What does it mean to assemble an ARP firewall for a site?

What does it mean to install the ARP firewall for a site?
I just applied for a domain name, with the classmate's server, classmate said, your site: You must install an ARP firewall Ah!
What does it mean to install an ARP firewall for a site? How to install? I downloaded a color-shadow ARP firewall. And how do you do it?
My site is used by WordPress blog template, put two articles on the above, just start using, a lot of will not, such as how to add to Baidu (I am in search of Baidu published articles, received, students said is not included, how should I do?) He gave me a webmaster tools, I went to the webmaster's home, and then what needs to do? That is a website ah, can only query have been included! And how to add a site access statistic to my blog ... High score reward (only 60 points)! Welcome to the Exchange!
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ARP Firewall

This kind of thing sounds like something the server is doing, not a website.
If it is a Windows server, install a firewall with anti-virus software, or a free firewall, Linux will only open the necessary services
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1.arp firewall is something like anti-virus software, is a software that needs to be installed on the server.
2. Baidu does not need you set up, Baidu automatically will be included, but your website to be stable, can not often open.
3. Website statistics, you can go to www.cnzz.com to apply for an account, it will give you a piece of code, you add to your site on it.

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