Filter
Top Products
4-49
Cisco Intrusion Prevention System CLI Sensor Configuration Guide for IPS 7.1
OL-19892-01
Chapter 4 Setting Up the Sensor
Configuring SSH
Use the ssh generate-key command to change the SSH server host key. The displayed fingerprint
matches the one displayed in the remote SSH client in future connections with this sensor if the remote
client is using SSH.
Note The sensor only supports RSA keys. Peers that communicate with IPS need to support RSA keys;
otherwise, the connection is not established.
To generate a new SSH server host key, follow these steps:
Step 1 Log in to the CLI using an account with administrator privileges.
Step 2 Generate the new server host key.
sensor# ssh generate-key
MD5: 93:F5:51:58:C7:FD:40:8C:07:26:5E:29:13:C8:33:AE
Bubble Babble: ximal-sudez-kusot-gosym-levag-fegoc-holez-cakar-kunel-nylis-kyxox
sensor#
Caution The new key replaces the existing key, which requires you to update the known hosts tables on remote
systems with the new host key so that future connections succeed. You can update the known hosts tables
on remote systems using the ssh host-key command.
Step 3 Display the current SSH server host key. The sensor displays the RSA1 (SSHv1) and the RSA (SSHv2)
keys.
sensor# show ssh server-key
RSA1 Key: 2048 65537 21281522654207836691935756443555553045267729811163188158123
19221105282706971156372834395971442406711584211050336190060471149429624658777668
77772213935517164097668879617982452141055538222385354775671320871325156194364534
01964293900473562985740703815287014221909604447874565966052932190994239169399973
09451774745322103150629685832787333113245586019053499876586171642882215702812368
29552879443164044336379548314607826859130457872422419997317349512539506437629934
62410481738789963850532157078406908293224279442047344280835594921181229802312694
953678513524852911662327237984274983550808940893737598517019547234622411280871
RSA1 Bubble Babble: xucor-gidyg-comym-zipib-pilyk-vucal-pekyd-hipuc-tuven-gigyr-fixyx
RSA Key: AAAAB3NzaC1yc2EAAAADAQABAAABAQC/zpG5nXqlAfc/aNzgQweipp9tjAqd1Xr5tuCJa+m
ccscEPHc25zUKLQG+8HkvieG2Pf11Y7mZk2POJICjXSV5izFczaFnZhBBUS+QOMH0nsk+S6F9Cujmz99
/OseRwQK16o2o2ds9otNfctAhVgex86SX5cWI0dyAYU1ZpwZCpK5sKxTtgzUkOEOSFPcHthf1DJvJfuj
1rWSJ/VAUHH4T5aomZ4m/is8jTp+nog5O5tDt6huqWYZt6MNTRoXTq0UgDgGOlueoGM6Sqk0nCwUlsBG
TNaEoJbN0elRk+qNnSGo4FQYLVCryMZYi6GOxZVxwPST3IGuEHTunAw6aUnRl
RSA Bubble Babble: xucot-sapaf-sufiz-duriv-rigud-kezol-tupif-buvih-zokap-sohoz-kixox
sensor#
For More Information
For the procedure for updating the known hosts table, see Adding Hosts to the SSH Known Hosts List,
page 4-45.