Through this tool, you can scan whether common ports and specified ports are open.
Common port numbers:
Proxy servers commonly use the following ports:
1. Common port numbers of HTTP protocol proxy servers: 80/8080/3128/8081/9080
2. Common port number of SOCKS proxy protocol server: 1080
3. Common port number of FTP (file transfer) protocol proxy server: 21
4. Telnet (remote login) protocol proxy server common port: 23
HTTP server, the default port number is 80/tcp (Trojan Executor opens this port);
HTTPS (securely transferring web pages) server, the default port number is 443/tcp 443/udp;
Telnet (insecure text transfer), the default port number is 23/tcp (the port opened by the Trojan Tiny Telnet Server);
FTP, the default port number is 21/tcp (the port opened by the Trojans Doly Trojan, Fore, Invisible FTP, WebEx, WinCrash and Blade Runner);
TFTP (Trivial File Transfer Protocol), the default port number is 69/udp;
SSH (secure login), SCP (file transfer), port redirection, the default port number is 22/tcp;
SMTP Simple Mail Transfer Protocol (E-mail), the default port number is 25/tcp (Trojan Antigen, Email Password Sender, Haebu Coceda, Shtrilitz Stealth, WinPC, WinSpy all open this port);
POP3 Post Office Protocol (E-mail), the default port number is 110/tcp;
WebLogic, the default port number is 7001;
WebSphere application, the default port number is 9080;
WebSphere management tool, the default port number is 9090;
JBOSS, the default port number is 8080;
TOMCAT, the default port number is 8080;
WIN2003 remote login, the default port number is 3389;
Symantec AV/Filter for MSE, the default port number is 8081;
Oracle database, the default port number is 1521;
ORACLE EMCTL, the default port number is 1158;
Oracle XDB (XML database), the default port number is 8080;
Oracle XDB FTP service, the default port number is 2100;
MS SQL*SERVER database server, the default port number is 1433/tcp 1433/udp;
MS SQL*SERVER database monitor, the default port number is 1434/tcp 1434/udp;
QQ, the default port number is 1080/udp