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Front 1

TCP 20 and 21

Back 1

FTP. File Transfer Protocol. 20 and 21 are used for all FTP based file transfers, e.g. with programs like FTP Voyager, WS_FTP, Cute FTP, FTP NOW etc.)

Front 2

TCP 23

Back 2

Telnet. Used by all Telnet applications.

Front 3

UDP 53

Back 3

DNS Port used by clients and servers when exchanging domain name information and routing.

Front 4

UDP 80

Back 4

HTTP: Port through which most Internet traffic flows, through HTTP requests. This is the port used by web browsers to browse the web.

Front 5

UDP 123

Back 5

NTP

Front 6

TCP 22

Back 6

SSH Server Listening Port. Port is used by SSH servers to listen for incoming connections.

Front 7

TCP 25

Back 7

SMTP mail port. Standard port used for SMTP mail delivery. The outgoing mail port used by programs like Outlook Express, Outlook, FoxMail, etc. Also the SMTP outgoing port for mail servers like Axigen Mail Server, CMailServer, Novell GroupWise, Microsoft Exchange, etc.

Front 8

UDP 69

Back 8

TFTP

Front 9

UDP 110

Back 9

POP3 Standard port used for POP3 mail delivery and collection. Often referred to as the Incoming Mail port in e-mail programs including Outlook Express, Outlook, Fox Mail, etc.

Front 10

PORT 67

Back 10

DHCP port for DHCP requests and replies. (Dynamic Host Configuration Protocol) Used by the DHCP server and clients when the client checks with the DHCP server for a new leas and the allocation of an IP addres.

Front 11

PORT 42

Back 11

WINS Replication Port (used to replicate NETBIOS name tables from one Windows server to another)

Front 12

PORT 43

Back 12

WHOIS port (used for WhoIs requests (for the retrieval of domain name information) to whois servers

Front 13

PORT 53

Back 13

DNS port for DNS requests and replies. (used to replicate NETBIOS name tables from one Windows server to another)

Front 14

PORT 79

Back 14

Finger command for SMTP Mailservers ETRN Finger port. This port is used by SMTP mail servers to send ETRN Finger commands to message queue servers so that htose message queue servers are online and ready to accept queued mail. Basically, the port the e-mail server uses to send an ETRN command to your web-hosting company's mail server so that they will delivery any waiting incoming mail.

Front 15

PORT 102

Back 15

X.400. Port is used by default by Microsoft Exchange Server Message Transfer Agents to communicate with one another on internal networks with multiple Exchange servers.

Front 16

PORT 115

Back 16

SFTP port. Used for FTP file transfers and modifications over a SSH connection.

Front 17

PORT 119

Back 17

Newsgroups port. Used for newsgroups access.

Front 18

Port 123

Back 18

NTP: Network Time Protocol port. Used for checking and synchronising time with another computer (time server). Windows Vista uses this port when you configure the clock to automatically synchronize itself with a time server on the Internet. Also used when you configure a Windows Server to sync its time over the Internet.

Front 19

PORT 135

Back 19

RPC (Remote Procedure Call) Locator Service Port: Maintains a list of networked services that support RPC and DCOM standards. This list holds information regarding which ports and IP addresses the services are running or listening on.

Front 20

PORT 137

Back 20

NetBIOS Name Service port (WINS): Port used by the NetBIOS protocol to find other computers on a workgroup network. On a P2P network this will be done via broadcast.

Front 21

PORT 143

Back 21

IMAP4 port: Used by IMAP4 servers.

Front 22

PORT 161

Back 22

SNMP port (Simple Network Management Protocol) UDP port used ot manage, configure and gather information about network devices (e.g. firewalls, routers) in a unified manner across manufacturers

Front 23

PORT 179

Back 23

BGP. Border Gateway Protocol is a routing protocol used to exchange routing information between routers in autonomous networks.

Front 24

PORT 379

Back 24

SRS Port (Site Replication Services) TCP port used by Microsoft SRS. Allows LDAP enabled servers to replicate between one another information stored on AD domain controllers and Exchange servers.

Front 25

PORT 389

Back 25

LDAP Port: TCP port used to find and manage network resources on a hierarchical network system such as Novell Network Directory Trees, and AD Service Domains.

Front 26

PORT 443

Back 26

S-HTTP (SSL Port) Default port used for SSL encrypted communications. Used for both incoming and outgoing SSL connections.

Front 27

PORT 445

Back 27

Microsoft AD and Service Message Block (SMB) protocols. SMB is known as the Microsoft Windows Network, and is the main protocol used by Microsoft Server Operating Systems for client/server acces, and file and printer sharing.

Front 28

PORT 465

Back 28

Google Mail Outgoing Mail Server: Non-standard port used by Google for its Outgoing Mail Server for Google Mail. Use this port, smtp.gmail.com and SSL connection (SMTP Server Authentication) when configuring you e-mail client for G-Mail.

Front 29

PORT 636

Back 29

LDAP over SSL: TCP Port used for LDAP over SSL connections. Standard added to LDAP to prevent interception of information and credentials using the LDAP protoocl.

Front 30

PORT 993

Back 30

Secure IMAP port: TCP port used for SSL Secured IMAP 4 access.

Front 31

PORT 995

Back 31

GMail Incoming POP3 Mail Server: Non-standard port used by Google for its POP3 Incoming Mail Server for GMail.

Front 32

PORT 1026

Back 32

CAP (Novell and Microsoft) Port is used by Novell GroupWise for its Calendar Access Protocol. On some Windows 2000 servers, port 1026 is used by the Windows Task Scheduler or other Windows services.

Front 33

PORT 1080

Back 33

SOCKS/Online Chat/Hotmail: Port used primarily by instant messaging applications, as well as Hotmail.

Front 34

PORT 1090

Back 34

RealAudio port; used by Real Audio for streaming audio and video applications.

Front 35

PORT 1433

Back 35

SQL Server Port & SQL Server Replication Port: Used by SQL Server 6 and above for SQL replication between SQL servers.

Front 36

PORT 1434

Back 36

SQL Server Monitoring Port: Used by Microsoft SQL Server to monitor SQL server performance.

Front 37

PORT 1521

Back 37

Default Oracle Port: Default port for connection to Oracle DB server.

Front 38

PORT 1677

Back 38

Novell GroupWise: Standard port used by Novell GroupWise for TCP/IP communications between clients and agents and the GroupWise Post Office Agent (POA)

Front 39

PORT 1701

Back 39

L2TP: Layer 2 Tunneling Protocol: Tunneling and encryption standard used to connect two private business networks together over an Internet connection to create a VPN. This protocol is seen as the replacement for PPTP (Port 1723)

Front 40

PORT 1720

Back 40

H.323 Port: Used for video conferencing equipment which uses the H.323 protocol

Front 41

PORT 1723

Back 41

PPTP Port: Point to Point Tunneling Protocol: PPTP is a tunneling and encryption standard used to link two private business networks together over an Internet connection to create a VPN. Default protocol for establishing a VPN on Windows 2000 Server .

Front 42

PORT 1900

Back 42

Media Center Extender: XBox 360 port: UDP inbound. Used by Microsoft's XBox 360 when linking to Media Center.

Front 43

PORT 2409

Back 43

SPAMFighter Content Classification Port: UDP inbound and outbound. Used by SPAMFighter software to communicate with its servers in order to determine which e-mails are spam.

Front 44

PORT 3101

Back 44

BES Synchronization Port: If you have an outbound firewall, you will need to open this TCP port to enable the BES to sync with the BlackBerry devices. Depending on the configuration, you may also need to port forward port 3101 from the router to the BES.

Front 45

PORT 3306

Back 45

Default MySQL Port. Default port for connection to a MySQL database server.

Front 46

PORT 3389

Back 46

Remote Desktop Port and Terminal Services Port: TCP inbound & outbound. Used by Windows XP Remote Desktop Connection and Microsoft Terminal Server for remote Desktop Connectoins and/or Terminal Services sessions. For added security it is recommended to change the Remote Desktop port from its default to a value of your choosing.

Front 47

PORT 3390

Back 47

Media Center Extender - XBox 360 port: TCP Inbound. Port used by XBox 360 to link to Media Center.

Front 48

PORT 3535

Back 48

GoDaddy Secure SMTP Relay port.

Front 49

PORT 4321

Back 49

RWHOIS port. Used for RWHOIS requests.

Front 50

PORT 5361

Back 50

PCAnywhere: Port on which a Symantec PC Anywhere host accepts incoming PC Anywhere connections and then continues to communicate with the remote PC.

Front 51

PORT 5632

Back 51

PC Anywhere UDP incoming port; Port used by Symantec's PC Anywhere for the streaming of screen updates during a PC Anywhere session.

Front 52

PORT 8080

Back 52

HTTP Internet Traffic port: The *other* port through which HTTP Internet traffic also goes through.

Front 53

PORT 8880

Back 53

CDDB Port: Used by CD mastering software to communicate with an Internet based CDDB server for requests about artist and track names.