return fc.GetDestinationPort() == nil
	}, func(fc *listener.FilterChainMatch) bool {
		return int(fc.GetDestinationPort().GetValue()) == input.Port
	})
	chains = filter("PrefixRanges", chains, func(fc *listener.FilterChainMatch) bool {
		return fc.GetPrefixRanges() == nil
	}, func(fc *listener.FilterChainMatch) bool {
		ranger := cidranger.NewPCTrieRanger()
		for _, a := range fc.GetPrefixRanges() {