or more selective and verbosely too, as found in 'Mastering Regualr Expressions': 

^([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\
+d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])$

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L*
There are no rules, there are no thumbs..
Reinvent the wheel, then learn The Wheel; may be one day you reinvent one of THE WHEELS.

In reply to Re^2: Seeker of Regex Wisdom (strings which don't form specific patterns) by Discipulus
in thread Seeker of Regex Wisdom (strings which don't form specific patterns) by ilcylic

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