RSM Series; Remote Site Managers - User’s Guide
5.4.2. The Invalid Access Lockout Feature
When properly conﬁgured and enabled, the Invalid Access Lockout feature
will watch all login attempts made at all RSM ports. If a given port exceeds
the selected number of invalid attempts, then that port will be automatically
disabled for a user-deﬁned length of time. The Invalid Access Lockout feature
uses three separate counters to track invalid access attempts:
• Serial Port Counter: Counts invalid access attempts at each individual
serial port. If the number of invalid attempts at a given port exceeds the
user-deﬁned Lockout Attempts value, then that port will be locked.
• Raw Socket Counter: Counts invalid attempts to connect to a port
via Raw Socket protocol. If the number of invalid attempts at a given
port exceeds the user-deﬁned Lockout Attempts value, then Raw Socket
connections to that port will be locked.
• Telnet, SSH and Web Browser Counter: Counts all invalid attempts
to access command mode via Telnet, SSH or Web Browser interface. If
the number of cummulative invalid attempts exceeds the user-deﬁned
Lockout Attempts value, then the Network Port will be locked.
Note that when an Invalid Access Lockout occurs, you can either wait for the
Lockout Duration period to elapse (after which, the RSM will automatically
reactivate the port), or you can issue the /UL command (type /UL and press
[Enter]) via the Text Interface to instantly unlock all RSM serial ports.
• Invalid Access Lockout parameters, deﬁned via the System
Parameters menu, will apply to all RSM serial ports.
• When a Port is locked, an external modem connected to that port
will not answer.
• When a given RSM serial port is locked, the other RSM serial ports
will remain unlocked, unless the Invalid Access Lockout feature has
been triggered at those other ports.
• If any one of the RSM’s logical network ports is locked, all other
network connections to the unit will also be locked.
• All invalid access attempts at the RSM Network Port are cumulative
(the count for invalid access attempts is determined by the total
number of all invalid attempts at all 64 logical network ports.) If a
valid login name/password is entered at any of the logical network
ports, then the count for all RSM logical network ports will be
• A Port that has been locked by the Invalid Access Lockout feature
will still respond to the ping command (providing that the ping
command has not been disabled.)