The Social network Facebook supports both IPv4 and IPv6 proxies and that’s good news for those willing for scraping datas from Facebook without being banned. 

IPv6 proxies for Facebook sold by ColdProxy enable you to get billions of IPs instead of a small sequential IP adresses so that you can scrap as many datas as you want without being worried about Facebook bans.

You may be tempted to use free Facebook proxies to save some money.

There are free proxy services you can use for Facebook, however, free proxies do not guarantee good reliability. They may randomly getting offline and because they are free, they are used by a large number of users, which slows down the connection and slow down you in your tasks.

Another important point is that most free proxies are not HTTPS proxies, so you expose yourself to a high level of risk of being hacked.

Free proxy services earn money with advertising, so they can inject ads into the static HTML of the page via Javascript.

In the end, you have wasted time and money when you could have used a private and reliable blank proxy for only a few dollars

By purchasing IPv6 proxies you will be able to perform queries from a chosen geographical area, allowing you to see the specific content that the website displays for that particular location.

You will also be able to simulate a query from a specific device (mobile IPs for example), which allows you to see the specific content that the website displays for that specific device.

The major difference between a proxy server and a VPN is the encryption.

A proxy server will allow you to hide the real IP address of your computer. It's a bit like using someone else's computer to browse the web.

With a proxy server you can access Facebook if your company, school or even your country blocks access or you can unlock a banned Facebook account.
Although your own IP address is masked and protected, you are not browsing anonymously and that is the difference with a VPN.
When using a VPN (Virtual Private Network), your IP address is also hidden and replaced by another one, but the connexion to a web page is done through an encrypted tunnel which better protects your privacy.

Use a VPN and private proxies for Facebook simultaneously
For those who want to scrape Facebook, using a VPN and proxies at the same time is a guarantee to not be detected. For example, if one of your proxies is down while you are scraping web pages, your real IP address might be revealed, while, if you use a VPN simultaneously, it will take care of hiding your IP, even with if your proxy is getting down.
For maximum security and privacy, you can create a proxy chain. The proxy chain will allow you to structure the routes through which these packets of information pass.