Matches only valid IPv4 addresses where each octet is in the 0–255 range. Out-of-range values like 999.1.1.1 are filtered out. Frequently used for log analysis and access-list processing.
Example Matches
192.168.0.1
8.8.8.8
255.255.255.0
Test String
Local 192.168.0.1, public DNS 8.8.8.8, invalid 999.1.1.1