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Microsoft SQL Server 1433
L2TP 1701
FTP - Data 20
FTP - Control 21
SSH (Secure Shell) 22
SFTP (Secure File Transport Protocol) - uses SSH 22
SCP (Secure Copy) - uses SSH 22
Telnet 23
SMTP (Simple Mail Transport Protocol) 25
TACACS (Terminal Access Controller Access-Control System) 49
DNS (Domain Name System) 53
DHCP (Dynamic Host Configuration Protocol) 67, 68
TFTP (Trivial File Transport Protocol) 69
HTTP (Hypertext Transfer Protocol) 80
HTTPS (Hypertext Transfer Protocol Secure) 443
SSL VPN - Secure Sockets Layer virtual private network 443
Kerberos 88
POP3 - Post Office Protocol version 3 110
NNTP (Network News Transfer Protocol) 119
IMAP4 (Internet Message Access Protocol version 4) 143
SNMP (Simple Network Management Protocol) 161
SNMPT (Simple Network Management Protocol Trap) 162
LDAP (Lightweight Directory Access Protocol) 389
ISAKMP (VPN) - (Internet Security Association and Key Management Protocol (virtual private network) 500
Syslog 514
L2TP (Layer 2 Tunneling Protocol) 1701
PPTP (Point-to-Point Tunneling Protocol) 1723
RDP (Remote Desktop Protocol) 3389
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