List of TCP and UDP default ports commonly used in Azure Cloud Services
| Port | Description |
| 20/21 TCP | FTP (FILE DATA TRANSFER Data transfer/Command control |
| 22 TCP | SSH (Secure Shell) |
| 23 TCP | TELNET (Remote login Service) |
| 25 TCP | SMTP (Simple mail transfer Protocol) |
| 53 UDP/TCP | DNS (Domain Name Service) |
| 67/68 UDP | DHCP (Dynamic Host Configuration Protocol) |
| 80 TCP | HTTP (Hypertext Transfer Protocol) |
| 110 TCP | POP3 (Post Office Protocol) |
| 123 UDP | NTP (Network Time Protocol) |
| 143 TCP | IMAP (Internet Message Access Protocol) |
| 443 TCP | HTTPS (HTTP Secure) |
| 3389 TCP | RDP (remote desktop service) |
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