fix: Prevent iptable list cmd to do reverse dns lookup (#2682)

fix: While listing iptable rules added -n option to prevent reverse dns lookup

Author: tamilmani1989

iptables/iptables.go

@@ -118,7 +118,7 @@ func (c *Client) RunCmd(version, params string) error {
 
 // check if iptable chain alreay exists
 func (c *Client) ChainExists(version, tableName, chainName string) bool {
-	params := fmt.Sprintf("-t %s -L %s", tableName, chainName)
+	params := fmt.Sprintf("-t %s -nL %s", tableName, chainName)
 	if err := c.RunCmd(version, params); err != nil {
 		return false
 	}