309
Step Command
Remarks
3.
Set the minimum update
interval for the RSA server key
pair.
ssh server rekey-interval
hours
By default, the RSA server key pair
is not updated.
This command takes effect only on
SSH1 users.
This command is not available in
FIPS mode.
4.
Set the SSH user
authentication timeout timer.
ssh server authentication-timeout
time-out-value
The default setting is 60 seconds.
If a user does not finish the
authentication when the timeout
timer expires, the connection
cannot be established.
5.
Set the maximum number of
SSH authentication attempts.
ssh server authentication-retries
times
The default setting is 3.
If a user does not finish the
authentication when the timeout
timer expires, the connection
cannot be established.
6.
Specify an ACL to control SSH
user connections.
•
Control IPv4 SSH user
connections:
ssh server acl
acl-number
•
Control IPv6 SSH user
connections:
ssh server ipv6 acl
[
ipv6
]
acl-number
By default, no ACLs are specified
and all SSH users can initiate
connections to the server.
7.
Set the DSCP value in the
packets that the SSH server
sends to the SSH clients.
•
Set the DSCP value in IPv4
packets:
ssh server dscp
dscp-value
•
Set the DSCP value in IPv6
packets:
ssh server ipv6 dscp
dscp-value
The default setting is 48.
The DSCP value of a packet
defines the priority of the packet
and affects the transmission
priority of the packet. A bigger
DSCP value represents a higher
priority.
8.
Configure the SFTP
connection idle timeout timer.
sftp server idle-timeout
time-out-value
The default setting is 10 minutes.
When the idle timeout timer
expires, the system automatically
terminates the connection.
9.
Specify the maximum number
of concurrent online SSH
users.
aaa session-limit ssh
max-sessions
The default setting is 32.
When the number of online SSH
users reaches the upper limit, the
system denies new SSH connection
requests.
Changing the upper limit does not
affect online SSH users.