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