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Appendix A
Regular Expressions
The Barracuda SSL VPN allows you to use regular expressions in many of its features. Regular Expressions allow
you to flexibly describe text so that a wide range of possibilities can be matched.
When using regular expressions:
• Be careful when using special characters such as |, *, '.' in your text. For more
information, refer to Using Special Characters in Expressions on the next page.
• All matches are not case sensitive.
Table A.1 describes the most common regular expressions supported by the Barracuda SSL VPN.
Table A.1: Common Regular Expressions
Expression Matches...
Operators
* Zero or more occurrences of the character immediately preceding
+ One or more occurrences of the character immediately preceding
? Zero or one occurrence of the character immediately preceding
| Either of the characters on each side of the pipe
( ) Characters between the parenthesis as a group
Character Classes
. Any character except new line
[ac] Letter 'a' or letter 'c'
[^ac] Anything but letter 'a' or letter 'c'
[a-z] Letters 'a' through 'z'
[a-zA-Z.] Letters 'a' through 'z' or 'A' through 'Z' or a dot
[a-z\-] Letters 'a' through 'z' or a dash
\d Digit, shortcut for [0-9]
[^\d] Non-digit
\a Digit, shortcut for [0-9]
\w Part of word: shortcut for [A-Za-z0-9_]
[^\w] Non-word character
- Version 1.0 1
- Copyright Notice 2
- Trademarks 2
- ACCESS CONTROL 3
- RESOURCE MANAGEMENT 4
- WEB FORWARDING 4
- NETWORK PLACES 5
- SYSTEM FUNCTIONS 5
- Chapter 1 6
- Overview 7
- Barracuda SSL VPN Models 8
- Chapter 2 9
- Getting Started 9
- Initial Setup 10
- Opening Firewall Ports 11
- Deployment Scenarios 15
- Non-DMZ! 15
- Within the DMZ 15
- Barracuda SSL VPN 16
- Statistic 19
- Description 19
- Viewing System Tasks 20
- Replacing a Failed System 21
- Purpose 23
- Switching Views 23
- Accessibility 24
- Checking Status 24
- Configuring User Databases 25
- Organizational Units (OUs) 28
- Organizational Unit Filter 28
- Troubleshooting 28
- Configuring LDAP 30
- Password Options 33
- Password Pattern 33
- Session Options 33
- Confidential Attributes 34
- Appearance 35
- SSL Certificates 36
- Creating a CA 37
- Importing a Certificate 38
- Attributes 41
- Web Forwards 42
- Types of Attributes 43
- Attribute Interface 43
- Actions Icons 43
- Creating Attributes 44
- Editing an Attribute 45
- Deleting an Attribute 45
- How to use Attributes 46
- Session Variable 46
- Access Control 48
- Introduction 48
- Levels of Trust 49
- Access Control Architecture 49
- What is a Resource? 50
- What is a Principal? 50
- What is a Policy? 50
- What is Permission? 50
- Creating Accounts 52
- Create New Account 53
- Assigning Groups 54
- Editing an Account 54
- Deleting an Account 54
- Creating Groups 55
- Groups Interface 56
- Action Icon 56
- Create New Group 56
- Editing a Group 56
- Delete Group 56
- Creating Policies 57
- Policy Interface 58
- Create Policy 58
- Editing a Policy 60
- Delete Policy 60
- Creating Access Rights 61
- Creating an Access Right 62
- Editing Access Rights 63
- Delete Access Rights 63
- Authentication Schemes 64
- Authentication Modules 67
- Password Authentication 67
- Creating a Password 67
- Modifying a Password 68
- Management Console 68
- User Console 69
- Configuring Passwords 69
- Configuring Answers 70
- Resource Management 72
- Executing a Resource 73
- The Barracuda SSL VPN Agent 74
- Web Forwarding! 76
- Technical Overview 77
- Tunnelled Web Forwards 77
- Reverse Proxy 78
- Web Forward Interface 78
- Creating a new Web Forward 79
- Authentication 80
- Editing a Web Forward 85
- Deleting a Web Forward 85
- Network Places 88
- Network Places Interface 89
- Creating a new Network Place 90
- File Management 93
- Editing a Network Place 94
- Deleting a Network Place 94
- Web Folders Windows Access 94
- Applications 101
- Publish a new Application 102
- General Tab 102
- Display Tab 103
- Mouse Tab 103
- Protocol Tab 103
- Advanced Tab 103
- Edit an Existing Application 104
- Removing an Application 104
- SSL Tunnels 105
- Edit an existing SSL Tunnel 108
- Removing an SSL Tunnel 108
- Profiles 110
- Action Icons 111
- Creating a new Profile 111
- Editing Profile Parameters 112
- Editing Session Details 113
- System Functions 116
- Auditing 116
- Creating a New Report 117
- Running One-Off Reports 119
- Appendix A 122
- Regular Expressions 122
- Examples 123
- Appendix B 124
- Limited Warranty and License 124
- Software License 125
- Appendix C 130
- Compliance 130
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