Match the regularity of the IP address
^ ([0-9] {1 rector 2} | 1 [0-9] {2} | 2 [0-4] [0-9] | 25 [0-5])\. ([0-9] {1]) 2} | 1 [0-9] {2} | 2 [0-4] [0-9] | 25 [0-5])\. ([0-9] {1] 2} | 1 [0-9] {2} | 2 [0-4] [0-9] | 25 [0-5])\. ] {1pm 2} | 1 [0-9] {2} | 2 [0-4] [0-9] | 25 [0-5]) $
