Konica Minolta bizhub C253 Series User manual

User’s Guide [Security Operations]
A02E-9692-11F C M YBK
http://konicaminolta.com
Copyright
2009
A02E-9692-11F
2010. 7
Ver. 1.01

C253/C203 x-1
Contents
Contents
1 Security
1.1 Introduction........................................................................................................................................... 1-2
Compliance with the ISO15408 Standard ................................................................................................1-2
Operating Precautions..............................................................................................................................1-2
INSTALLATION CHECKLIST ....................................................................................................................1-3
1.2 Security Functions................................................................................................................................ 1-4
1.2.1 Check Count Clear Conditions.................................................................................................................1-4
1.3 Data to be Protected ............................................................................................................................ 1-5
1.4 Precautions for Operation Control...................................................................................................... 1-6
Roles and Requirements of the Administrator..........................................................................................1-6
Password Usage Requirements ...............................................................................................................1-6
Operation and control of the machine......................................................................................................1-6
Network Connection Requirements for the Machine ...............................................................................1-7
Machine Maintenance Control..................................................................................................................1-7
Implementing digital signature properly ...................................................................................................1-7
Operating conditions for the IC card and IC card reader .........................................................................1-7
IC card owner requirements .....................................................................................................................1-7
1.5 Miscellaneous ....................................................................................................................................... 1-8
Password Rules........................................................................................................................................1-8
Precautions for Use of Various Types of Applications .............................................................................1-8
Types of Data Cleared by Overwrite All Data Function ............................................................................1-8
Items cleared by HDD Format ..................................................................................................................1-8
2 Administrator Operations
2.1 Accessing the Administrator Settings ................................................................................................ 2-2
2.1.1 Accessing the Administrator Settings ......................................................................................................2-2
<Setting can be made only from the control panel> ................................................................................2-3
2.1.2 Accessing the User Mode ........................................................................................................................2-5
<Setting can be made only from the control panel> ................................................................................2-5
2.2 Preventing Unauthorized Access........................................................................................................ 2-7
2.2.1 Setting Prohibited Functions When Authentication Error.........................................................................2-7
<Setting can be made only from the control panel> ................................................................................2-8
2.3 Setting the External Server................................................................................................................ 2-10
2.3.1 Setting the External Server.....................................................................................................................2-10
<Setting can be made only from the control panel> ..............................................................................2-10
2.4 System Auto Reset Function ............................................................................................................. 2-13
2.4.1 Setting the System Auto Reset function.................................................................................................2-13
<Setting can be made only from the control panel> ..............................................................................2-13
2.5 Changing the Administrator Password ............................................................................................ 2-15
2.5.1 Changing the Administrator Password...................................................................................................2-15
<Setting can be made only from the control panel> ..............................................................................2-15
2.6 Protecting Data in the HDD ............................................................................................................... 2-18
2.6.1 Setting the HDD Lock Password............................................................................................................2-18
<Setting can be made only from the control panel> ..............................................................................2-19
2.6.2 Changing the HDD Lock Password........................................................................................................2-21
<Setting can be made only from the control panel> ..............................................................................2-21
2.6.3 Setting the Encryption Key (encryption word) ........................................................................................2-24
<Setting can be made only from the control panel> ..............................................................................2-24
2.6.4 Changing the Encryption Key.................................................................................................................2-30
<Setting can be made only from the control panel> ..............................................................................2-30
2.7 Overwrite All Data Function............................................................................................................... 2-33
2.7.1 Setting the Overwrite All Data function ..................................................................................................2-33
<Setting can be made only from the control panel> ..............................................................................2-34

C253/C203 x-2
Contents
2.8 S/MIME Communication Setting Function....................................................................................... 2-36
2.8.1 Setting the S/MIME Communication ......................................................................................................2-36
<Setting can be made only from the control panel> ..............................................................................2-36
2.9 TCP/IP Setting Function..................................................................................................................... 2-40
2.9.1 Setting the IP Address............................................................................................................................2-40
<Setting can be made only from the control panel> ..............................................................................2-40
2.9.2 Registering the DNS Server....................................................................................................................2-41
<Setting can be made only from the control panel> ..............................................................................2-41
2.10 NetWare Setting Function.................................................................................................................. 2-42
2.10.1 Making the NetWare Setting...................................................................................................................2-42
<Setting can be made only from the control panel> ..............................................................................2-42
2.11 SMB Setting Function......................................................................................................................... 2-43
2.11.1 Setting the NetBIOS Name.....................................................................................................................2-43
<Setting can be made only from the control panel> ..............................................................................2-43
2.12 E-Mail Setting Function...................................................................................................................... 2-44
2.12.1 Setting the SMTP Server (E-Mail Server)................................................................................................2-44
<Setting can be made only from the control panel> ..............................................................................2-44
3 User Operations
3.1 User Authentication Function.............................................................................................................. 3-2
3.1.1 User authentication using the IC card ......................................................................................................3-2
<Setting can be made only from the control panel> ................................................................................3-3
3.2 Encrypted Document Function............................................................................................................ 3-5
3.2.1 Accessing the Encrypted document ........................................................................................................3-5
<Setting can be made only from the control panel> ................................................................................3-5
3.3 Scan to Me Function ............................................................................................................................ 3-8
3.3.1 Scan to Me procedure..............................................................................................................................3-8
<Setting can be made only from the control panel> ................................................................................3-8

1Security

C253/C203 1-2
Security 1
1 Security
1.1 Introduction
Thank you for purchasing our product.
This User’s Guide contains the operating procedures and precautions to be used when using the security
functions offered by the bizhub C253/C203 machine. To ensure the best possible performance and effective
use of the machine, read this manual thoroughly before using the security functions. The Administrator of the
machine should keep this manual for ready reference. The manual should be of great help in finding solutions
to operating problems and questions.
This User’s Guide (Ver. 1.01) describes bizhub C253/bizhub C203 PKI Card System Control Software (MFP
Controller: A02E0Y0-0100-GN0-U6).
Compliance with the ISO15408 Standard
The security functions offered by the bizhub C253/C203 machine comply with ISO/IEC15408 (level: EAL3).
Operating Precautions
The machine gives an alarm message or an alarm sound (peep) when a wrong operation is performed or a
wrong entry is made during operation of the machine. (No "peep" alarm sound is issued if a specific sound
setting in Sound Setting of Accessibility Setting is set to [OFF].) If the alarm message or alarm sound is given,
perform the correct operation or make the correct entry according to the instructions given by the message
or other means.
The Administrator of the machine should make sure that each individual general user exits from the current
mode to return to the basic screen whenever the access to that mode is completed or if the user leaves the
machine with the mode screen left displayed.
The Administrator of the machine should exit from the current mode to return to the basic screen whenever
the access to that mode is completed or if he or she leaves the machine with the mode screen left displayed.

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Security 1
INSTALLATION CHECKLIST
This Installation Checklist contains items that are to be check by the Service Engineer installing this machine.
The Service Engineer should check the following items, then explain each checked item to the Administrator
of the machine.
To Service Engineer
Make sure that each of these items is properly carried out by checking the box on the right of each item.
To make sure that the machine is used properly, make each setting according to the above checklist. Also,
make the necessary settings according to the above checklist whenever the machine is initialized by HDD
Format or Initialization to thereby make sure that the machine is in the correct operating condition.
When the above steps have been properly carried out, the Service Engineer should make a copy of this page
and give the original of this page to the Administrator of the machine. The copy should be kept at the corre-
sponding Service Representative for filing.
1. Perform the following steps before installing this machine. Completed
I swear that I would never disclose information as it relates to the settings of this machine to any-
body, or perform malicious or intentional act during setup and service procedures for the ma-
chine.
2. After this machine is installed, refer to the Service Manual and perform the following steps.
Check that the Firmware version (MFP Controller, CheckSum) indicated in the Service Manual
matches the values shown in the Firmware Version screen.
If there is a mismatch in the Firmware version number, explain to the Administrator of the machine
that upgrading of the Firmware is necessary and perform upgrading of the Firmware.
Set CE Authentication to [ON] and set the CE Password.
Check that CS Remote Care is set to RAM Clear Set, Internet ISW Setting to OFF, and HDD to
Installed.
3. After this machine is installed, refer to this User’s Guide and perform the following steps.
Check that the Administrator Password has been set by the Administrator of the machine.
Check that the HDD Lock Password or Encryption Key, or both, have been set by the Adminis-
trator of the machine.
Check that External Server has been set by the Administrator of the machine.
Check that Prohibited Functions When Authentication Error has been set to [Mode2] by the Ad-
ministrator of the machine.
Check that PageScope Web Connection has been set to [OFF] by the Administrator of the ma-
chine.
Check that Access Setting of OpenAPI has been set to [Restrict] by the Administrator of the ma-
chine.
Check that TCP Socket has been set to [OFF] by the Administrator of the machine.
Check that FTP Server has been set to [OFF] by the Administrator of the machine.
Check that Write Setting of SNMP v1/v2c Settings has been set to [Invalid] and SNMP v3(IP) has
been set to [OFF] by the Administrator of the machine.
The language, in which the contents of the User’s Guide Security Operations have been evaluat-
ed, is English.
Explain the way how to get the manual in the language, in which it is evaluated.
Explain to the administrator that the settings for the security functions for this machine have been
specified.
Product Name Company Name User Division Name Person in charge
Customer
Service Representative -

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Security 1
1.2 Security Functions
A password that can be set must meet the requirements of the Password Rules. The machine does not ac-
cept setting of an easily decipherable password. For details of the Password Rules, see "Password Rules"
on page 1-8.
If a wrong password is entered, during password authentication, a predetermined number of times (once to
five times) set by the Administrator of the machine or more, the machine determines that it is unauthorized
access through Prohibited Functions When Authentication Error, prohibiting any further entry of the pass-
word. By prohibiting the password entry operation, the machine prevents unauthorized use or removal of da-
ta, thereby ensuring secured used of the machine.
Setting the HDD Lock Password provides the following security function. That is, even if the HDD is illegally
replaced with another, the HDD authentication function prohibits access to the HDD, when the HDD Lock
Password is yet to be set or there is a mismatch in the passwords. In addition, should the HDD be removed
unawares, the HDD Lock Password locks the HDD protecting data contained in the HDD. Furthermore, by
mounting the optional Security Kit SC-503 and setting the Encryption Key, the data stored in the HDD is en-
crypted, thereby protecting the data in the HDD. Note, however, that the HDD Lock Password and Encryption
Key do not prevent the HDD from being physically removed. Make sure of a good operation control.
When the machine is to be discarded, or use of a leased machine is terminated at the end of the leasing con-
tract, the Overwrite All Data function overwrites and erases all data stored in all spaces of the HDD. The func-
tion also resets all passwords saved in the NVRAM to factory settings, preventing leak of data. For details of
items to be cleared by Overwrite All Data function, see "Types of Data Cleared by Overwrite All Data Func-
tion" on page 1-8.
1.2.1 Check Count Clear Conditions
The following are the conditions for clearing or resetting the check count of the number of wrong entries when
[Mode2] is set for Prohibited Functions When Authentication Error.
<Administrator Settings>
-Authentication of Administrator Settings is successful.

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Security 1
1.3 Data to be Protected
The underlying concept of this machine toward security is "to protect data that can be disclosed against the
intention of users."
The following types of image files that have been stored in the machine and made available for use by its
users are protected while the machine is being used.
-Encrypted document transmitted to the machine using a dedicated printer driver and an IC card from
the client PC and stored in the machine
-Image files which have been scanned for transmission to a user mail address through e-mail (S/MIME)
The following types of data stored in the HDD are protected when use of a leased machine is terminated at
the end of the leasing contract, the machine is to be discarded, or when the HDD is stolen.
-Encrypted document
-Scanned image files
-Image files of a job in the queue
-Image files other than Encrypted document
-Data files left in the data space used as image files
-Temporary data files generated during print image file processing

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Security 1
1.4 Precautions for Operation Control
This machine and the data handled by this machine should be used in an office environment that meets the
following conditions.
Roles and Requirements of the Administrator
The Administrator should take full responsibility for controlling the machine, thereby ensuring that no improp-
er operations are performed.
<To Achieve Effective Security>
-A person who is capable of taking full responsibility for controlling the machine should be appointed as
the Administrator to make sure that no improper operations are performed.
-When using an SMTP server (mail server) or an DNS server, each server should be appropriately man-
aged by the Administrator and should be periodically checked to confirm that settings have not been
changed without permission.
Password Usage Requirements
The Administrator must control the Administrator Password, HDD Lock Password and Encryption Key ap-
propriately so that they may not be leaked. These passwords should not be ones that can be easily guessed.
<To Achieve Effective Security>
-Make absolutely sure that only the Administrator knows the Administrator Password, HDD Lock Pass-
word and Encryption Key.
-The Administrator should set the Administrator Password using eight digits. (Selectable from among a
total of 92 characters)
-The Administrator must change the Administrator Password, HDD Lock Password and Encryption Key
at regular intervals.
-The Administrator should make sure that any number that can easily be guessed from birthdays, em-
ployee identification numbers, and the like is not set for the Administrator Password, HDD Lock Pass-
word and Encryption Key.
-If the Administrator Password has been changed by the Service Engineer, the Administrator should
change the Administrator Password as soon as possible.
Operation and control of the machine
The Administrator of the machine should perform the following operation control.
-The Administrator of the machine should log off from the Administrator Settings whenever the operation
in the Administrator Settings is completed. The Administrator of the machine should also make sure
that each individual user logs off from the User Authentication mode after the operation in the User Au-
thentication mode is completed, including operation of the Encrypted document.
-The Administrator of the machine should set the HDD Lock Password according to the environment, in
which this machine is used. If the machine is mounted with the optional Security Kit SC-503, the Ad-
ministrator should also set either the HDD Lock Password or Encryption Key, or both.
-The Administrator should enable Prohibited Functions When Authentication Error and control the oper-
ation of the machine for use in [Mode2].
-The Administrator should disable PageScope Web Connection and control the operation of the ma-
chine for use in the disable state.
– To disable PageScope Web Connection, press the [Utility/Counter] key, and then [Administrator Set-
tings] - [Network Settings] - [HTTP Server Settings] on the MFP control panel, and set "PSWC Settings"
to "OFF."
-The Administrator should disable OpenAPI and control the operation of the machine for use in the dis-
able state.
– To disable OpenAPI, press the [Utility/Counter] key, and then [Administrator Settings] - [System Con-
nection] - [OpenAPI Settings] on the MFP control panel, and set "Access Setting" to "Restrict."
-The Administrator should disable the TCP Socket and control the operation of the machine for use in
the disable state.
– To disable the TCP Socket, press the [Utility/Counter] key, and then [Administrator Settings] - [Network
Settings] - [Forward] - [TCP Socket Settings] on the MFP control panel, and set "TCP Socket" to "OFF."
-The Administrator should disable the FTP Server and control the operation of the machine for use in the
disable state.
– To disable the FTP Server, press the [Utility/Counter] key, and then [Administrator Settings] - [Network
Settings] - [FTP Settings] on the MFP control panel, and set "FTP Server Settings" to "OFF."

C253/C203 1-7
Security 1
-The Administrator should disable Write Setting of SNMP v1/v2c and control the operation of the ma-
chine for use in the disable state.
– To disable Write Setting of SNMP v1/v2c, press the [Utility/Counter] key, and then [Administrator Set-
tings] - [Network Settings] - [SNMP Settings] - [Forward] - [SNMP v1/v2c Settings] - [Forward] on the
MFP control panel, and set "Write Setting" to "Invalid."
-The Administrator should disable SNMP v3 and control the operation of the machine for use in the dis-
able state.
– To disable SNMP v3, press the [Utility/Counter] key, and then [Administrator Settings] - [Network Set-
tings] - [SNMP Settings] on the MFP control panel, and set "SNMP v3(IP)" to "OFF."
Network Connection Requirements for the Machine
If the LAN is to be connected to an outside network, no unauthorized attempt to establish connection from
the external network should be permitted.
<To Achieve Effective Security>
-If the LAN, in which the machine is installed, is connected to an outside network, install a firewall or
similar network device to block any access to the machine from the outside network and make the nec-
essary settings.
Machine Maintenance Control
The Administrator of the machine should perform the following maintenance control activities.
-Provide adequate control over the machine to ensure that only the Service Engineer is able to perform
physical service operations on the machine.
-Provide adequate control over the machine to ensure that any physical service operations performed
on the machine by the Service Engineer are overseen by the Administrator of the machine.
Implementing digital signature properly
The Administrator of the machine should make the setting for adding a digital signature by selecting either
[Always add signature] or [Select when sending]. He or she should make sure that the digital signature is add-
ed whenever an IC card owner sends highly confidential image data to the client PC.
Operating conditions for the IC card and IC card reader
The machine supports the following types of IC card and IC card reader.
-The types of IC cards supported by the machine are the Common Access Card (CAC) and Personal
Identity Verification (PIV).
-The type of IC card reader supported by the machine is AU-211P. Be sure to use the IC card reader
provided by the Service Representative. For details, ask your Service Representative.
IC card owner requirements
The Administrator of the machine should make sure that operating rules that specify the following operations
exist within the organization and that the operations are implemented according to the rules.
-The person responsible within the organization that uses the machine should distribute the IC card is-
sued for use by the organization to a specific person who is authorized to own the IC card.
-The person responsible within the organization that uses the machine should prohibit the user from
transferring or lending the IC card to any third person and make sure that the user reports any lost IC
card. If the IC card is lost, the system is at risk of being illegally accessed. In such cases, the registered
user in question should be deleted from the external server, so that the lost IC card is disabled for au-
thentication.
-The person responsible within the organization that uses the machine should make sure that each IC
card user removes his or her IC card from the card reader and never leaves the card in the card reader
after he or she completes the operation of the machine.

C253/C203 1-8
Security 1
1.5 Miscellaneous
Password Rules
According to certain Password Rules, registration of a password consisting of a string of a single character
or change of a password to one consisting of a string of a single character is rejected for the HDD Lock Pass-
word and Encryption Key. For the HDD Lock Password and Encryption Key, the same password as that cur-
rently set is not accepted.
Study the following table for more details of the number of digits and characters that can be used for each
password.
2
Note
Be sure to set the Administrator Password using eight digits to keep the security status. For details of
the Administrator Password Setting, see "Changing the Administrator Password" on page 2-15.
Precautions for Use of Various Types of Applications
When the Encrypted document function is to be used, be sure to install the dedicated printer driver in the
client PC.
Types of Data Cleared by Overwrite All Data Function
The Overwrite All Data function clears the following types of data.
Items cleared by HDD Format
Following are the items that are cleared by HDD Format.
2
Note
Performing HDD Format deletes the loadable driver installed in the machine, which calls for setting
made by the Service Engineer. For details, ask your Service Representative.
Types of passwords No. of digits Characters
Administrator Password 0 to 8 digits • Numeric characters: 0 to 9
• Alpha characters: upper and lower case letters
• Symbols: !, #, $, %, &, ', (, ), *, ,, -, ., /, :, ;, <, =, >, ?, @, [,
\, ], ^, _, `, {, |, }, ~
Selectable from among a total of 92 characters
HDD Lock Password 20 digits • Numeric characters: 0 to 9
• Alpha characters: upper and lower case letters
• Symbols: !, #, $, %, &, ', *, +, -, ., /, =, <, @, ^, _, `, {, |, }, ~
Selectable from among a total of 83 characters
Encryption Key
Types of Data Cleared Description
Encrypted document file Deletes all Encrypted document files saved in Encrypted document
User Box
Image files • Image files saved other than Encrypted document files
• Image files of jobs in job queue state
HDD Lock Password Clears the currently set password
Encryption Key Clears the currently set Encryption Key
Administrator Password Clears the currently set password, resetting it to the factory setting
S/MIME certificate data Deletes the currently set S/MIME certificate
External Server Deletes the currently set External Server
Loadable driver Deletes the currently set loadable driver
Types of Data Cleared Description
Encrypted document file Deletes all Encrypted document files saved in Encrypted document User Box
External Server Deletes the External Server
Loadable driver Deletes the loadable driver

2Administrator Operations

C253/C203 2-2
Administrator Operations 2
2 Administrator Operations
2.1 Accessing the Administrator Settings
This machine implements authentication of the user of the Administrator Settings function through the 8-digit
Administrator Password that verifies the identity as the Administrator of the person who accesses the func-
tion. During the authentication procedure, the Administrator Password entered for the authentication purpose
appears as "*" or "●" on the display.
Two different methods are available for accessing Administrator Settings. In Administrator Settings, the set-
ting for the machine system can be registered or changed. In User Mode, the same settings as the user au-
thority can be made. For box setting operations, however, the same functions can be set as those of
Administrator Settings. User Mode also allows jobs to be checked or deleted, which is not possible in Ad-
ministrator Settings.
2.1.1 Accessing the Administrator Settings
The machine does not accept access to the Administrator Settings under any of the following conditions.
Wait for some while before attempting to gain access to the Administrator Settings again.
-The Administrator Settings has been logged on to through access made from the PC.
-A remote operation is being performed from an application on the PC.
-There is a job being executed by the machine.
-There is a reserved job (timer TX, fax redial waiting, etc.) in the machine.
-Immediately after the main power switch has been turned ON.
-A malfunction code is displayed on the machine.
2
Note
Make sure that none of the general users of the machine will know the Administrator Password.
If the Administrator Password is forgotten, it must be set again by the Service Engineer. Contact your
Service Representative.
Do not leave the machine with the setting screen of Administrator Settings left shown on the display. If
it is absolutely necessary to leave the machine, be sure first to log off from the Administrator Settings.

C253/C203 2-3
Administrator Operations 2
<Setting can be made only from the control panel>
1Press the [Utility/Counter] key.
2Touch [Administrator Settings].
?Is it possible to gain access to the Administrator Settings while a job is being executed?
%The machine does not accept access to the Administrator Settings while a job is being executed.
Wait until the execution of the job is completed before attempting to access the Administrator Set-
tings again.
3Enter the 8-digit Administrator Password from the keyboard and keypad.
– Press the [C] key to clear all characters.
– Touch [Delete] to delete the last character entered.
– Touch [Shift] to show the upper case/symbol screen.
– Touch [Cancel] to go back to the screen shown in step 2.

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Administrator Operations 2
4Touch [OK].
?What happens if a wrong Administrator Password is entered?
%If a wrong Administrator Password is entered, a message appears saying that there is a mismatch
in the Administrator Passwords and entry of the Administrator Password will be prohibited for five
sec. Wait for some while before entering the correct Administrator Password.
%If Prohibited Functions When Authentication Error is set to [Mode2], entry of a wrong password is
counted as unauthorized access. If a wrong Administrator Password is entered a predetermined
number of times (once to five times) set by the Administrator of the machine or more, a message
appears saying that the machine accepts no more Administrator Passwords because of unautho-
rized access for any subsequent entry of the Administrator Password. The machine is then set into
an access lock state. To cancel the access lock state, settings must be made by the Service Engi-
neer; or, turn off, and then turn on, the main power switch of the machine. If the main power switch
is turned off and on, the access lock state is canceled after the lapse of time set for [Release Time
Settings]. When the main power switch is turned off, then on again, wait at least 10 seconds to turn
it on after turning it off. If there is no wait period between turning the main power switch off, then on
again, the machine may not function properly.
Here is the sequence, through which the main power switch and sub power switch are turned on
and off:
Turn off the sub power switch →Turn off the main power switch →Turn on the main power switch →
Turn on the sub power switch
5Press the [Utility/Counter] key to log off from the Administrator Settings.

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Administrator Operations 2
2.1.2 Accessing the User Mode
2
Note
Make sure that none of the general users of the machine will know the Administrator Password.
If the Administrator Password is forgotten, it must be set again by the Service Engineer. Contact your
Service Representative.
Do not leave the machine with the User Mode setting screen left shown on the display. If it is absolutely
necessary to leave the machine, be sure first to log off from the User Mode.
<Setting can be made only from the control panel>
1Touch [ID & PW].
2Touch [Password].

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Administrator Operations 2
3Enter the 8-digit Administrator Password from the keyboard and keypad.
– Press the [C] key to clear all characters.
– Touch [Delete] to delete the last character entered.
– Touch [Shift] to show the upper case/symbol screen.
– Touch [Cancel] to go back to the screen shown in step 2.
4Touch [OK].
5Press [Access] or touch [Login].
?What happens if a wrong Administrator Password is entered?
%If a wrong Administrator Password has been entered, the machine gives a message that tells that
authentication has not been successful. Enter the correct Administrator Password.
%If Prohibited Functions When Authentication Error is set to [Mode2], entry of a wrong password is
counted as unauthorized access. If a wrong Administrator Password is entered a predetermined
number of times (once to five times) set by the Administrator of the machine or more, a message
appears saying that the machine accepts no more Administrator Passwords because of unautho-
rized access for any subsequent entry of the Administrator Password. The machine is then set into
an access lock state. To cancel the access lock state, settings must be made by the Service Engi-
neer; or, turn off, and then turn on, the main power switch of the machine. If the main power switch
is turned off and on, the access lock state is canceled after the lapse of time set for [Release Time
Settings]. When the main power switch is turned off, then on again, wait at least 10 seconds to turn
it on after turning it off. If there is no wait period between turning the main power switch off, then on
again, the machine may not function properly.
Here is the sequence, through which the main power switch and sub power switch are turned on
and off:
Turn off the sub power switch →Turn off the main power switch →Turn on the main power switch →
Turn on the sub power switch
6Press the [Access] key to log off from the User Mode.

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Administrator Operations 2
2.2 Preventing Unauthorized Access
When access by the Administrator of the machine through the Administrator Settings via the control panel is
authenticated, the machine enables setting of the operation of Prohibited Functions When Authentication Er-
ror. The machine then takes a count of the number of unsuccessful accesses to the Administrator Settings
to prohibit the authentication operation.
Either [Mode 1] or [Mode 2] can be selected for Prohibited Functions When Authentication Error. The factory
setting is [Mode 1]. If [Mode2] is set, the check count can be selected from among once to five times. To
prevent unauthorized access, operate the machine in [Mode2]. If [Mode 2] is selected, the Release Time Set-
tings function is enabled. When the Administrator Settings is set into the access lock state, the main power
switch is turned off and on and, after the lapse of a predetermined period of time after the machine is turned
on again, the access lock state of the Administrator Settings is canceled. The Release Time Settings function
allows the period of time, after the lapse of which the access lock state of the Administrator Settings is can-
celed, to be set in the range between 1 and 60 min. The factory setting is 5 min. For details of each mode,
see the table below.
2
Note
If the access lock state of the Administrator Settings is canceled by the Service Engineer, the setting of
the Release Time Settings function is not applied.
2.2.1 Setting Prohibited Functions When Authentication Error
2
Note
Do not leave the machine with the setting screen of Administrator Settings left shown on the display. If
it is absolutely necessary to leave the machine, be sure first to log off from the Administrator Settings.
Release Time can be set to any value between 1 min. and 60 min. in 1-min. increments. An input data
error message appears when any value falling outside the range of 1 to 60 min. is set. Enter the correct
Release Time again.
Mode Description
Mode 1 If authentication fails, the authentication operation (entry of the password) is prohibited for 5 sec.
Mode 2 If authentication fails, the authentication operation (entry of the password) is prohibited for 5 sec.
The number of times, in which authentication fails, is also counted and, when the failure count
reaches a predetermined value, the authentication operation is prohibited and the machine is set
into an access lock state.

C253/C203 2-8
Administrator Operations 2
<Setting can be made only from the control panel>
0For the procedure to call the Administrator Settings to the display, see "Accessing the Administrator
Settings" on page 2-2.
1Call the Administrator Settings to the screen from the control panel.
2Touch [Security Settings].
3Touch [Security Details].
4Touch [Prohibited Functions When Authentication Error].

C253/C203 2-9
Administrator Operations 2
5Touch [Mode 2].
– To change the check count, touch [+] to increase the count or [-] to decrease it.
6Touch [Release Time Settings].
7Press the [C] key and, from the keypad, enter the time, after the lapse of which the access lock state of
the Administrator Settings is canceled.
8Touch [OK].