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Universidad de Salamanca
Pablo Gallardo's Blog
My professional web log about IT, Cybersecurity & Project Management
 

TCP and UDP Services and Ports

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)

UDP 5355: LLMNR

TCP 6000-6063: X Window

TCP 9100: HP JetDirect printing

TCP/UDP 48101: used by the infected devices to spread malicious files to the other devices in the network

 

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

pmgallardo

About pmgallardo

I studied Computer Science at University of Salamanca. Since then, I have been working first as developer and then as SAP consutant. This blog is about problems I dealt when using computers, and more important, the solutions I found. Whenever I am on an issue and suddenlly I have a flash that leads me to a solution, I document my discoveries in a post.

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