FTP - 20 & 21
SSH, SCP, SFTP - 22
Telnet - 23
SMTP - 25
TACACS - 49
DNS - 53
DHCP - 67 & 68
TFTP - 69
HTTP - 80
Kerberos - 88
POP3 - 110
NetBIOS - 137-139
IMAP4 - 143
SNMP - 161
LDAP - 389
SSL & HTTPS - 443
SMB - 445
LDAP with SSL - 636
FTPs - 989 & 990
Microsoft SQL Server - 1433
Layer 2 Tunneling Protocol (L2TP) - 1701
Point-to-Point Tunneling Protocol (PPTP) - 1723
RDP protocol and Terminal Services - 3389