641921872958921143173880
05553616163105177594083868631109291232226828519254374603100937187721199
69631781366277414168985132049117204830339254324101637997592371449011938
00609025394840848271781943722884025331159521348610229029789827213532671
31629432532818915045306393916643 steve@192.168.1.19
4.
Set the Optional Parameters – Set other optional parameters, including the authentication timeout, the number of retries,
and the server key size.
5.
Enable SSH Service – Use the ip ssh server command to enable the SSH server on the switch.
6.
Authentication – One of the following authentication methods is employed: Password Authentication (for SSH v1.5 or V2
Clients)
a.
The client sends its password to the server.
b.
The switch compares the client's password to those stored in memory.
c.
If a match is found, the connection is allowed.
To use SSH with only password authentication, the host public key must still be given to the
client, either during initial connection or manually entered into the known host file. However,
you do not need to configure the client's keys.
Public Key Authentication – When an SSH client attempts to contact the switch, the SSH server uses the host key pair to
negotiate a session key and encryption method. Only clients that have a private key corresponding to the public keys stored on
the switch can access it. The following exchanges take place during this process:
446
User's Manual of IGSW-2840
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