sourceIpRanges property
If not empty, this forwarding rule will only forward the traffic when the source IP address matches one of the IP addresses or CIDR ranges set here.
Note that a forwarding rule can only have up to 64 source IP ranges, and this field can only be used with a regional forwarding rule whose scheme is EXTERNAL. Each source_ip_range entry should be either an IP address (for example, 1.2.3.4) or a CIDR range (for example, 1.2.3.0/24).
Implementation
core.List<core.String>? sourceIpRanges;