Unable to anonymize / mask data using regex

[zerolife]

I'm trying to mask the IP address from the below sample syslog per the following guide but it's just not working. Is my regex expression wrong? I'm no regex guru so I'm generating the regex expression from online tools.
http://docs.splunk.com/Documentation/Splunk/6.0.2/Data/Anonymizedatausingconfigurationfiles

Sample Log:
Apr 11 10:47:30 192.168.1.1 stingray_xml_slave: ....

pref.conf:

[syslog]
TRANSFORMS-anonymize = testing

transforms.conf:

[testing]
REGEX = \b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b
FORMAT = $1#####$2
DEST_KEY = _raw

I also tried the following Regex expresion generated by txt2re.com with no luck either:

((?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?))(?![\\d])

[zerolife]

I was an idiot, had mistyped props -> pref. thanks somesoni2 and Ayn for your help

[Ayn]

Any particular reason why you're using TRANSFORMS for this and not SEDCMD?

Also I'm assuming "pref.conf" is a typo?

...and finally where are you implementing this, on an indexer?

[somesoni2 · Accepted solution]

Try this.

props.conf

[syslog]
SEDCMD-ipaddress = s/\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/xxxxx/g

no transforms.conf entries.

[zerolife]

thanks for the try. However I rebooted Splunk and it's still not masking incoming syslog