// Create new chain if key: `chainTable` isn't present in map
		if !chainTableLookupSet.Contains(chainTable) {
			// Ignore chain creation for built-in chains for iptables
			if _, present := constants.BuiltInChainsMap[r.chain]; !present {
				cmd := []string{"-t", r.table, "-N", r.chain}
				output = append(output, cmd)
				chainTableLookupSet.Insert(chainTable)
			}
		}
	}
	for _, r := range rules {

	RAW    = "raw"
)

// Built-in iptables chains
const (
	INPUT       = "INPUT"
	OUTPUT      = "OUTPUT"
	FORWARD     = "FORWARD"
	PREROUTING  = "PREROUTING"
	POSTROUTING = "POSTROUTING"
)

var BuiltInChainsMap = map[string]struct{}{
	INPUT:       {},
	OUTPUT:      {},
	FORWARD:     {},
	PREROUTING:  {},
	POSTROUTING: {},
}

// Constants used for generating iptables commands
const (
	TCP = "tcp"