User's Guide
What It Is
What's New
Key Features List
ClearBox Enterprise vs ClearBox
System Requirements
Purchasing Licenses
Getting Started
Quick Start
Understanding Server Components
Managing User Accounts
Configuring RADIUS Realms
Realm Settings
Realm Rules
Dynamic Realm Rules
Authentication Protocols Compatibility
Logging Authentication Packets
Logging Discarded Requests
Account Log Files
Realm Settings
Configuring SQL Queries
Private RADIUS Attributes
Regular Expressions Syntax
RADIUS Clients
RADIUS Client Settings
Dynamic Clients Settings
SQL Data Sources
SQL Data Source Settings
LDAP Servers
LDAP Server Settings
Remote RADIUS Servers
Remote RADIUS Server Settings
State Servers
State Server Settings
Meta Configuration
Meta Configuration
Meta Configuration Settings
Meta Base Schema
TLS Settings
Creating SSL Certificates
Creating Server Sertificate
Requesting Server Certificate
Creating Client Certificates
Revoking a Certificate or Renewing CRL
Exporting CA Certificate
Issuing a Certificate in Active Directory CA
Remote Configuration
Advanced ISP Billing Integration
DTH Billing Integration
Platypus Billing System Intergration
OnDO SIP Server Integration
How Do I...
Wi-Fi Security
Wireless Authentication
Wi-Fi and RADIUS
Supported EAP Authentication Types
Security Considerations
10 Tips for Wireless Network Security
Administering the Server
Debug Logs
Using Client Tool
List of Server Errors
Maintaining RADIUS Dictionary
Basic Concepts
Wireless Authentication
Authentication Protocols
RADIUS Attributes
Example of RADIUS Packet Transactions
List of Standard RADIUS Attributes
Technical Support
Purchasing Licenses

ClearBox Enterprise Server 2.0 Online Manual
Prev Page Next Page
ClearBox Enterprise Serverâ„¢ 2.0. User's Guide

Regular Expressions Syntax

This table lists the metacharacters understood by ClearBox Server and which may be used in matching RADIUS attributes or in user name rewriting rules.

Metacharacter Meaning
. Matches any single character.
[ ] Indicates a character class. Matches any character inside the brackets (for example, [abc] matches "a", "b", and "c").
^ If this metacharacter occurs at the start of a character class, it negates the character class. A negated character class matches any character except those inside the brackets (for example, [^abc] matches all characters except "a", "b", and "c").

If ^ is at the beginning of the regular expression, it matches the beginning of the input (for example, ^[abc] will only match input that begins with "a", "b", or "c").

- In a character class, indicates a range of characters (for example, [0-9] matches any of the digits "0" through "9").
? Indicates that the preceding expression is optional: it matches once or not at all (for example, [0-9][0-9]? matches "2" and "12").
+ Indicates that the preceding expression matches one or more times (for example, [0-9]+ matches "1", "13", "789", and so on).
* Indicates that the preceding expression matches zero or more times.
??, +?, *? Non-greedy versions of ?, +, and *. These match as little as possible, unlike the greedy versions which match as much as possible. Example: given the input "<abc><def>", <.*?> matches "<abc>" while <.*> matches "<abc><def>".
( ) Grouping operator. Example: (\d+,)*\d+ matches a list of numbers separated by commas (such as "1" or "1,23,456").
{ } Indicates a match group. The actual text in the input that matches the expression inside the braces is placed in the ouput, i.e. in the rewritten user name.
\ Escape character: interpret the next character literally (for example, [0-9]+ matches one or more digits, but [0-9]\+ matches a digit followed by a plus character). Also used for abbreviations (such as \a for any alphanumeric character; see table below).

If \ is followed by a number n, it matches the nth match group (starting from 0). Example: <{.*?}>.*?</\0> matches "<head>Contents</head>".

$ At the end of a regular expression, this character matches the end of the input. Example: [0-9]$ matches a digit at the end of the input.
| Alternation operator: separates two expressions, exactly one of which matches (for example, T|the matches "The" or "the").
! Negation operator: the expression following ! does not match the input. Example: a!b matches "a" not followed by "b".


ClearBox can handle abbreviations, such as \d instead of [0-9]. The following abbreviations are supported:

Metacharacter Meaning
.\a Any alphanumeric character.
\b White space (blank).
\c Any alphabetic character.
\d Any decimal digit.
\h Any hexadecimal digit.
\n Newline.
\q A quoted string.
\w A simple word.
\z An integer.

© 2001-2007 XPerience Technologies.
Converted from CHM to HTML with chm2web Pro 2.7 (unicode)