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Lexmark MS517 Embedded Web Server--Security: Administrator s Guide - Page 48

Disk file wiping, Erasing temporary data files from the hard disk

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Securing data 48 Disk file wiping The file-based disk wipe sanitizes the portion of the hard disk where data was stored after a job has been processed to remove any residual data. Some devices uses hard disks to temporarily buffer scan, fax, print, and copy data that exceed the amount of RAM installed on the device. Buffered data can be deleted from the hard disk immediately after an original scan, fax, print or copy job is complete. Additionally, devices can temporarily hold print jobs on a hard disk if you use the Confidential Print and Print and Hold features or when held fax jobs are received and sent. This data remains on the hard disk until you print or delete the job, or until the document expires through the job expiration feature. When a data file is deleted from a hard disk, the data that is associated with that file is not actually deleted. This data remains on the hard disk and can be recovered with substantial effort. All printer models with a hard disk support an additional mechanism for protecting residual data, which is hard disk file wiping. Hard disk file wiping actively overwrites any job data files that are deleted. You have a choice of single or multiple passes to overwrite data, which removes all data residue from the deleted file. All permanent data on the hard disk is preserved, such as downloaded fonts, macros and held jobs. The multiple pass wiping process adheres to NIST and DoD (DoD 5220.22-M) guidelines for overwriting confidential data. Erasing temporary data files from the hard disk On devices that contain a hard disk, use the Erase Temporary Data Files option to remove residual confidential material and free up memory space. This setting securely uses random data patterns to overwrite files stored on the hard drive that have been marked for deletion. Overwriting can be accomplished with a single pass for a quick wipe, or with multiple passes for greater security. Note: If there is no hard disk installed on your device, then Erase Temporary Data Files is not available in the main Security menu. Using the Embedded Web Server 1 Click Settings > Security > Erase Temporary Data Files. Note: Wiping Mode can only be set to Auto. This setting automatically wipes the files that are no longer required for printing. 2 Modify the following settings: • Single Pass-Overwrite the printer hard disk in a single pass with a repeating bit pattern. This setting is the factory default. • Multi‑pass-Overwrite the printer hard disk with random bit patterns several times, followed by a verification pass. A secure overwrite is compliant with the DoD 5220.22M standard for securely erasing data from a hard disk. Use this method to wipe highly confidential information. 3 Click Submit. Using the control panel 1 Navigate to the menu screen, and then touch Security > Disk Wiping. 2 Select Single Pass or Multi‑pass. 3 Apply the changes.

Section	Page
Contents	2
Devices covered in this guide	4
Simple-security devices	4
Advanced-security devices	4
Managing authentication and authorization methods	5
Understanding the basics	5
Authentication and authorization	5
Groups	7
Access Controls	7
Security Templates	7
Accessing the Embedded Web Server	7
Simple-security device access controls	8
Creating a Web page password and applying access control restrictions	8
Creating a PIN and applying access control restrictions	9
Limiting access using Basic Security Setup	9
Advanced-security building blocks	10
Configuring advanced building blocks from the control panel	10
Creating a password building block for advanced security setup	10
Creating a PIN building block for advanced security setup	11
Setting up internal accounts	11
Connecting your printer to an Active Directory domain	13
Using LDAP	15
Using LDAP+GSSAPI	17
Configuring Kerberos 5 for use with LDAP+GSSAPI	19
Using a security template to control function access	20
Managing certificates and other settings	24
Installing a Certificate Authority certificate on the device	24
Configuring the device for certificate information	25
Sample certificate request data	25
Creating a new device certificate	26
Viewing, downloading, and deleting a certificate	26
Setting certificate defaults	27
Setting up a Certificate Authority certificate monitor	27
Downloading the Certificate Authority certificates	28
Managing devices remotely	29
Using HTTPS for device management	29
Setting a backup password	29
Setting up SNMP	30
Configuring security audit log settings	31
Updating firmware	33
Managing other access functions	34
Configuring confidential printing	34
Setting login restrictions	35
Enabling and disabling USB host ports	35
Enabling the security reset jumper	36
Enabling holding faxes	37
Enabling Operator Panel Lock	37
Securing network connections	39
Configuring 802.1X authentication	39
Configuring IP security settings	40
Connecting to a wireless network	41
Configuring the TCP/IP port access setting	42
Setting the restricted server list	42
Securing data	43
Physical lock	43
Disk encryption	44
Checking disk encryption status	45
Erasing settings (non-volatile memory)	45
Disk file wiping	48
Erasing temporary data files from the hard disk	48
Erasing hard disk data	49
Out-of-service wiping	50
Statement of volatility	51
Disposing of a hard disk	51
Erasing volatile memory	52
Erasing non-volatile memory	52
Security solutions	53
Print Release	53
Secure Held Print Jobs	53
Card Authentication	53
Smart Card authentication	54
Security scenarios	55
Scenario: Printer in a public place	55
Scenario: Standalone or small office	56
Scenario: Network running Active Directory	57
Scenario: More security-aware environment (802.1X) and SNMPv3	58
Scenario: Network-based usage restrictions using access card	58
Troubleshooting	60
Login troubleshooting	60
USB device is not supported	60
Make sure that a supported smart card reader is attached	60
Printer home screen fails to return to a locked state when not in use	60
Make sure that the authentication token is installed and running	60
Make sure that Smart Card Authentication is installed and running	60
Login screen does not appear when a smart card is inserted	60
Make sure that the smart card is recognized by the reader	60
KDC and MFP clocks are out of sync	61
Make sure that the date and time settings on the printer are correct	61
Kerberos configuration file is not uploaded	61
Make sure that the Kerberos file has been uploaded	61
Unable to authenticate users	61
Make sure that the Realm specified in the Kerberos settings is in uppercase	61
Domain controller certificate is not installed	61
Make sure that the correct certificate is installed on the printer	61
KDC did not respond within the required time	62
Make sure that the IP address or host name of the KDC is correct	62
Make sure that the KDC is available	62
Make sure that Port 88 is not blocked by a firewall	62
User realm not found in the Kerberos configuration file	62
Make sure that the Windows Domain is specified in the Kerberos settings	62
Cannot find realm on card in the Kerberos configuration file	62
Upload a Kerberos configuration file and make sure that the realm has been added to the file	62
Client is unknown	63
Make sure that the Domain Controller information is correct	63
Login does not respond at “Getting User Info”	63
User is logged out automatically	63
Increase the Panel Login Timeout interval	63
LDAP troubleshooting	63
LDAP lookups take a long time and then fail	63
Make sure that Port 389 (non-SSL) and Port 636 (SSL) are not blocked by a firewall	63
Make sure that the LDAP search base is not too broad in scope	63
LDAP lookups fail almost immediately	64
Make sure that the Address Book Setup contains the host name for the LDAP server	64
Make sure that the Address Book Setup settings are correct	64
Narrow the LDAP search base to the lowest possible scope that includes all necessary users	64
Make sure that the LDAP attributes for the user e-mail address and home directory are correct	64
Held Jobs / Print Release Lite troubleshooting	64
Cannot use the Held Jobs / Print Release feature	64
Add the user to the appropriate Active Directory group	64
Cannot determine Windows user ID	64
Make sure that Smart Card Authentication sets the user ID for the session	64
No jobs available for user	65
Make sure that the Smart Card Authentication sets the correct user ID	65
Make sure that the jobs were sent to the correct printer and were printed	65
Jobs are printing immediately	65
Make sure that Secure Held Print Jobs is installed and running	65
Make sure that all jobs are required to be held	65
Appendix	66
Appendix A: CA file creation	66
Appendix B: CA-Signed Device Certificate creation	66
Appendix C: Automatic Certificate Enrollment Application	66
Appendix D: Access controls	68
Appendix E: Common Criteria configuration	70
Overview	70
Supported printers	71
Before configuring the printer (required)	72
Checking physical interfaces and installed firmware	72
Attaching a lock	72
Encrypting the hard disk	73
Disabling the USB buffer	73
Installing the minimum Common Criteria configuration	74
Configuring disk wiping	74
Enabling the backup password (optional)	74
Creating user accounts	74
Creating security templates	75
Controlling access to device functions	75
Disabling home screen icons	77
Other settings required for Common Criteria configuration	78
Disabling the AppleTalk protocol	78
Shutting down port access	78
Network Time Protocol	79
Fax	79
Configuring and securing the application	80
Securing access to the home screen	81
Configuring user access for Common Criteria	81
Notices	84
Edition notice	84
Trademarks	84
GOVERNMENT END USERS	84
GifEncoder	85
ZXing 1.7	85
Apache License Version 2.0, January 2004	85
Glossary of Security Terms	89

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Disk ﬁle wiping

The ﬁle-based disk wipe sanitizes the portion of the hard disk where data was stored after a job has been

processed to remove any residual data.

Some devices uses hard disks to temporarily buﬀer scan, fax, print, and copy data that exceed the amount of

RAM installed on the device. Buﬀered data can be deleted from the hard disk immediately after an original

scan, fax, print or copy job is complete. Additionally, devices can temporarily hold print jobs on a hard disk if

you use the Conﬁdential Print and Print and Hold features or when held fax jobs are received and sent. This

data remains on the hard disk until you print or delete the job, or until the document expires through the job

expiration feature.

When a data ﬁle is deleted from a hard disk, the data that is associated with that ﬁle is not actually deleted. This

data remains on the hard disk and can be recovered with substantial eﬀort. All printer models with a hard disk

support an additional mechanism for protecting residual data, which is hard disk ﬁle wiping.

Hard disk ﬁle wiping actively overwrites any job data ﬁles that are deleted. You have a choice of single or

multiple passes to overwrite data, which removes all data residue from the deleted ﬁle.

All permanent data on the hard disk is preserved, such as downloaded fonts, macros and held jobs. The multiple

pass wiping process adheres to NIST and DoD (DoD 5220.22-M) guidelines for overwriting conﬁdential data.

Erasing temporary data ﬁles from the hard disk

On devices that contain a hard disk, use the Erase Temporary Data Files option to remove residual conﬁdential

material and free up memory space. This setting securely uses random data patterns to overwrite ﬁles stored

on the hard drive that have been marked for deletion. Overwriting can be accomplished with a single pass for

a quick wipe, or with multiple passes for greater security.

Note:

If there is no hard disk installed on your device, then Erase Temporary Data Files is not available in the

main Security menu.

Using the Embedded Web Server

Click

Settings

Security

Erase Temporary Data Files

Note:

Wiping Mode can only be set to

Auto

. This setting automatically wipes the ﬁles that are no longer

required for printing.

Modify the following settings:

•

Single Pass

—Overwrite the printer hard disk in a single pass with a repeating bit pattern. This setting is

the factory default.

•

Multi

‑

pass

—Overwrite the printer hard disk with random bit patterns several times, followed by a

veriﬁcation pass. A secure overwrite is compliant with the DoD 5220.22M standard for securely erasing

data from a hard disk. Use this method to wipe highly conﬁdential information.

Click

Submit

Using the control panel

Navigate to the menu screen, and then touch

Security

Disk Wiping

Select

Single Pass

Multi

‑

pass

Apply the changes.

Securing data