Port Numbers Flashcards
Port 21
TCP- File Transfer Protocol is used to transfer files from host to host.
Port 22
TCP/UDP - Secure Shell (SSH) is used to remotely administer network devices and systems.
SCP is used for secure copy and SFTP for secure FTP.
Port 23
TCP/UDP - Telnet, unencrypted method to remotely administer network devices (should not be used)
Port 25
TCP - SMTP, Simple Mail Transfer Protocol is used to send email over the Internet
Port 53
TCP/UDP- DNS, Domain Name Service is used to resolve hostnames to IPs and IPs to hostnames
Port 69
UDP - TFTP, Trivial FTP is used as a simplified version of FTP to put a file on a remote host, or get a file from a remote host.
Port 80
TCP - HTTP, Hyper Text Transfer Protocol is used to transmit web page data to a client for unsecured web browsing
Port 88
TCP/UDP - Kerberos, used for network authentication using a system of tickets within a Windows domain
Port 110
TCP - POP3, Post Office Protocol v3 is used to receive email from a mail server.
Port 119
TCP - NNTP, Network News Transfer Protocol is used to transport Usenet articles.
Port 135
TCP/UDP - Remote Procedure Call is used to located DCOM ports request a service from a program on another computer on the network
Port 137-139
TCP/UDP - NetBIOs, is used to conduct name querying, sending of data, and other functions over a NetBIOS connection.
Port 143
TCP - IMAP, Internet Message Access Protocol is used to receive email from a mail server with more features than POP3
Port 161
UDP - SNMP, Simple Network Management Protocol is used to remotely monitor network devices
Port 162
TCP/UDP - SNMPTRAP, Used to send Trap and InformRequests to the SNMP Manager on a network.
Port 389
TCP/UDP - LDAP, Lightweight Directory Access Protocol is used to maintain directories of users and other objects.
Port 443
TCP - HTTPS, Hyper Text Transfer Protocol Secure is used to transmit web page data to a client over an SSL/TLS-encrypted connection.
Port 445
TCP - SMB, Server Message Block is used to provide shared access to files and other resources on a network.
Port 465/587
TCP - SMTP, Simple Mail Transfer Protocol used to send email over the Internet with an SSL and TLS secured connection.
Port 514
UDP - Syslog, is used to conduct computer message logging, especially for routers and firewall logs.
Port 636
TCP/ UDP - LDAP, is used to maintain directories of users and other objects over an encrypted SSL/TLS connection
Port 860
TCP - iSCSI is used for linking data storage facilities over IP.
Port 989/990
TCP - FTPS, File Transfer Protocol Secure is used to transfer files from host to host over an encrypted connection
Port 995
TCP - POP3, Post Office Protocol v3 is used to receive email from a mail server using an SSL/TLS-encrypted connection.
Port 993
TCP- IMAP4, Internet Message Access Protocol is used to receive email from a mail server over an SSL/TLS-encrypted connection
Port 1433
TCP- Microsoft SQL server is used to receive SQL database queries from clients
Port 1645/1646
UDP- RADIUS, Remote Authentication Dial-In User Service is used for authentication and authorization (1645) and accounting (1646).
Port 1701
UDP- L2TP, Layer 2 Tunnel Protocol is used as an underlying VPN protocol but has no inherent security.
Port 1723
TCP/ UDP - PPTP, Point-to-Point Tunneling Protocol is an underlying VPN protocol with built-in security.
Port 1812/1813
UDP - RADIUS, Remote Authentication Dial-In User Service is used for authentication and authorization (1812) and accounting (1813).
Port 3225
TCP/ UDP - FCIP, Fibre Channel IP is used to encapsulate Fibre Channel frames within TCP/IP packets.
Port 3260
TCP - iSCSI Target is as the listening port for iSCSI-targeted devices when linking data storage facilities over IP.
Port 3389
TCP/ UDP - RDP, Remote Desktop Protocol is used to remotely view and control other Windows systems via a Graphical User Interface.
Port 3868
TCP - DIAMETER, A more advanced AAA protocol that is a replacement for RADIUS
Port 6514
TCP- Syslog, It is used to conduct computer message logging, especially for routers and firewall logs, over a TLS-encrypted connection.