Format: ip:port:protocol

Available protocol: 'http', 'socks4', 'socks5'. Default protocol is 'http'.

Example:

211.23.21.23:80:http

Note:

Country = "-" : The IP address is not in our ip2country database.
Country = "--": The proxy server's inbound IP address is not identical to the outbound IP address. The proxy server might belong to some proxy networks such as CoDeen