User manual BARRACUDA SPAM AND VIRUS FIREWALL 5.0 ADMINISTRATOR GUIDE

[. . . ] Barracuda Spam & Virus Firewall Administrator's Guide Version 5. x Barracuda Networks Inc. Campbell, CA 95008 http://www. barracuda. com Copyright Notice Copyright 2004-2010, Barracuda Networks www. barracuda. com v5. 0-101101-03-1102 All rights reserved. Information in this document is subject to change without notice. Trademarks Barracuda Spam & Virus Firewall is a trademark of Barracuda Networks. All other brand and product names mentioned in this document are registered trademarks or trademarks of their respective holders. 2 Barracuda Spam & Virus Firewall Administrator's Guide Contents Chapter 1 ­ Introduction . [. . . ] Configuration of LDAP lookup is done by domain from the DOMAINS > Domain Manager page. After clicking Manage Domain for the selected domain, you'll configure LDAP on the USERS > LDAP Configuration page. See the online help on that page for details about entering your server details. If LDAP is not configured, the Barracuda Spam & Virus Firewall will do SMTP recipient verification through RCPT TO commands. LDAP server types supported include Active Directory, Novell eDirectory, Domino Directory and OpenLDAP. 70 Barracuda Spam & Virus Firewall Administrator's Guide Explicit Users to Accept For (Valid Recipients) If LDAP lookup is not being used for recipient verification, the Barracuda Spam & Virus Firewall provides a local database with which email recipients can be compared for validation. Valid Recipients (Explicitly Accepted Users) can be specified either at the global level from the ADVANCED > Explicit Users page or at the per-domain level from the DOMAINS > Domain Manager > USERS > Valid Recipients page. Note that the number of entries in the text box for Explicitly Accepted Users and Alias Linking is limited based on the model of Barracuda Spam & Virus Firewall. On models 600 and lower the maximum is 1000 and on models 800 and above the limit is 5000 per domain. To administer the local database, either at the global or domain level, fill in the text box in the Explicit Users to Accept For section of the page, entering each email address for which the Barracuda Spam & Virus Firewall should accept email. If you select Yes for the Only accept email for these recipients feature, email will REJECTED for any email recipients not in the list. Note that domainspecific lists override the global list. Alias Linking Alias linking allows quarantined email from multiple accounts to be directed to one account when using per-user quarantine. In the ADVANCED > Explicit Users page you can specify the email addresses to be linked together in the Explicit Users to Accept For and Alias Linking text box. See the online help on that page for more details. The quarantine account for all of the linked email addresses will be associated with the first email address. Make sure to also enter the first email address on a separate line as well. In this way, a "catchall" account can be created to receive all quarantined emails from a particular domain. Remote IMAP/POP Accounts The Barracuda Spam & Virus Firewall provides an email-retrieval and forwarding utility which fetches email from remote mail servers and forwards it to your local machine's delivery system. This utility can gather mail from servers supporting POP3 and IMAP and is configured from the ADVANCED > Remote IMAP/POP page. Note that all email will be DELETED from the remote mail server after retrieval by the Barracuda Spam & Virus Firewall. There are two types of operations for each account from which the Remote Accounts utility retrieves mail: Global and User. With the User type, it is assumed that all messages in the user's account are intended for a single recipient. The Global type is used when multiple recipients under the same domain are specified for a particular server account. From the ADVANCED > Remote IMAP/POP page you can specify polling interval, SSL (yes/no), user account passwords and email addresses. Clustering the Barracuda Spam & Virus Firewall Deploying clustered Barracuda Spam & Virus Firewalls is easy - once you configure one of the devices, configuration settings are synchronized across the cluster almost immediately. Clustered systems can be geographically dispersed and do not need to be located on the same network. [. . . ] If You institute patent litigation against any entity (including a cross-claim or counterclaim in a lawsuit) alleging that the Work or a Contribution incorporated within the Work constitutes direct or contributory patent infringement, then any patent licenses granted to You under this License for that Work shall terminate as of the date such litigation is filed. 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