FTP
20, 21
SSH
22
SFTP
SCP
Telnet
23
SMTP
25
TACACS
49
DNS
53
DHCP
67, 68
TFTP
69
HTTP
80
HTTPS
443
SSL VPN
Kerberos
88
POP3
110
NNTP
119
IMAP4
143
SNMP
161
SNMP Trap
162
LDAP
389
ISAKMP
500
Syslog
514
L2TP
1701
PPTP
1723
RDP
3389