Securing Novell GroupWise through SSL and S/MIME

Securing Novell GroupWise ® ®

through SSL and S/Mime

Dirk Giles
GroupWise Software Engineer
dpgiles@novell.com

Mukesh Jethwani
Novell WorldWide Support Engineer
mjethwani@novell.com

Agenda

• LDAP authentication and Novell GroupWise
® ®

Post Offices

• Novell GroupWise Agents and SSL

– Certificate Generation

– Installing and Enabling SSL

– Securing GWIA and WebAccess agents

• Secure Internet Email with S/MIME

2 © Novell, Inc. All rights reserved.

Why Use LDAP Authentication?

• Uses user's directory password
– Minimizes password management requirements

– Supports password policies (Bind Mode)

– Less passwords for the user to remember

• Can authenticate to other LDAP directories
• Requires that users connect to the directory
– Note: Directory accounts without a password will
not require a password, even with a High Security
Post Office


LDAP Authentication Planning

• LDAP Server information
– Use SSL or not?
> SSL key file

– IP Address or name of LDAP server

– LDAP port for LDAP server

– User authentication method
> Bind

> Compare


LDAP Authentication Planning Part 2

• Use proxy user?
– Access the directory with limited rights

– Need distinguished name (DN)

– Need password

• Allow users to change password?
– Novell GroupWise Client Change Password dialog
® ®


Export LDAP Certificate
Which One?


Certificate Properties


Export Wizard – No Private Key


Export Wizard – Output Format and Filename


LDAP Server Configuration
Novell GroupWise System Tools
® ®


LDAP Server List


LDAP Server Options


Post Office Configuration
Security Settings


Post Office Configuration
LDAP Server Selection


LDAP Authentication Demonstration

Securing Novell GroupWise with SSL
® ®

Novell GroupWise Security and SSL
® ®

• Enhances native messaging encryption

• Ensures secure communication between the
Post Office Agent and clients

• Ensures secure communication between the
Novell GroupWise agents

• Secures Web Console and WebAccess


Where Do I Start?

1. Get a certificate!
– Generate a Certificate Signing Request (CSR)

> Each separate server should have its own

> Agents running on the same server can share


Generate Certificate Signing Request
Novell GroupWise Generate CSR Utility (GWCSRGEN)
® ®


Request the Certificate

• Submit the certificate signing request to a
certificate authority
– Trusted Certificate Authorities

– Online submission mechanisms

– Create your own


Create a Certificate

• Novell Certificate Server and Novell eDirectory
™
®
™

– ConsoleOne ®

> Requires the Novell Certificate Server snap-in

– iManager
> Requires the Novell Certificate Server plug-in module

• YaST on Linux
– Novell Open Enterprise Server

– SUSE Linux Enterprise Server
®


Create a Certificate using
Novell Certificate Server ™

• Enter certificate signing request

• Select key type and usage

• Select validity period

• Select output format and filename


Issuing a Certificate with ConsoleOne ®

Issue Certificate Wizard



Enter certificate signing request



Select key type and usage



Select validity period



Select output format and filename


Issuing a Certificate with YaST
Enter Certificate Authority


Select Export to File


Select output format and filename


Save certificate


Save key


Certificate Generation Demonstration

Install the Certificate

2. Install the certificate!
– Use ConsoleOne to designate the certificate
®

and key paths
– Enter the password of the key file


Configure Access
Network Access Tab

3. Enable SSL and configure access
– Disabled, Enabled, and Required
– Internal versus External


Equivalent Command Line Options


GWPOA Certificate
Installation Demonstration

Securing Novell GroupWise Internet Agent
® ®

Securing the Novell GroupWise ® ®

Internet Agent with SSL
• Secure Connections to other SMTP hosts

• Secure Connections for POP/IMAP clients

• Secure Connections to WebConsole
– SSL Enabled or Required for the above?


Securing the GWIA with SSL
Install the Certificate


Securing the GWIA with SSL
Enabling SSL


Securing Novell GroupWise
® ®

Internet Agent Demonstration

Securing Novell GroupWise WebAccess
® ®

Securing WebAccess with SSL

• Securing WebAccess Agent - WebConsole

• Securing WebAccess Application (Apache/IIS)


Securing WebAccess Agent
Install Certificate


Securing WebAccess Agent
Enabling SSL


Securing WebAccess Agent Demonstration

Securing WebAccess Application
Linux - Apache

• Modify /etc/sysconfig/apache
– APACHE_SERVER_FLAGS=” SSL”
• Modify /etc/apache2/vhosts.d/vhost-ssl.conf


Linux - Apache

• Restart apache2 by typing “rcapache2 restart”

• If the Private Key has a password restarting apache will
ask for the password during the restart. Follow the step
listed below to remove the password from the Key file
– openssl rsa -in gw.key -out gwu.key

– Also protect gwu.key by making sure only root can read
gwu.key by typing “chmod 700 gwu.key”

• Modify the /etc/apache2/vhosts.d/vhost-ssl.conf with
the unencrypted key file


Securing Apache on Linux Demonstration

NetWare - Apache ®

• Apache on NetWare by default enables SSL but uses
the internal Certificates

• Follow TID 3033173 to import Certificate from a Public
CA to Novell eDirectory ®
™

• Modify SYS:APACHE2CONFHTTPD.CONF file
– SecureListen 443 “SSL CertificateDNS”

• Restart apache by typing ap2webdn and ap2webup


Windows 2008 - IIS


Windows 2008 - IIS

Sign the CSR using ConsoleOne and issue the
®

certificate in a der format

OR

Send the CSR to the Public CA and get the Certificate


Windows 2008 - IIS


Enabling SSL


Securing IIS on Windows Demonstration

Secure Internet Email with S/MIME

Secure Internet Email with S/MIME

• What is S/MIME
– Digital Signature
– Encryption (Symmetric vs Asymmetric)

• Advantages and Disadvantages

• Creating and Importing User Certificates (Public Key
and Private Key)

• Exchanging Public Keys/Certificates

• Encrypting/Decrypting Mails

What is S/MIME?

• S/MIME is an acronym for Secure/Multipurpose
Internet Mail Extensions

• It is a standard for Public Key Encryption and signing
of MIME Data. In simple terms, it is used for Digitally
signing a message and/or Encrypting a message
– Digital Signature

– Encryption


Digital Signature

• Signature – A signature in simple terms is a
handwritten depiction of someone's name or a
nickname that a person writes on documents as a
proof of identity and intent

• Digital Signature is an electronic signature used to
authenticate the identity of the sender of a message
and possibly to ensure that the original content of
the message or document that has been sent is
unchanged. The ability to ensure that the original
signed message arrived means that the sender
cannot easily repudiate it later.


Encryption

• Encryption – A process of transforming information
using an information to make it unreadable to anyone
except those possessing special knowledge

• Two types of Encryption
– Symmetric vs Asymmetric?


Symmetric vs Asymmetric

• Symmetric
– Same key is used for Encryption and Decryption

• Asymmetric
– Separate keys are used for Encryption and Decryption


Advantages/Disadvantages

• Advantages
– Authenticity and Protection of the Message

• Disadvantages
– Not all email software handles S/MIME signatures

– S/MIME Encryption is currently not available for the Novell ®

GroupWise Linux, Mac, or WebAccess clients
®


Creating and Importing User Certificates
(Public Key and Private Key)

• Administrator
– Creates the Public Key and Private Key

• Users
– Export the Private Key and the Public Key

• Users
– Import the Public Key and Private Key into the Client


Creating User Certificates
Login to iManager as admin


Create Certificate for users


Importing User Certificates
Administrator sets the URL


User Imports the Certificate


Exchanging Public Keys/Certificates

• Sender
– Sends a digitally signed message

• Receiver
– Receiver receives the digitally signed message along with the
Certificate


Exchanging Public Key
Sender sends Digitally Signed Message


Exchanging Public Keys
Receiver receives Digitally Signed Message along
with the sender's Certificate


Encrypting/Decrypting Mails

• Sender (Original Receiver)
– Encrypts an email using the Receivers Certificate

• Receiver (Original Sender)
– Decrypts it using his/her Private Key


Send Encrypted Message


Receive Encrypted Message


Overview

• User1 sends a digitally signed message to User2

• User2 receives the digitally signed message along with
the certificate

• Now User2 can send an encrypted message to User1

• User1 decrypts the message with the Private Key


Securing Novell GroupWise through SSL and S/MIME

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General Disclaimer
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product. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in
making purchasing decisions. Novell, Inc. makes no representations or warranties with respect to the contents
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Securing Novell GroupWise through SSL and S/MIME

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