netutil

func MaskIP ¶

func MaskIP(ip net.IP) net.IP

MaskIP returns a masked version of the IP address for grouping purposes. IPv4 addresses are masked to /24 (zeroing the last octet). IPv6 addresses are masked to /48.

This is useful for rate limiting and freebie tracking where we want to group requests from the same network segment rather than individual IPs, reducing abuse potential from users with multiple addresses.