Here's an example:Įither method returns a field called ipclass that contains the class portion of the IP address. You can use a forward slash ( / ), instead of quotation marks, to enclose the expression that contains a character class. You can escape the backslash character by adding another backslash, as shown in this example: You can specify the expression in one of two ways. The rex command performs field extractions using named groups in Perl regular expressions that you include in the search criteria. However, the expression uses the character class \d. You want to extract the IP class from the IP address. I want to extract the substring with 4 digits after two dots ,for the above example, it will be 'ab1d'. I can refer to host with same name 'host' in splunk query. In this example, the clientip field contains IP addresses. I have a field 'hostname' in splunk logs which is available in my event as 'host .com'. Regular expressions with character classes | rex field=ccnumber mode=sed "s/(\\d/XXXX-XXXX-XXXX-/g" 2. The \d must be escaped in the expression using a back slash ( \ ) character. In this example the first 3 sets of numbers for a credit card are masked. Use a to match the regex to a series of numbers and replace the numbers with an anonymized string to preserve privacy. To learn more about the rex command, see How the rex command works. Hi you please help me ? I really appreciate.Īug 11 03:31:05 134: Aug 10 17:31:04.The following are examples for using the SPL2 rex command. |table date host user command(enable) status(success) And get those results to a table look like I tried hard but could not find a query to merge all these data (indexes and hosts) to find out who ran enable command successfully at what time on which host. index=linux_logs host=gsw-03-tacacs enable* index=linux_logs host=edc-03-tacacs enable* I run the below 1,2,3 queries on the given datasets to find out which users ran the enable command on which host at what time: The reason is that when trying to eval a field based on a filed that doesn't exist in the data, the eval will fail and you'll end up with empty field. If you'll notice, I've added an if clause to the eval function. | eval "Hidden Cam Monitoring" = Date + " : " + hostname + " " + status + if(isnotnull(user)," "+user,"") Index=windows_log host=abc-05-hiddencam logged* This query captures the logg on and logg off status of the service. I have 2 separate queries that I built using Rex.ġ. I have another issue now, which I hope you would help me get solved. I now learnt how to build up regex queries on my own after your explanations and analysis of the queries you built for me, a huge thank you for that. Hi hope you are doing really well and thank you for helping me solve my previous issues.
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