This is basis tutorial let you know how to use private proxies.There are mainly 2 type authenticate private proxies methods.
1.USE “USERNAME AND PASSWORD” AUTHENTICATE PRIVATE PROXIES
If you use this type private proxies anonymous surf..browser should show you popup with login/password request.just fill in your proxy Username/Password. you can anonymous surf now.
If you use for Scrapebox Proxies.you should use as this format:
Private proxy format: IP:PORT:Username:Password
2.USE “IP AUTHENTICATION” AUTHENTICATE PRIVATE PROXIES
A lot of private proxy service providers use, “IP Authentication” to authorize your private proxy. If your proxy provider offers this feature,you don’t need Username/Password any more.
Step on setting up IP authentication on squidproxies.com
1. Login to the VIP control panel. Go to http://vip.squidproxies.com
2. Click “Authorized IPs”
3. Click “[Add to auth list]”
4.to add your IP and submit. Wait 5 mins for propagation.
5. Now you can start using the proxies listed under your “Private Proxies”
Authentication on buyproxies.com
After “IP Authentication”
If you use for Scrapebox Proxies.you should use as this format:
Private proxy format: IP:PORT
source:
http://www.privateproxyreviews.com/authorizeprivateproxy/