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