Regular Expressions 101

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Regular Expression
ECMAScript (JavaScript)

/
^(25[0-5]|2[0-4][0-9]|1?[1-9]?[0-9])\.(25[0-5]|2[0-4][0-9]|1?[1-9]?[0-9])\.(25[0-5]|2[0-4][0-9]|1?[1-9]?[0-9])\.(25[0-5]|2[0-4][0-9]|1?[1-9]?[0-9])$
/
gm
Open regex in editor

Description

An IPv4 expression that doesn't allow leading zeros in octets. 10.0.0.1 will pass 10.0.0.01 shouldn't pass

Submitted by machfist - 18 days ago