Alcatel-Lucent 7705 SAR-8 System Management Manual page 124

Security Command Reference
SSH Commands
ssh
Syntax ssh
Context config>system>security
Description This command enables the context to configure the SSH server on the system. This command should
only be enabled or disabled no SSH session is running.
When the command is executed, an SSH security key is generated. This key is valid until either the
node is restarted or the SSH server is stopped with the no ssh command and restarted. The key size is
non-configurable and set at 1024 bits.
Quitting SSH while in the process of authentication is accomplished by either executing a ctrl-c or
"~." (tilde and dot), assuming the "~" is the default escape character for the SSH session.
Default ssh — The SSH server is enabled.
preserve-key
Syntax [no] preserve-key
Context config>system>security>ssh
Description This command specifies the persistence of the SSH server host key. When enabled, the host key will
be saved by the server and restored following a system reboot. This command can only be enabled or
disabled when no SSH session is running.
The no form of the command specifies that the host key will be held in memory by the SSH server
and not be restored following a system reboot.
Default no preserve-key
server-shutdown
Syntax [no] server-shutdown
Context config>system>security>ssh
Description
This command enables the SSH servers running on the system.
Default
At system startup, only the SSH server is enabled.
Page 124 7705 SAR OS System Management Guide