What is port exactly? For some people maybe it raise a big question behind it. Especially if we talk about networking. Maybe some of you have already know about it. But let us take a look for while what is it look like.
Here some definition of Port and how is it relates about networking. Port is an endpoint of communication in an operating system. A port is always associated with an IP address of a host and the protocol type of the communication, and thus completes the destination or origination address of a communications session. A port is identified for each address and protocol by a 16-bit number, commonly known as the port number. The protocols that primarily use ports are the transport layer protocols, such as the Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP) of the Internet Protocol Suite. Specific port numbers are often used to identify specific services. (Source : Wikipedia)
What port numbers are actually used for these services? And what kind of services its assigned for ? We can find it in the list below. Let us take a look.
| PORT NUMBERS | SERVICES | PORT TYPE |
|---|---|---|
| 7 | Echo | |
| 19 | Chargen | |
| 20-21 | FTP | |
| 22 | SSH/SCP | Encrypted |
| 23 | Telnet | |
| 25 | SMTP | |
| 42 | WINS Replication | |
| 43 | WHOIS | |
| 49 | TACACS | |
| 53 | DNS | |
| 67-68 | DHCP/BOOTP | |
| 69 | TFTP | |
| 70 | Gopher | |
| 79 | Finger | |
| 80 | HTTP | |
| 88 | Kerberos | |
| 102 | MS Exchange | |
| 110 | POP3 | |
| 113 | Ident | |
| 119 | NNTP (Usenet) | |
| 123 | NTP | |
| 135 | Microsoft RPC | |
| 137-139 | NetBIOS | |
| 143 | IMAP4 | |
| 161-162 | SNMP | |
| 177 | XDMCP | |
| 201 | AppleTalk | |
| 264 | BGMP | |
| 318 | TSP | |
| 381-383 | HP Openview | |
| 389 | LDAP | |
| 411-412 | Direct Connect | Streaming |
| 443 | HTTP over SSL | Encrypted |
| 445 | Microsoft DS | |
| 464 | Kerberos | |
| 465 | SMTP over SSL | Encrypted |
| 497 | Retrospect | |
| 500 | ISAKMP | Encrypted |
| 512 | rexec | |
| 513 | rlogin | |
| 514 | syslog | |
| 515 | LPD/LPR | |
| 520 | RIP | |
| 521 | RIPng (IPv6) | |
| 540 | UUCP | |
| 554 | RTSP | |
| 546-547 | DHCPv6 | |
| 560 | rmonitor | |
| 563 | NNTP over SSL | Encrypted |
| 587 | SMTP | |
| 591 | FileMaker | |
| 593 | Microsoft DCOM | |
| 631 | Internet Printing | |
| 636 | LDAP over SSL | Encrypted |
| 639 | MSDP (PIM) | |
| 646 | LDP (MPLS) | |
| 691 | MS Exchange | |
| 860 | iSCSI | |
| 873 | rsync | |
| 902 | VMware Server | |
| 989-990 | FTP over SSL | Encrypted |
| 993 | IMAP4 over SSL | Encrypted |
| 995 | POP3 over SSL | Encrypted |
| 1025 | Microsoft RPC | |
| 1026-1029 | Windows Messenger | |
| 1080 | SOCKS Proxy | |
| 1080 | MyDoom | Malicious |
| 1194 | OpenVPN | |
| 1214 | Kazaa | Peer to Peer |
| 1241 | Nessus | |
| 1311 | Dell OpenManage | |
| 1337 | WASTE | Peer to Peer |
| 1433-1434 | Microsoft SQL | |
| 1512 | WINS | |
| 1589 | Cisco VQP | |
| 1701 | L2TP | |
| 1723 | MS PPTP | |
| 1725 | Steam | Gaming |
| 1741 | CiscoWorks 2000 | |
| 1755 | MS Media Server | Streaming |
| 1812-1813 | RADIUS | |
| 1863 | MSN | Chat |
| 1985 | Cisco HSRP | |
| 2000 | Cisco SCCP | |
| 2002 | Cisco ACS | |
| 2049 | NFS | |
| 2082-2083 | cPanel | |
| 2100 | Oracle XDB | |
| 2222 | DirectAdmin | |
| 2302 | Halo | Gaming |
| 2483-2484 | Oracle DB | |
| 2745 | Bagle.H | Malicious |
| 2967 | Symantec AV | |
| 3050 | Interbase DB | |
| 3074 | XBOX Live | Gaming |
| 3124 | HTTP Proxy | |
| 3127 | MyDoom | Malicious |
| 3128 | HTTP Proxy | |
| 3222 | GLBP | |
| 3260 | iSCSI Target | |
| 3306 | MySQL | |
| 3389 | Terminal Server | |
| 3689 | iTunes | |
| 3690 | Subversion | |
| 3724 | World of Warcraft | Gaming |
| 3784-3785 | Ventrilo | Streaming |
| 4333 | mSQL | |
| 4444 | Blaster | Malicious |
| 4664 | Google Desktop | |
| 4672 | eMule | Peer to Peer |
| 4899 | Radmin | |
| 5000 | UPnP | |
| 5001 | Slingbox | Streaming |
| 5001 | iperf | |
| 5004-5005 | RTP | Streaming |
| 5050 | Yahoo! Messenger | Chat |
| 5060 | SIP | Streaming |
| 5190 | AIM/ICQ | Chat |
| 5222-5223 | XMPP/Jabber | Chat |
| 5432 | PostgreSQL | |
| 5500 | VNC Server | |
| 5554 | Sasser | Malicious |
| 5631-5632 | pcAnywhere | |
| 5800 | VNC over HTTP | |
| 5900+ | VNC Server | |
| 6000-6001 | X11 | |
| 6112 | Battle.net | Gaming |
| 6129 | DameWare | |
| 6257 | WinMX | Peer to Peer |
| 6346-6347 | Gnutella | Peer to Peer |
| 6500 | GameSpy Arcade | Gaming |
| 6566 | SANE | |
| 6588 | AnalogX | |
| 6665-6669 | IRC | Chat |
| 6679/6697 | IRC over SSL | Chat |
| 6699 | Napster | Peer to Peer |
| 6881-6999 | BitTorrent | Peer to Peer |
| 6891-6901 | Windows Live | Chat |
| 6970 | Quicktime | Streaming |
| 7212 | GhostSurf | |
| 7648-7649 | CU-SeeMe | Chat |
| 8000 | Internet Radio | Streaming |
| 8080 | HTTP Proxy | |
| 8086-8087 | Kaspersky AV | |
| 8118 | Privoxy | |
| 8200 | VMware Server | |
| 8500 | Adobe ColdFusion | |
| 8767 | TeamSpeak | Chat |
| 8866 | Bagle.B | Malicious |
| 9100 | HP JetDirect | |
| 9101-9103 | Bacula | |
| 9119 | MXit | Chat |
| 9800 | WebDAV | |
| 9898 | Dabber | Malicious |
| 9988 | Rbot/Spybot | Malicious |
| 9999 | Urchin | |
| 10000 | Webmin | |
| 10000 | BackupExec | |
| 10113-10116 | NetIQ | |
| 11371 | OpenPGP | |
| 12035-12036 | Second Life | Gaming |
| 12345 | NetBus | Malicious |
| 13720-13721 | NetBackup | |
| 14567 | Battlefield | Gaming |
| 15118 | Dipnet/Oddbob | Gaming |
| 19226 | AdminSecure | |
| 19638 | Ensim | |
| 20000 | Usermin | |
| 24800 | Synergy | Streaming |
| 25999 | Xfire | Chat |
| 27015 | Half-Life | Gaming |
| 27374 | Sub7 | Malicious |
| 28960 | Call of Duty | Gaming |
| 31337 | Back Orifice | Malicious |
| 33434+ | Traceroute |
Thank your for following this little tutorial. Hope this will help.
ITECHMIN 