Test of proxy protocols from our server
The tool checks the specified host and port from the perspective of our server. Tests the response against popular proxy protocols: HTTP proxy, CONNECT, SOCKS4 and SOCKS5. This is not a complete analysis of anonymity or a complete classification of each proxy.
Check the host and port response
Enter the domain or IP address and port. The tool will make a real connection attempt from our server and check whether the response matches HTTP proxy, CONNECT, SOCKS4 or SOCKS5.
How this verification works
Unlike simple hostname-only heuristics, this version tries to establish a connection to a specific `host:port` and send several different handshakes used by the most common proxy types.
First, a regular TCP connection is tested. If the port responds, the tool sends an HTTP request with the absolute URL, a CONNECT attempt, a SOCKS4 handshake, and a SOCKS5 negotiation.
The "Working proxy detected" status means that the server responded as an open proxy in one of the tested protocols. The "Suspicious Proxy Signs" status means that proxy signals are visible, but without hard confirmation. The lack of confirmation does not provide a 100% guarantee, because some servers require authorization, limit access via IP or filter test requests.