Question

I have the following string:

DNS Servers . . . . . . . . . . . : 10.204.127.11
                                    10.207.2.50
                                    10.200.10.6

I’m trying to build a RegEx to parse out N number of IP addresses.

I understand there is an allegedly duplicate post here, but it is not working with the following RegEx:
http://regexr.com?321nu

^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$

p.s. sorry, a colleague of mine started this post on my account for me while I was away. I suppose I’ve added more information here. Feel free to unbury me.

Answer 1

How about ([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+) ?

As some numbers should not be allowed, better but not perfect pattern would be:

(1[0-9]{0,2}|2[0-9]{0,1}|2[0-4][0-9]|25[0-5]|[3-9][0-9]?)(\.(0|1[0-9]{0,2}|2[0-9]{0,1}|2[0-4][0-9]|25[0-5]|[3-9][0-9]?)){3}