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Building a data science portfolio: Machine learning project
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增强你的数据科学方面的综合能力：机器学习项目
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===========================================================
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>这是这个系列的第三次发布关于如何建立科学的投资数据. 如果你喜欢这个系列并且想继续关注, 你可以在订阅页面的底部找到链接[subscribe at the bottom of the page][1].
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> 这是[这个系列][3]发布的第三篇关于如何取得数据科学方面的综合能力（Data Science Portfolio）的文章。如果你喜欢这个系列并且想继续关注，你可以在订阅页面的底部找到[链接][1]。
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数据科学公司越来越关注投资组合问题. 这其中的一个原因是，投资组合是最好的判断人们生活技能的方法. 好消息是投资组合是完全在你的控制之下的. 只要你做些投资方面的工作，就可以做出很棒的投资组合.
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数据科学公司在决定雇佣时越来越关注你在数据科学方面的综合能力（Portfolio）。这其中的一个原因是，这样的综合能力是最好的判断某人的实际技能的方法。好消息是取得这样的综合能力完全要看你自己。只要你在这方面付出了努力，你一定可以取得让这些公司钦佩的综合能力。
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高质量投资组合的第一步就是知道需要什么技能. 客户想要将这些初级技能应用到数据科学, 因此这些投资技能显示如下:
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取得高质量的综合能力的第一步就是知道需要什么技能。公司想要在数据科学方面拥有的、他们希望你能够运用的主要技能有：
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- 沟通能力
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- 协作能力
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- 技术能力
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- 数据推理能力
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- 主动性
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- 动机和主动性
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任何好的投资组合都由多个能力组成，其中必然包含以上一到两点. 这里我们主要讲第三点如何做好科学的数据投资组合. 在这一节, 我们主要讲第二项以及如何创建一个端对端的机器学习项目. 在最后, 在最后我们将拥有一个项目它将显示你的能力和技术水平. [Here’s][2]如果你想看一下这里有一个完整的例子.
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任何好的综合能力都由多个项目表现出来，其中每个都能够表现出以上一到两点。这是本系列的第三篇，我们主要讲包括如何打造面面俱到的数据科学方面的综合能力。在这一篇中，我们主要包括如何构建组成你的综合能力的第二个项目，以及如何创建一个端对端的机器学习项目。在最后，我们将拥有一个展示你的数据推理能力和技术能力的项目。如果你想看一下的话，[这里][2]有一个完整的例子。
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### 一个端到端的项目
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作为一个数据科学家, 有时候你会拿到一个数据集并被问到是 [如何产生的][3]. 在这个时候, 交流是非常重要的, 走一遍流程. 用用Jupyter notebook, 看一看以前的例子，这对你非常有帮助. 在这里你能找到一些可以用的报告或者文档.
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作为一个数据科学家，有时候你会拿到一个数据集并被问到是 [如何产生的][3]. 在这个时候, 交流是非常重要的, 走一遍流程. 用用Jupyter notebook, 看一看以前的例子，这对你非常有帮助. 在这里你能找到一些可以用的报告或者文档.
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不管怎样, 有时候你会被要求创建一个具有操作价值的项目. 一个直接影响公司业务的项目, 不止一次的, 许多人用的项目. 这个任务可能像这样 “创建一个算法来预测波动率”或者 “创建一个模型来自动标签我们的文章”. 在这种情况下, 技术能力比说评书更重要. 你必须能够创建一个数据集, 并且理解它, 然后创建脚本处理该数据. 还有很重要的脚本要运行的很快, 占用系统资源很小. 它可能要运行很多次, 脚本的可使用性也很重要，并不仅仅是一个演示版. 可使用性是指整合操作流程, 因为他很有可能是面向用户的.
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How to Setup Pfsense Firewall and Basic Configuration
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================================================================================
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In this article our focus is Pfsense setup, basic configuration and overview of features available in the security distribution of FreeBSD. In this tutorial we will run network wizard for basic setting of firewall and detailed overview of services. After the [installation process][1] following snapshot shows the IP addresses of WAN/LAN and different options for the management of Pfsense firewall.
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After setup , following window appear which shows the url for configuration of Pfsense.
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Open above given URL in the browser and login with username **admin** and password **pfsense**
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After successful login, following wizard appears for the basic setting of Pfsense firewall. However setup wizard option can be bypassed and user can run it from the **System** menu from the web interface.
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Click on the **Next** button to start basic configuration process on Pfsense firewall.
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Setting hostname, domain and DNS addresses is shown in the following figure.
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Setting time zone is shown in the below given snapshot.
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Next window shows setting for the WAN interface. By defaults Pfsense firewall block bogus and private networks.
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Setting LAN IP address which is used to access the Pfsense web interface for further configuration.
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By default password for web interface is "pfsense". Enter new password for admin user on the following window to access the web interface for further configuration.
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Click on the "reload" button which is shown below. It applies the setting and redirect firewall user to main dashboard of Pfsense.
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 and status of ethernet/wireless interfaces etc.
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### Menu detail ###
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PFsense consist of System, interfaces, firewall,services,vpn,status,diagnostics and help menus.
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### System Menu ###
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Sub menus of **System** is given below.
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In the **Advanced** sub menu user can perform following operations.
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1. Configuration of web interface
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1. Firewall/Nat setting
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1. Networking setting
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1. System tuneables setting
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1. Notification setting
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In the **Cert manager** sub menu, firewall administrator generates certificates for CA and users.
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In the **Firmware** sub menu, user can update Pfsense firmware manually/automatically. User can take full backup of Pfsense configurations.
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In the **General Setup** sub menu, user can change basic setting such as hostname and domain etc.
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As menu title indicates, user can enable/disable high availability feature from this sub menu.
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Packages sub menu provides package manager facility in the web interface for Pfsense .
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User can perform gateway and route management using **Routing** sub menu.
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**Setup Wizard** sub menu opens following window which start basic configuration of Pfsense.
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Management of user can be done from the **User manager** sub menu.
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### Interfaces Menu ###
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This menu is used for the assignment of interfaces (LAN/WAN), VLAN setting,wireless and GRE configuration etc.
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### Firewall Menu ###
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Firewall is the main and core part of Pfsense distribution and it provides following features.
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**Aliases**
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Aliases are defined for real hosts, networks or ports and they can be used to minimize the number of changes.
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**NAT (Network Address Translation)**
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NAT binds a specific internal address to a specific external address. Incoming traffic from the Internet to the specified IP will be directed toward the associated internal IP.
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**Firewall Rules**
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Firewall rules control what traffic is allowed to enter an interface on the firewall. After traffic is passed on the interface, it enters an entry in the state table is created.
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**Schedules**
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Firewall rules can be scheduled so that they are only active at certain times of day or on certain specific days or days of the week.
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**Traffic Shaper**
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Traffic shaping is the control of computer network traffic in order to optimize performance and lower latency.
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**Virtual IPs**
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Virtual IPs add knowledge of additional IP addresses to the firewall that are different from the firewall's real interface addresses.
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### Services Menu ###
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Services menu shows services which are provided by the Pfsense distribution along firewall.
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New program/software installed for some specific service is also shown in this menu such as snort. By default following services are listed in services menu.
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**Captive portal**
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The captive portal functionality in Pfsense allows securing a network by requiring a username and password entered on a portal page.
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**DHCP Relay**
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The DHCP Relay daemon will relay DHCP requests between broadcast domains for IPv4 DHCP.
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**DHCP Server**
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User can run DHCP service on the firewall for the network devices.
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**DNS Forwarder/Resolver/Dynamic DNS**
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DNS different services can be configured on the Pfsense firewall.
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**IGMP Proxy**
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User can configure IGMP on the Pfsense firewall from services menu.
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**Load Balancer**
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Load Balancing is one of the important feature which is also supported by the Pfsense firewall.
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**SNMP (Simple Network Management Protocol)**
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Pfsense supports all versions of snmp for remote management of firewall.
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**Wake on Lan**
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Using this feature packet sent to a workstation on a locally connected network which will power on a workstation.
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### VPN Menu ###
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It is one of the most important feature of Pfsense. Its supports following types of vpn configuration.
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**VPN IPsec**
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IPsec is a standard for providing security to IP protocols via encryption and/or authentication.
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**L2TP IPsec**
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L2TP/IPsec is a common VPN type that wraps L2TP, an insecure tunneling protocol, inside a secure channel built using transport mode IPsec.
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**OpenVPN**
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OpenVPN is an Open Source VPN server and client that is supported on pfSense.
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**Status Menu**
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It shows the status of services provided by Pfsense such as dhcp server, ipsec and load balancer etc.
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**Diagnostic Menu**
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This menu helps administrator/user for the rectification of Pfsense issues or problems.
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**Help Menu**
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This menu provides links for different useful resources such as FreeBSD handbook,developer wiki, paid support and pfsense book.
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### Conclusion ###
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In this article our focus was on the basic configuration and features set of Pfsense distribution. It is based on FreeBSD distribution and widely used due to security and stability features. In our future articles on Pfsense, our focus will be on the basic firewall rules setting, snort (IDS/IPS) and IPSEC VPN configuration.
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--------------------------------------------------------------------------------
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via: http://linoxide.com/firewall/pfsense-setup-basic-configuration/
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作者：[nido][a]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]:http://linoxide.com/author/naveeda/
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[1]:http://linoxide.com/firewall/install-pfsense-firewall/
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