Security Information; Terminal Mode Commands; Input Restrictions - Dell 3250 Product Manual

Security Information

Terminal mode access to the BMC is governed by the user name and password configuration
through the SMU; before the server will accept terminal mode commands, a session must be
established. However, a limited selection of text commands and binary hex-ASCII commands that
are assigned the lowest IPMI privilege level are available before session establishment with the
BMC.
Since the terminal mode password is sent via clear text, the terminal mode session should take
place in a secure location over a secure link, preferably via a direct connection. Connection via a
modem is supported but not recommended.

Terminal Mode Commands

Input Restrictions

Terminal mode messages are bound by the restrictions listed below.
Syntax
Terminal mode messages follow the general syntax:
[<message data>]<newline sequence>
Each terminal mode message must be preceded with the left bracket start character and must be
ended with a right bracket stop character and the appropriate input newline sequence.
No input characters are accepted until the start character has been received.
Terminal mode text commands are case sensitive, but hex-ASCII commands can either use upper or
lower case letters for ASCII representations of hex digits.
Command Length
Terminal mode messages are limited to a maximum length of a 122 characters. This includes the
left and right brackets, but not control characters.
Character Support
Terminal mode messages are allowed to be composed of standard printable ASCII characters. All
other characters are treated as illegal characters.
Special Character Handling - <ESC> Character
The <ESC> character can be used to delete an entire message prior to submission to the BMC for
processing. If line editing is enabled, and the <ESC> key is followed by an input newline
sequence, the BMC responds by outputting an output newline sequence. Otherwise, the BMC goes
back to looking for the start character.
Special Character Handling - <DEL> or <BKSP> Character
The <BKSP> or <DEL> key can be used to delete the last character entered if the message has not
been submitted to the BMC yet.
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