Common service port number

DHCP udp67/68
DNS udp/tcp53
Telnet TCP23
HTTP TCP80
HTTPS tcp/udp443
Samba udp137/138 TCP139 TCP 445
FTP TCP20/21
SSH TCP22
Note:
The following ports are commonly used by proxy servers:
(1). HTTP protocol Proxy Server common port number: 80/8080/3128/8081/9080
(2). Socks Proxy Protocol Server common port number: 1080
(3). FTP (File Transfer) protocol Proxy Server Common port number: 21
(4). Telnet (remote login) protocol proxy Server common port: 23

HTTP server, the default port number is 80/tcp (Trojan executor open this port);
HTTPS (securely transferring Web pages) server, the default port number is 443/TCP 443/udp;
Telnet (unsafe text transfer), the default port number is 23/tcp (Trojan tiny Telnet server open ports);
FTP, the default port number is 21/tcp (Trojan doly Trojan, Fore, Invisible FTP, WebEx, Wincrash, and Blade Runner open ports);
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;
Tomcat, the default port number is 8080;
WIN2003 remote login, the default port number is 3389;
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;
QQ, the default port number is 1080/UDP

Common service port numbers