I find myself running port scans often, and when I do I often run across odd ports that are filtered or wide open. I will be the first to admit that I have not memorized them all, so I felt it would be handy to have a nice reference guide available for when I, or anyone else, needed it. Port numbers are assigned by an organization called IANA and ports are allocated to various needs to avoid confusion. Below is a quick overview and reference chart. I hope you find this handy, and as always Enjoy!
Ports are classified into three (3) main categories:
o Well Known Ports (Port numbers 0 - 1023)
§ Well known ports are used by system or processes run by root or with specific privileges. The port numbers range from 0 to 1023.
o Registered Ports (Port numbers1024 - 49151)
§ The registered port numbers range from 1024-49151. Such ports are used by programs run by users in the system.
o Private or Dynamic Ports (Port numbers 49152 - 65535)
§ Private ports are not assigned for any specific purpose. its range are from range 49152–65535
Link to the full and up to date list from the IANA organization direct:
http://www.iana.org/assignments/port-numbers
http://www.iana.org/assignments/port-numbers
Highlights of the Commonly Used Port Numbers and their Functions:
Port Number | Protocol | Function
21 TCP FTP (File Transfer Protocol)
22 TCP/UDP SSH (ssh,scp copy or sftp)
23 TCP/UDP Telnet
25 TCP/UDP SMTP (for sending outgoing emails)
43 TCP WHOIS function
53 TCP/UDP DNS Server (Domain name service for DNS requests)
67 UDP DHCP Server
68 UDP DHCP Client
70 TCP Gopher Protocol
79 TCP Finger protocol
80 TCP HTTP
110 TCP POP3 (for receiving email)
115 TCP SFTP (Secure File Transfer Protocol)
119 TCP NNTP (Network News Transfer Protocol)
119 TCP NNTP (Network New Transfer Protocol)
123 TCP NTP (Network Time Protocol)
137 TCP NetBIOS-ns
138 TCP NetBIOS-dgm
139 TCP NetBIOS
143 TCP/UDP IMAP4 Protocol (for email service)
161 TCP SNMP (Simple Network Management Protocol)
194 TCP IRC
220 TCP IMAP3 (Internet Message Access Protocol 3)
389 TCP/UDP LDAP (lightweight directory access)
443 TCP Secure HTTP over SSL (https)
445 TCP SMB (NetBIOS over TCP)
465 TCP Secure SMTP (email) using SSL
666 TCP/UDP Doom
990 TCP/UDP Secure FTP using SSL
993 TCP Secure IMAP protocol over SSL (for emails)
995 TCP SPOP (Secure Post Office Protocol)
1352 TCP Lotus Notes
1433 TCP/UDP Microsoft SQL server port
1494 TCP Citrix ICA Protocol
1521 TCP Oracle SQL
1604 TCP Citrix ICA / Microsoft Terminal Server
2049 TCP NFS (Network File System)
2082 TCP Cpanel default port
2083 TCP Cpanel over SSL
2086 TCP Cpanel Webhost Manager (default)
2087 TCP Cpanel Webhost Manager (with https)
2095 TCP Cpanel Webmail
2096 TCP Cpanel secure webmail over SSL
2222 TCP DirectAdmin Server Control Panel (Common for SSH as well)
3306 TCP/UDP MySQL Database Server
3389 TCP/UDP RDP
4000 TCP ICQ
4643 TCP Virtuosso Power Panel
5010 TCP Yahoo! Messenger
5190 TCP AOL Instant Messenger
5432 TCP PostgreSQL Database Server
5632 TCP PCAnywhere
5800 TCP VNC
5900 TCP VNC
6000 TCP X Windowing System
6699 TCP Napster
7070 TCP RealServer / QuickTime
8080 TCP HTTP port (alternative one for port 80)
8087 TCP Plesk Control Panel Port (default)
8443 TCP Plesk Server Control Panel over SSL
9999 TCP Urchin Web Analytics
10000 TCP Webmin Server Control Panel
19638 TCP Ensim Server Control Panel
26000 TCP Quake
27010 TCP Half-Life
27960 TCP Quake III
+++++TBD-COMMON TROJAN & RAT PORTS++++
