Users Guide

NOTE: When consecutive login attempts are refused from the client IP address, some SSH clients may display the
following message:
ssh exchange identification: Connection closed by remote host
.
Table 6. Login Retry Restriction Properties
Property Definition
iDRAC.IPBlocking.BlockEnable
Enables the IP blocking feature. When consecutive failures (
iDRAC.IPBlocking.FailCount
) from a single IP address are encountered within a specific amount
of time (
iDRAC.IPBlocking.FailWindow
), all further attempts to establish a session from that address are
rejected for a certain timespan (
iDRAC.IPBlocking.PenaltyTime
).
iDRAC.IPBlocking.FailCount
Sets the number of login failures from an IP address before the login
attempts are rejected.
iDRAC.IPBlocking.FailWindow
The timeframe in seconds when the failure attempts are counted.
When the failures exceed this limit, they are dropped from the
counter.
iDRAC.IPBlocking.PenaltyTime
Defines the timespan in seconds when all login attempts from an IP
address with excessive failures are rejected.
Invalid password credentials
To provide security against unauthorized users and denial of service (DoS) attack, iDRAC provides the following before blocking the IP and
SNMP traps (if enabled):
• Series of sign-in errors and alerts
• Increased time intervals with each sequential incorrect login attempt
• Log entries
NOTE:
The sign-errors and alerts, increased time interval for each incorrect login, and log entries are available using any
of the iDRAC interfaces such as web interface, Telnet, SSH, Remote RACADM, WSMAN, and VMCLI.
Table 7. iDRAC web interface behavior with incorrect login attempts
Login
attempts
Blocking
(seconds)
Error
logged
(USR0003
4)
GUI display message SNMP alert (if
enabled)
First
incorrect
login
0 No None No
Second
incorrect
login
0 No None No
36 Logging in to iDRAC