Simple Mail Transfer Protocol (SMTP)
25
110
12
26
Simple Mail Transfer Protocol with Transport Layer Security (SMTP/TLS)
587
995
445
389
Post Office Protocol version 3 (POP3)
67
80
Post Office Protocol version 3 over Secure Socket Layer (POP3S)
1433
1521
Internet Message Access Protocol (IMAP)
143
161
Internet Message Access Protocol over Secure Socket Layer (IMAPS)
993
1033
1215
File Transfer Protocol (FTP) - Data
20
21
22
23
File Transfer Protocol (FTP) - Commands
Secure File Transfer Protocol (SFTP)
69
53
Trivial File Transfer Protocol (TFTP)
70
72
Server Message Block (SMB)
636
514
Domain Name System (DNS)
47
57
Dynamic Host Configuration Protocol (DHCP) - Client (receive)
65
66
68
Dynamic Host Configuration Protocol (DHCP) - Server (send)
Network Time Protocol (NTP)
162
153
123
Simple Network Management Protocol (SNMP) - Agent (responds to SNMP queries)
192
Simple Network Management Protocol (SNMP) - Manager (sends SNMP queries)
Lightweight Directory Access Protocol (LDAP)
42
443
Lightweight Directory Access Protocol over Secure Socket Layer (LDAPS)
3306
Syslog
Session Initiation Protocol (SIP) - Unencrypted
5061
5060
Session Initiation Protocol (SIP) - Encrypted
4325
Secure Shell (SSH)
24
Telnet
100
78
14
Remote Desktop Protocol (RDP)
3389
SQL Server
686
SQLnet
MySQL
2078
4391
Hypertext Transfer Protocol (HTTP)
Hypertext Transfer Protocol over Secure Socket Layer/Transport Layer Security (HTTPS)