| Port | Protocol | Service | Description |
|---|---|---|---|
| 20 | TCP | FTP Data | File Transfer Data Channel |
| 21 | TCP | FTP | File Transfer Protocol |
| 22 | TCP | SSH | Secure Shell |
| 23 | TCP | Telnet | Remote Terminal |
| 25 | TCP | SMTP | Email Sending |
| 53 | TCP/UDP | DNS | Domain Name Service |
| 67 | UDP | DHCP | DHCP Server |
| 68 | UDP | DHCP | DHCP Client |
| 80 | TCP | HTTP | Web Traffic |
| 110 | TCP | POP3 | Email Retrieval |
| 123 | UDP | NTP | Time Synchronization |
| 143 | TCP | IMAP | Email Retrieval |
| 161 | UDP | SNMP | Monitoring |
| 162 | UDP | SNMP Trap | Monitoring Alerts |
| 389 | TCP/UDP | LDAP | Directory Services |
| 443 | TCP | HTTPS | Secure Web Traffic |
| 445 | TCP | SMB | Windows File Sharing |
| 465 | TCP | SMTPS | Secure SMTP |
| 514 | UDP | Syslog | Log Collection |
| 587 | TCP | SMTP Submission | Email Relay |
| 636 | TCP | LDAPS | Secure LDAP |
| 993 | TCP | IMAPS | Secure IMAP |
| 995 | TCP | POP3S | Secure POP3 |
| 1433 | TCP | MSSQL | Microsoft SQL Server |
| 1521 | TCP | Oracle DB | Oracle Database |
| 2049 | TCP | NFS | Linux File Sharing |
| 3306 | TCP | MySQL | MySQL Database |
| 3389 | TCP | RDP | Remote Desktop |
| 5060 | UDP | SIP | VoIP Signaling |
| 5061 | TCP | SIP TLS | Secure VoIP |
| 5432 | TCP | PostgreSQL | Postgres Database |
| 5900 | TCP | VNC | Remote Desktop |
| 6379 | TCP | Redis | In-memory Database |
| 8080 | TCP | HTTP Alternate | Web Applications |
| 8443 | TCP | HTTPS Alternate | Secure Web Services |
| 9200 | TCP | Elasticsearch | Search Engine |
| 9300 | TCP | Elasticsearch Cluster | Node Communication |
| 10050 | TCP | Zabbix Agent | Monitoring |
| 10051 | TCP | Zabbix Server | Monitoring |