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Common Ports

Security+ Common Ports

QuestionAnswer
20 TCP 21 TCP File Transfer Protocol (FTP)
22 TCP and UDP Secure Shell (SSH)
23 TCP Telnet
25 TCP Simple Mail Transfer Protocol (SMTP)
49 TCP and UDP Terminal Access Controller Access-Control System (TACACS)
*IP protocol number 50 Encapsulating Security Payload (ESP) (used with IPSec) * Is not a port number, but an IP protocol number used with IPSec.
*IP protocol number 51 Authenticating Header (AH) (used with IPSec) * Is not a port number, but an IP protocol number used with IPSec.
53 TCP and UDP Domain Name Server (DNS)
67 UDP 68 UDP Dynamic Host Configuration Protocol (DHCP)
69 UDP Trivial File Transfer Protocol (TFTP)
80 TCP HyperText Transfer Protocol (HTTP)
88 TCP Kerberos
110 TCP Post Office Protocol (POP3)
119 TCP Network News Transport Protocol (NNTP)
123 UDP Network Time Protocol (NTP)
135 TCP 137 and 138 TCP and UDP 139 TCP Network Basic Input/Output System (NetBIOS)
143 TCP and UDP Internet Message Access Protocol (IMAP4)
161 TCP and UDP 162 TCP and UDP Simple Network Management Protocol (SNMP)
389 TCP and UDP Lightweight Directory Access Protocol (LDAP)
443 TCP and UDP HTTP with Secure Sockets Layer (SSL)
445 TCP Windows 2000 CIFS/SMB (file access)
500 UDP Internet Key Exchange (IKE) (used with IPSec)
636 TCP and UDP Lightweight Directory Access Protocol over TLS/SSL (LDAPS)
1701 UDP Layer 2 Tunneling Protocol (L2TP)
1723 TCP and UDP Point-to-Point Tunneling Protocol (PPTP)
1812 TCP and UDP 1813 TCP and UDP Remote Authentication Dial In User Service (RADIUS)
3389 TCP Remote Desktop Protocol (RDP)
Created by: 1463177753
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