<%NUMBERING1%>.<%NUMBERING2%>.<%NUMBERING3%> PRTG Manual: Regular Expressions

For some sensors (for example, some HTTP sensors and email sensors), you can use regular expressions to match a search pattern. PRTG suppors PCRE-RegEx. Please see below for examples with the most common patterns.

Common Search Patterns

Find matches containing the word error or alarm:

\b(error|alarm)\b

 

Find matches containing the words error and alarm in any order:

(?=.*\berror\b)(?=.*\balarm\b).*

 

Find matches containing all of the words tree, flower, leaf, and bug, in any order:

(?=.*\btree\b)(?=.*\bflower\b)(?=.*\bleaf\b)(?=.*\bbug\b).*

 
It is not possible to match an empty string using the PRTG regex search with sensors.

Example

The search pattern

(?=.*\berror\b)(?=.*\balarm\b).*

will match the following expressions:

• alarm error
• error alarm
• I am an error and I evoke an alarm
• I am an alarm and I indicate an error
• An alarm combined with an error indeed!
• An error combined with an alarm, too!

More

Regex Tester: Test Regular expressions interactively

• http://regexpal.com

Wikipedia: Regular expression

• http://en.wikipedia.org/wiki/Regular_expression

 

Advanced Topics

• Active Directory Integration
• Application Programming Interface (API) Definition
• Filter Rules for xFlow, IPFIX, and Packet Sniffer Sensors
• Channel Definitions for xFlow, IPFIX, and Packet Sniffer Sensors
• Define IP Ranges
• Define Lookups
• Regular Expressions
• Add Remote Probe
• Failover Cluster Configuration
• Data Storage
• Using Your Own SSL Certificate
• Calculating Percentiles