Online Port Scanner
Test TCP ports on any host or proxy server. Check if ports are open, measure latency, and verify proxy server reachability. Runs server-side — your IP stays private.
Presets:
Need proxies on specific ports?
v-proxies supports HTTP, HTTPS, SOCKS4, and SOCKS5 · Custom port routing available
Common Proxy Server Ports
3128Squid Proxy
Default HTTP proxy port for the Squid cache server.
8080HTTP Proxy
Common alternative HTTP proxy port. Also used by web servers and APIs.
1080SOCKS
Default port for SOCKS4 and SOCKS5 proxy servers.
8888HTTP Proxy
Another common alternative proxy port, often used by commercial providers.
443HTTPS / SSL
HTTPS traffic. Many proxies use this to blend in with normal traffic.
9090HTTP Proxy
Used by some proxy gateway software and management interfaces.
Frequently Asked Questions
What is a port scanner?›
A port scanner tests whether TCP ports on a remote host are open (accepting connections) or closed (refusing or not responding). It works by attempting a TCP connection to each port and measuring the response.
Why would a proxy port show as closed?›
The proxy port may be blocked by a firewall, the proxy service may be offline, or the host may be dropping packets silently. Increase the timeout to rule out slow responses before declaring a port closed.
What is the difference between open, closed, and filtered ports?›
Open means the port accepted the connection — a service is listening. Closed means the host actively refused the connection. Filtered means no response was received within the timeout — typically because a firewall is dropping packets.
Can I scan port ranges?›
Yes. Enter port ranges like "8080-8090" in addition to individual ports. The tool supports up to 50 ports per scan.
Is this tool scanning from my IP?›
No. The scan runs entirely server-side from our infrastructure. The target host sees connections from our server's IP, not yours. This also means the results reflect real-world external connectivity to the target.
Are private IP addresses blocked?›
Yes. Scanning of localhost, 10.x.x.x, 192.168.x.x, 172.16-31.x.x, and other private ranges is blocked to prevent misuse.