Problem with proxy

[ZLoBNbIY]

Hello, there is a problem with the proxy. Up and running proxy to transparent mode, provided that enable traffic management stupidly falls Internet-like as is (pings go, online services work-Skype) and the sites are not loaded. Does anyone have any ideas about this?
P.S. Put a limit on the rate of only one customer that not to issue more than 1.5 meters per customer