Well Known Ports and Services Flashcards
Port 22 TCP/UDP
SSH, SCP, SFTP
Secure Shell, Secure Copy, Secure FTP
remote access to shell (think terminal) for boxes and systems.
Port 23 TCP/UDP
TELNET
Unencrypted method to remotely access network devices (should not be used {free roots baby})
Port 21
FTP
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File Transfer Protocol is used to transfer files from host to host
Port 25 TCP
SMTP
Simple Mail Transfer Protocol
is used to transfer email.
Port 53 TCP/UDP
DNS
Domain Name Server is used to resolve hostnames and IPs and vice versa.
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
80 TCP
HTTP
Hyper Text Transfer Protocol is used to transmit web page data to clients for unsecured browsing.
Port 88 TCP/UDP
Kerberos
Used for network authentication using a system of tickets within a Windows domains.
Port 110 TCP
POP3
Post Office Protocol v3 is used to receive email from a mail server
Port 135 TCP/UDP
RPC/DCOM-scm
Remote Procedure Call is used to locate DCOM ports to request a service from a program on another computer on the network.
Port 137-139 TCP/UDP
NetBIOS
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 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.
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.
465/587 TCP
SMTP with SSL/TLS
Simple Mail Transfer Protocol used to send email over the internet with an SSL and TSL connection secured connection.
Port 514 UDP
Syslog
Syslog is used to conduct computer message logging, especially for routers and firewall logs.
Port 663 TCP/UDP
LDAP SSL/TLS
LDAP is used to maintain directories of users and other objects over an encrypted SSL/TLS connection.
Port 860 TCP
iSCUSI
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 encrypted connection.
Port 995 TCP
POP3 (SSL/TSL)
Post Office Protocol Version 3 used to receive email from a mail server using 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 (alternative)
Remote Authentication Dial-In User Service is used for authentication (1645 )and authorization (1646).
Port 1701 UDP
L2TP
Layer 2 Tunnel Protocol is used as an underlying VPN protocol and has no inherent security.
Port 1723 TCP/UDP
PPTP
Point-to-Point Tunneling Protocol is an underlying VPN 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 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
Amore advanced version of AAA protocol that is a replacement for RADIUS
Port 6514 TCP
Syslog over TLS
It is used to conduct computer logging messaging, especially for routers and firewall logs, over a TLS encrypted connection
