                   Doctor Web, Ltd.

             Dr.Web(R) for Unix-like systems
                     User Licenses

                     Version 4.33
                
====================================================================
The material published herein is the property of Doctor Web, Ltd.
and may not be reproduced in any form without written permission of
Doctor Web, Ltd. and proper attribution.

Dr.Web is a registered trademark of Doctor Web, Ltd.

Other product names mentioned herein are trademarks or registered
trademarks of their respective companies.

There might be further improvements and changes in the software not
described in this manual. The corrected and supplemented versions of
this manual are available at www.drweb.com.
====================================================================

(C) Doctor Web, Ltd., 2005
Russia, Moscow - Saint Petersburg
http://www.drweb.com/


          CONTENTS

1. Command line scanners
2. Corporate mail protection
3. File servers protection
4. Internet Gateway protection
5. Contacts



There exist four main types of licenses for Unix-based versions of
Dr.Web, one for the scanner and three for the daemon.

The licenses can be purchased for definite terms, i.e. for 6, 12 or 24
months. The license terms and the quantitative parameters and
limitations for different regional partners of Doctor Web, Ltd. may vary
or be revised. To learn more about regional license terms, contact our
partner in your region listed on the web-site of Doctor Web, Ltd.
(http://partners.drweb.com/list/)

When buying a license, during the whole license term, you have the right
to update from the Dr.Web(R) Global Updating system servers and to
receive a standard technical support of Doctor Web, Ltd. and its
partners.


        1. Command line scanners (http://buy.drweb.com/home/)

This license allows operation with Dr.Web(R) antivirus scanner for Unix
(both with graphical interface module and with the console scanner), as
well as with other types of command line scanners for Windows, MS DOS,
OS/2.


        2. Corporate mail protection (http://buy.drweb.com/business/)

This is a license for the Dr.Web daemon which enables scanning of mail
messages passed to a daemon by filters from CoomuniGate Pro, Sendmail,
Postfix, Exim, QMail, ZMailer, Courier-MTA, MIO Mail Server mail
servers. 

This license is not for integration of the daemon with file servers and
Internet gateways, but enables their complex usage.

Below are described the licenses for mail servers.

    2.1 Licensing per traffic

This license allows to use the daemon for scanning messages of any
number of users, with the number of messages limited per day. The
messages containing viruses, or those that can not be scanned due to
their internal errors, are not taken into account.

When the day limit is exhausted, the daemon will suspend scanning
messages and the relevant return code will be sent to the mail filter.
Administrator can set up the filter (see the description of the
LicenseLimit parameter of the configuration file) so that either to
admit, or reject such message; in CommuniGate Pro mail filter there
exists an option to postpone the delivery of a message for some time for
another scanning.

    2.2 Licening per addresses

This license allows to use the daemon for scanning messages (incoming
and out-going) of specified number of mail addresses and of an unlimited
quantity of messages per day. 

If 15- or 30-address license is chosen, all the protected addresses
should be explicitly specified in a special file (see the description of
the MailAddressesList parameters). The file  is rather simple: one
line per one address. First several lines (as specified in the license)
are read only, regardless whether the line is empty or not, the rest is
ignored.

To determine whether a particular address should be scanned or not, the
daemon uses the addresses from the SMTP-envelope (see RFC 2821). To make
the daemon scan a message, one of the addresses from the SMTP-envelope
must be in full conformity with one of the "protected" addresses
(case-insensitive comparison is applied). That is why, if, for the
address foo@bar.example.com the messages can be sent with the address
foo, foo@bar.example.com or foo@example.com, the three of them should be
listed in the corresponding file.

If a message is not identified as "for scanning", the daemon will not
scan it and the relevant return code will be sent to a filter.
Administrator can adjust the filter (see the description of the
LicenseLimit parameter of the filter's configuration file) so that
either to admit, or reject such messages.

If 50-address license is chosen, explicit specification of addresses
is not required so far. Still, Doctor Web, Ltd. reserves the right
to control in future the conformity of number of scanned addresses
with the number specified in the license.

    2.3 Licensing per servers

This license allows to use the daemon for scanning unlimited number of
messages of an unlimited number of user, but is limited per server.

    2.4 Unlimited license

This license allows to user the daemon for scanning unlimited number of
messages of an unlimited number of users on an unlimited number of
servers.


        3. File servers protection (http://buy.drweb.com/business/)

This is the license for the Dr.Web daemon which allows to use the
daemon for scanning the shared resources in the Samba file servers
(versions 2.2.2 or higher).

This license does not allow to use the daemon for integration with mail
servers or Internet gateways, but enables their complex usage.


        4. Internet Gateway protection (http://buy.drweb.com/business/)

This is the license which enables scanning of incoming HTTP traffic
going through proxy servers supporting the icap-protocol (Squid,
SafeSquid and Shewby). Scanning of incoming FTP traffic for Squid proxy
servers is also possible.

The solution is licensed per users working through the gateway. Minimal
license is for 20 users.

This license does not allow to use the daemon for integration with mail
or file servers, but enables their complex usage.


        5. Contacts

Dr.Web program gets constantly developed, for fresh updating
information and news please visit our site:
  http://www.drweb.com

Marketing dept.:
  http://buy.drweb.com
  e-mail: sales@drweb.com
