TCP 20: File Transfer Protocol (FTP) Active Mode Data Connection
TCP 21: File Transfer Protocol (FTP) Passive Mode Data Connection
TPC 22: SSH
TCP 23: Telnet
TCP 25: Simple Mail Transfer Protocl SMTP
UDP/TCP 50: Remote Mail Checking Protocol
TCP 51: IANA reserved
TCP/UDP 53: Domain Name System (DNS) Zone Transfer
UPD 67: Dynamic Host Configuration Protocol (DHCP)
TCP/UDP 69: Trivial File Transfer Protocol (TFTP)
TCP 80: HTTP
TCP 110: Post Office Protocol (POP3)
UDP 123: Network Time Protocol (NTP)
TCP/UDP 135: Microsoft RPC Endpoint Mapper
UDP 137: NetBIOS Name Service (NBNS)
TCP/UDP 138: netbios-dgm
TCP 139: NetBIOS Session Service (SMB over NetBIOS)
TCP 143: Internet Message Access Protocol (IMAP4)
UDP 161: Simple Network Management Protocol (SNMP)
TCP/UDP 162: SNMP Trap
TCP/UDP 389: Lightweight Directory Access Protocol (LDAP)
TCP 443: HTTPS
TCP/UDP 445: SMB over TCP (Direct Host)
TCP 465: Implicit STMP
UDP 500: (ISAKMP)/Internet Key Exchange (IKE)
UDP 514: syslog
TCP 515: Line Printer Remote (LPR) or Daemon (LPD)
TCP 587: STARTTLS
TCP/UDP 1080: SOCKS
TCP 1241: Nessus daemon
TCP 1433-1434: Microsoft SQL Server
TCP 1521: Oracle
UDP 1701: L2TP
TCP 1720: H.323
TCP 1723: PPTP
TCP/UDP 2000-2001: Session Initiation Protocol (SIP)
TCP 2049: Network File System (NFS)
TCP 3389: RDP
UDP port 4500: IPsec NAT-T
TCP/UDP 5050: Session Initiation Protocol (SIP)
TCP/UDP 5060-5061: Session Initiation Protocol (SIP)
TCP 6000-6063: X Window
TCP 9100: HP JetDirect printing
Ports required to know in CEH v10 exam: 22, 23, 25, 50, 51, 53, 69, 80, 123, 135, 137, 139, 161, 162, 389, 443, 445, 500, 514, 515, 1080, 1241, 2000, 2001, 4500, 5050, 5060, 5061, 5355, 48101
Ports required to know in CISSP 2021 exam: 20, 21, 22, 23, 25, 53, 67, 69, 80, 110, 123, 135, 137, 139, 143, 161, 443, 445, 465, 515, 587, 1443, 1701, 1723, 2049, 6000-6063.
External references
- IANA; “Service Name and Transport Protocol Port Number Registry“; Internet Assigned Numbers Authority (IANA)
- Wikipedia; “List of TCP and UDP port numbers“; Wikipedia
- “CISSP Study Guide Ninth Edition”
- Chapter 11, Section “Common Application Layer Protocols”, pp. 506-507
- Chapter 15, Section “Network Vulnerability Scanner”, pp. 738-739