regular expression to detect ipv4 IP address

Brian Julin BJulin at
Thu Sep 1 17:40:16 CEST 2016

Alex Sharaz <alex.sharaz at> wrote:

>> ipv4_regexp = '^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$'
>> but am getting

>> Thu Sep  1 16:22:35 2016 : Error:
>> /etc/freeradius/policy.d/canonicalization[95]: Invalid regular
>> expression:

Either check into whether FR is configured to use pcre expressions,
or write it out longhand.  The latter is probably the faster resolution.

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