Upstream filters (proto)
Upstream filters apply to the connections to the upstream cluster hosts.
config.cluster.v3.Filter
[config.cluster.v3.Filter proto]
{
  "name": ...,
  "typed_config": {...}
}
- name
- (string, REQUIRED) The name of the filter configuration. 
- typed_config
- (Any) Filter specific configuration which depends on the filter being instantiated. See the supported filters for further documentation. Note that Envoy’s downstream network filters are not valid upstream filters.