| 20 | TCP | FTP Data Transfer | FTP |
| 21 | TCP | FTP Command Control | FTP |
| 22 | TCP/UDP | Secure Shell (SSH) | SSH |
| 23 | TCP | Telnet | Telnet |
| 25 | TCP | Simple Mail Transfer Protocol (SMTP) | SMTP |
| 53 | TCP/UDP | Domain Name System (DNS) | DNS |
| 67 | UDP | DHCP Server | DHCP |
| 68 | UDP | DHCP Client | DHCP |
| 69 | UDP | Trivial File Transfer Protocol (TFTP) | TFTP |
| 80 | TCP | Hypertext Transfer Protocol (HTTP) | HTTP |
| 110 | TCP | Post Office Protocol v3 (POP3) | POP3 |
| 119 | TCP | Network News Transfer Protocol (NNTP) | NNTP |
| 123 | UDP | Network Time Protocol (NTP) | NTP |
| 143 | TCP | Internet Message Access Protocol (IMAP) | IMAP |
| 161 | UDP | Simple Network Management Protocol (SNMP) | SNMP |
| 162 | UDP | SNMP Trap | SNMP |
| 389 | TCP/UDP | Lightweight Directory Access Protocol (LDAP) | LDAP |
| 443 | TCP | HTTP Secure (HTTPS) | HTTPS |
| 445 | TCP | Microsoft-DS (Active Directory, SMB) | SMB |
| 465 | TCP | SMTP over SSL | SMTPS |
| 514 | UDP | Syslog | Syslog |
| 587 | TCP | SMTP (Mail Submission) | SMTP |
| 631 | TCP/UDP | Internet Printing Protocol (IPP) | IPP |
| 636 | TCP/UDP | LDAP over SSL | LDAPS |
| 993 | TCP | IMAP over SSL | IMAPS |
| 995 | TCP | POP3 over SSL | POP3S |
| 1080 | TCP | SOCKS Proxy | SOCKS |
| 1194 | UDP | OpenVPN | OpenVPN |
| 1433 | TCP | Microsoft SQL Server | SQL Server |
| 1434 | UDP | Microsoft SQL Server | SQL Server |
| 1521 | TCP | Oracle Database | Oracle DB |
| 2049 | TCP/UDP | Network File System (NFS) | NFS |
| 2082 | TCP | cPanel HTTP | cPanel |
| 2083 | TCP | cPanel HTTPS | cPanel |
| 2086 | TCP | WHM HTTP | WHM |
| 2087 | TCP | WHM HTTPS | WHM |
| 2181 | TCP | Apache ZooKeeper | ZooKeeper |
| 3306 | TCP | MySQL Database | MySQL |
| 3389 | TCP | Remote Desktop Protocol (RDP) | RDP |
| 3690 | TCP | Subversion | SVN |
| 4369 | TCP | Erlang Port Mapper Daemon (EPMD) | EPMD |
| 5000 | TCP | Flask Development Server | Flask |
| 5432 | TCP | PostgreSQL Database | PostgreSQL |
| 5672 | TCP | AMQP | RabbitMQ |
| 5900 | TCP | Virtual Network Computing (VNC) | VNC |
| 6379 | TCP | Redis | Redis |
| 6667 | TCP | Internet Relay Chat (IRC) | IRC |
| 8000 | TCP | HTTP Alternate | HTTP |
| 8080 | TCP | HTTP Proxy | HTTP Proxy |
| 8443 | TCP | HTTPS Alternate | HTTPS |
| 8888 | TCP | HTTP Alternate | HTTP |
| 9000 | TCP | SonarQube | SonarQube |
| 9092 | TCP | Apache Kafka | Kafka |
| 9418 | TCP | Git | Git |
| 9999 | TCP | Java Debug Wire Protocol (JDWP) | JDWP |
| 10000 | TCP | Webmin | Webmin |
| 11211 | TCP/UDP | Memcached | Memcached |
| 27017 | TCP | MongoDB | MongoDB |
| 27018 | TCP | MongoDB | MongoDB |
| 27019 | TCP | MongoDB | MongoDB |
| 28017 | TCP | MongoDB Web Interface | |