Check proxy(including: http, https,ftp, socks4, socks5 proxy) and show their speed, derive proxy from webs or any other local files, scan proxy in a special Ip and port range, set and remove IE proxy conveniently, hav easy-to-use interface.
1st Net Scanner is a useful IP Finder and Port Finder. It builds IP finder, port finder, IP scanner, port scanner and IP tracer in one software. It can scan IP address and trace IP address. And it also can find port, search port and scan port.