i have a secured wifi connection...some sites are blocked by the provider..how can i browse those sites???
anyone please suggest me some solutions..

Security restrictions are usually put in for a reason. If you really need access to those locations, talk to your provider about your need.

If you're paying them money, and hint you may take your business elsewhere they might relax those. At the very least you can find out WHY they are blocked.

If your "Provider" is your employer, then they have a really good reason to block those sites. They have determined that they have no business value. If you feel other wise, make a business case showing it.