"Users may not post from proxies, VPNs, or Tor exit nodes."— 4chan, rule number 14
Filter avoidance, also known as proxies, VPN, or simply known by many school/web filters as "Proxy Avoidance", is a form of Internet connectivity where the user first connects through a proxy server, which often times is through a webhost, and then browses the Internet from the proxy server, and from the ISP/firewall, the only thing seen is the webhost/proxy server itself, unable to see what the proxy server is doing. They are easily blocked by web/school filters, but some use a non-static URL name, which means even if that domain is blocked, it unblocks itself by changing the URL name regularly. Wikipedia is known to block and detect proxies by running a test where if its a proxy IF the IP address and port accepts the connection through it.
These are not only used by spambots to evade being detected, but also sockpuppets and trolls to evade IP bans. Usually on IPv6, it is harder to block IPv6 addresses because spoofing the MAC address can also change the IPv6 as each computer gets their own IPv6 address, opposed to a IPv4 address where every computer shares a web IPv4 address.
- Google Translate has its own web proxy, which if the user were to use "Spanish" to "English", it'll use its proxy to connect to a page. It is ineffective though, as the user can't log-in.
- There are PHP/Glype-dedicated proxy sites, such as ProxySite and others. Often times, they function as a "site-within-a-site", and sometimes load the site very poorly to be not as usable as a "personal VPN", such as NordVPN.
- Firefox was the only browser to have integrated proxy settings, which caused the trend of proxy server lists. Not only are these notoriously loaded by spambots who spider the site and take advantage of them, they are often times much slower.
- You can get a proxy switcher off of the Chrome web store, and VPN extensions which tend to be less loaded with spambots.
- Epic Browser's integrated proxy is a major example, being that it gives eight different regions and changing IPs.
- Similarly, Brave integrates Tor as a option and Opera has a slower but ineffective VPN. It should be noted that these will easily trigger "ipv4.google" errors, as they're often times loaded by spambots.
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