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#2 Modify DNS servers
You may try to change the original DNS servers in your network adapter. To do this, open the "Network and Sharing Center", right-click with the mouse on the active Internet connection and select "Properties", then select "Internet Protocol Version 4 (TCP/IPv4)", click on "Properties", enable the option "Use the following DNS server addresses", now type 18.104.22.168 in "Preferred DNS server" editbox, and 22.214.171.124 in "Alternate DNS server" editbox, finally click on "OK" button. Read more on using Google Public DNS.
How to change DNS servers on Windows →
#3 Reset proxy settings
Is possible that in some cases you cannot access allpornmodels.com because a web toolbar or a spyware has modified your web browser's proxy settings. So you may try to reset the web browser's proxy and then you may try to access again the website to see if it works fine. Generally the proxy settings are located in the web browser's options page under the section "Advanced" -> "Network" or "Connections" -> "LAN Settings". Make sure to enable the option "No proxy" or however untick the option that uses a proxy.
How to reset proxy settings of web browsers →
#4 Try other web proxies
Find other anonymous and free web proxies →
#5 Get a fast VPN service
If you are still not able to access allpornmodels.com, then you may need to buy a reliable and fast VPN service. For your information, a VPN is the best service to stay anonymous online and hide the IP address online. Yes, it costs few bucks per month, but in return you get total online anonymity and you can access any website from any device. VPN is much better than a free web proxy, and it works with any website. Looking for a good VPN ? Stop searching for it, check this page: Best VPN provider of 2015 →