How scan proxy safety before use so as not to Achtrack

Because of the prohibition of State and sites for users, some people resort to the use of free proxy as a means to overcome the ban sites.
As some use of proxies knows this may constitute a threat to the safety of your data, especially that part of these proxies Alhecrz subtracted from the party in order to spy on computers. The so-called attack MAN In The Middle Attack in the subject site PRoxy Check which serves to check the safety of its use of proxy before you suggest.
Modern enough that you place the proxy to be examined with the port in the Proxy IP box and Port. Flag on i'am not a boot and click on Analyze in the case if you see any warning as shown in the picture that Vlaztaml proxy for your safety of hack.