PORTS

FTP

FTP

TCP 20 & 21

SSH

TCP 22

Telnet

TCP 23

SMTP

TCP 25

WHOIS

TCP 43

TACACS+

TCP 49

DNS

TCP, UDP 53

DHCP

UDP 67 & 68

TFTP

UDP 69

Gopher

TCP 70

Finger

TCP 79

HTTP

TCP 80

Kerberos

TCP, UDP 88

POP3

TCP 110

NNTP

TCP 119

NTP

UDP 123

IMAP4

TCP, UDP 143

SNMP

TCP, UDP 161 & 162

LDAP

TCP, UDP 389

HTTPS (over TLS/SSL)

TCP 443

SMTPS (over TLS/SSL)

TCP 465

IKE

UDP 500

ISAKMP

UDP 500

NNTPS (over TLS/SSL)

TCP, UDP 563

LDAPS (over TLS/SSL)

TCP, UDP 636

Secured Telnet (over TLS/SSL)

TCP, UDP 992

IMAPS (over SSL)

TCP 993

POP3S (over TLS/SSL)

TCP 995

SOCKS

TCP 1080

IPSec

TCP, UDP 1293

L2TP

UDP 1701

PPTP

TCP 1723

RADIUS

UDP 1812 & 1813

NFS

TCP 2049

RDP

TCP 3389

MS-LA

TCP, UDP 3535

Diameter base

TCP, SCTP 3868

HTTP alternate

TCP 8080

SIP

TCP, UDP 5060

SIPS (over TLS)

TCP 5061