How to find control string of specific site?

[kingston123]

I am using proxy checker tool to scan my bulk proxies on specific site.

But it is popping up to enter the control string of the specific site.

 

[proxygo]

you could have just placed all your questions in 1 thread
not 4-5 different one

 

[kingston123]

you could have just placed all your questions in 1 thread
not 4-5 different one

I will wait for more suitable reply.