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80 Barracuda Spam Firewall Administrator’s Guide
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Impact of a Down LDAP Server
If your LDAP server goes down for any reason, your Barracuda Spam Firewall cannot authenticate
message recipients and the system creates an invalid account for each recipient that receives a
message. The system creates the invalid accounts until the LDAP server is back up.
To remove invalid accounts once the LDAP server is back up, refer to Overriding the Quarantine
Settings for Specific User Accounts on page 73. If you are using Unify Email Aliases, the Barracuda
Spam Firewall returns a 421 retry message to the connecting sending server because the primary e-
mail value cannot be found. This prevents duplicate user account from being created.
Common LDAP Settings for Standard Mail Servers
The following table provides common values you can use for the LDAP username, LDAP filter and
search base for standard mail servers.
Valid Email (for testing) This e-mail address is used in conjunction with the "Test LDAP"
button to determine whether the LDAP settings can locate the
provided address, and whether the proper attributes for LDAP UID
and LDAP Primary Email Alias have been provided.
Table 6.6:
Mail Server LDAP Setting
Microsoft Exchange 5.x LDAP username: cn=<username>,dc=<domain>,cn=admin
Example: cn=username,cn=users,dc=domain,dc=com
<Domain> should be the NT domain name and not the e-mail domain
(unless they are the same). The "admin" suffix is necessary to validate
hidden recipients.
Leave the LDAP filter and Search Base at the default setting.
Microsoft Exchange 2003 One of the best filters is:
(|(proxyaddresses=smtp:${recipient_email})(mail=${recipient_email}))
Lotus Domino receiving
messages for one domain
LDAP username: username@domain.com
LDAP filter:
(|(mail=${recipient_email})(cn=${recipient_local_part})(shortname=${rec
ipient_local_part})(fullname=${recipient_local_part}))
Table 6.5:
- Version 1
- Copyright Notice 2
- Trademarks 2
- Contents 3
- Chapter 1 9
- Introduction 9
- Overview 10
- Understanding Spam Scoring 11
- Figure 1.2: 11
- Inbound and Outbound Modes 12
- Technical Support 12
- Warranty Policy 12
- Table 1.1: 13
- Basic Tab 14
- Table 1.2: 14
- Block/Accept Tab 15
- Users Tab 15
- Domains Tab 15
- Advanced Tab 16
- Table 1.6: 17
- Chapter 2 19
- Pre-installation 19
- Deployment Types 20
- Pre-installation 21 21
- ISP Installation Deployment 22
- High Availability Deployment 23
- Chapter 3 25
- Step 2. Choose a Setup Type 26
- Table 3.1: 27
- Table 3.2: 28
- Port Forwarding 31
- MX Records 31
- Installation Examples 32
- Figure 3.2: 33
- Changing to Outbound Mode 34
- Table 3.4: 35
- Email Server Refer to 35
- Chapter 4 37
- Performance Statistics 38
- Subscription Status 39
- Monitoring the Message Log 40
- Classifying Messages 41
- Table 4.4: 42
- Button Description 42
- Overview of the Message Log 43
- Viewing Message Details 44
- Clearing the Message Log 44
- Table 4.6: 45
- Setting Description 45
- Table 4.7: 46
- Setting Description 46
- Table 4.8: 47
- Quarantine Type 47
- Location of Quarantined 47
- Messages 47
- Quarantine Responsibility 47
- Table 4.9: 48
- Table 4.10: 48
- Table 4.11: 49
- Table 4.12: 51
- Shutting Down the System 52
- Table 4.14: 53
- Table 4.15: 54
- Outlook Plu-In Description 54
- Resetting the Bayes Database 55
- Enabling Intent Analysis 56
- Reducing Backscatter 57
- Chapter 5 59
- Table 5.1: 60
- Blacklist Setting Description 60
- Table 5.2: 60
- Blacklist Service Description 60
- IP Address Filters 61
- Sender Domain Filters 62
- Sender Email Address Filter 63
- Attachment Type Filter 64
- Subject Line Filter 65
- Body Filter 66
- Header Filter 66
- Table 5.10: 67
- Chapter 6 69
- Managing Accounts and Domains 69
- Table 6.1: 70
- Column Description 70
- Table 6.2: 70
- Filter Description 70
- Editing User Accounts 71
- Table 6.3: 72
- User Feature Description 72
- To backup user settings: 74
- Setting Retention Policies 75
- Adding New Domains 75
- Editing Domain Settings 76
- Table 6.4: 77
- Table 6.5: 78
- Impact of a Down LDAP Server 80
- Table 6.6: 81
- Mail Server LDAP Setting 81
- Chapter 7 83
- Advanced Administration 83
- Table 7.1: 84
- Table 7.2: 86
- Performing Desktop Backups 87
- Restoring from a Backup File 88
- Spam Definition Updates 89
- Virus Definition Updates 90
- Table 7.8: 91
- Table 7.9: 93
- Syslog Field Description 93
- Table 7.10: 93
- Table 7.11: 94
- Cluster Set up Process 95
- Figure 7.1: 96
- Table 7.12: 96
- Table 7.13: 97
- Implementing Single Sign-on 99
- Enabling SSL 100
- Table 7.15: 101
- Table 7.16: 102
- Option Description 102
- Table 7.17: 103
- Field Description 103
- Troubleshooting 104
- Generating System Reports 105
- Specifying Report Properties 106
- Example Report 107
- Enabling SMTP over TLS/SSL 107
- Replacing a Failed System 108
- Reboot Options 109
- Table 7.22: 110
- Reboot Option Description 110
- Chapter 8 111
- Outbound 111
- About Outbound Mode 112
- Figure 8.1: 113
- Specifying Allowed Senders 114
- Table 8.4: 115
- Table 8.5: 115
- Table 8.6: 116
- Managing the Quarantine Box 117
- Table 8.7: 118
- Button Action 118
- Adding a Relay Server 119
- Chapter 9 121
- Quarantine Summary Report 122
- Table 9.1: 123
- Action Desciption 123
- Table 9.2: 124
- Appendix 1 129
- Regular Expressions 129
- Examples 130
- Regular Expressions 131 131
- \*FREE\* *FREE* 131
- Example Matches 131
- Appendix 2 133
- Exclusions and Restrictions 134
- Open Source Licensing 134
- Appendix 3 137
- Compliance 137
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