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Lexmark MX718 Embedded Web Server--Security: Administrator s Guide - Page 19

Configuring Kerberos 5 for use with LDAP+GSSAPI, Notes, Delete List, Settings, Security

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Managing authentication and authorization methods 19 Notes: • Click Delete List to delete all LDAP+GSSAPI setups in the list. • An LDAP+GSSAPI building block cannot be deleted if it is being used as part of a security template. Configuring Kerberos 5 for use with LDAP+GSSAPI Note: This feature is available only in advanced‑security devices. Kerberos 5 can be used by itself for user authentication, but it is most often used with the LDAP+GSSAPI building block. While only one Kerberos configuration file (krb5.conf) can be stored on a supported device, that file can apply to multiple realms and Kerberos Domain Controllers (KDCs). An administrator must anticipate the different types of authentication requests that the Kerberos server might receive, and configure the krb5.conf file to handle these requests. Notes: • Because only one krb5.conf file is used, uploading or resubmitting a simple Kerberos file overwrites the configuration file. • The krb5.conf file can specify a default realm. But if a realm is not specified in the configuration file, then the first realm specified is used as the default realm for authentication. • Some types of authentication relies on an external server. If an outage prevents the printer from communicating with the server, then users are able to access protected device functions. • To help prevent unauthorized access, log out from the printer after each session. Creating a simple Kerberos configuration file 1 From the Embedded Web Server, click Settings > Security > Security Setup. 2 Under Advanced Security Setup, click Kerberos 5. 3 Type the KDC (Key Distribution Center) address or host name in the KDC Address field. 4 Enter the number of the port (between 1 and 65535) used by the Kerberos server in the KDC Port field. The default port number is 88. 5 Type the realm (or domain) used by the Kerberos server in the Realm field. 6 Click Submit to save the information as a krb5.conf file on the selected device, or Reset Form to reset the fields and start again. Uploading a Kerberos configuration file 1 From the Embedded Web Server, click Settings > Security > Security Setup. 2 Under Advanced Security Setup, click Kerberos 5. 3 Click Browse, and then select the krb5.conf file. 4 Click Submit to upload the krb5.conf file to the selected device. The Embedded Web Server automatically tests the krb5.conf file to verify that it is functional. Notes: • To reset the field and search for a new configuration file, click Reset Form. • To remove the Kerberos configuration file from the selected device, click Delete File.

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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Notes:

•

Click

Delete List

to delete all LDAP+GSSAPI setups in the list.

•

An LDAP+GSSAPI building block cannot be deleted if it is being used as part of a security template.

Conﬁguring Kerberos 5 for use with LDAP+GSSAPI

Note:

This feature is available only in advanced

‑

security devices.

Kerberos 5 can be used by itself for user authentication, but it is most often used with the LDAP+GSSAPI building

block. While only one Kerberos configuration file (krb5.conf) can be stored on a supported device, that file can

apply to multiple realms and Kerberos Domain Controllers (KDCs). An administrator must anticipate the diﬀerent

types of authentication requests that the Kerberos server might receive, and conﬁgure the krb5.conf ﬁle to

handle these requests.

Notes:

•

Because only one krb5.conf ﬁle is used, uploading or resubmitting a simple Kerberos ﬁle overwrites the

conﬁguration ﬁle.

•

The krb5.conf file can specify a default realm. But if a realm is not specified in the configuration file, then

the ﬁrst realm speciﬁed is used as the default realm for authentication.

•

Some types of authentication relies on an external server. If an outage prevents the printer from

communicating with the server, then users are able to access protected device functions.

•

To help prevent unauthorized access, log out from the printer after each session.

Creating a simple Kerberos conﬁguration ﬁle

From the Embedded Web Server, click

Settings

Security

Security Setup

Under Advanced Security Setup, click

Kerberos 5

Type the KDC (Key Distribution Center) address or host name in the KDC Address ﬁeld.

Enter the number of the port (between 1 and 65535) used by the Kerberos server in the KDC Port ﬁeld. The

default port number is 88.

Type the realm (or domain) used by the Kerberos server in the Realm ﬁeld.

Click

Submit

to save the information as a krb5.conf ﬁle on the selected device, or

Reset Form

to reset the

ﬁelds and start again.

Uploading a Kerberos conﬁguration ﬁle

From the Embedded Web Server, click

Settings

Security

Security Setup

Under Advanced Security Setup, click

Kerberos 5

Click

Browse

, and then select the krb5.conf ﬁle.

Click

Submit

to upload the krb5.conf ﬁle to the selected device.

The Embedded Web Server automatically tests the krb5.conf ﬁle to verify that it is functional.

Notes:

•

To reset the field and search for a new configuration file, click

Reset Form

•

To remove the Kerberos conﬁguration ﬁle from the selected device, click

Delete File

Managing authentication and authorization methods